YZC12C operating manual

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INTRODUCTION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 I
Introduction 
 
Thank you for choosing “SANY” Full Hydraulic 
Double Drum Vibratory Roller. We will offer you 
high-quality products and star-grade after-sales 
service. Our company, absorbing the domestic and 
international advanced technology of rollers, and 
based on long-term experience in designing and 
manufacturing construction machinery, has 
developed an innovative product -- Full Hydraulic 
Double Drum Vibratory Roller. It is a kind of 
engineering machinery with multiple purposes and 
high efficiency. It can be widely used in the 
construction of such projects as the high-grade 
highway, airport, dam, port, railway and mine. It can 
be used for the compaction of asphalt concrete 
pavement and RCC concrete pavement, as well as 
middle/small subgrade, sub-roadbed and stabilized 
course. 
In this Operation Manual, we will introduce to 
you such contents as performance parameters, 
technical characteristics, operating principle, 
structural components, safety operation, and 
maintenance of the machine. 
 
 
In order to properly use the machine, you must 
read this Operation Manual carefully before 
operation. This helps: 
 to know the machine better; 
 to avoid troubles due to improper operation; 
 to improve the machine reliability; 
 To increase the service life of the machine; and 
 To reduce the repair cost and downtimes. 
Put this Manual within your reach for your 
reference at any time. Only when you completely 
understand the Operation Manual, can you operate 
the machine expertly and safely. 
Thank you for your trust in “SANY”. We wish 
you great success in your business. 
 
 
 
 
 
 
 
 
 
 
 
 
 
SANY Heavy Industry Co., Ltd. 
 
 
 
 
 
 
 INTRODUCTION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 II 
 
Special Instructions 
You must carefully maintain and properly use 
the roller. SANY accepts no liability resulting from 
operations against the instructions. 
 Before operation, you must read this Operation 
Manual carefully. Carry out operation in 
accordance with the detailed requirements. 
 Use the roller for the purposes specified in the 
Operation Manual. Do not use it for other 
purposes. 
 The machine must be operated by well-trained 
and skillful operators. The operator must keep 
calm, quick-witted and in steady mood during 
operation. 
 Do not ask unskilled technicians to repair or 
disassemble the machine. 
 The machine must be maintained according to 
the requirements as specified in this Manual. 
 Maintain the engine strictly as per the User’s 
Guide provided by the engine manufacturer. 
 
Acceptance 
1. After receiving the roller, you must check the 
machine and accessories against the list. If you 
find the machine damaged or spare parts lost, 
you must inform the department responsible for 
shipping as soon as possible. 
2. When contacting after-sales service staff of 
SANY or local service department, do 
remember to provide the model, and ex-factory 
number of the roller and the serial number of 
the engine. 
3. The rating plate of the roller is shown in the 
figure. 
 
12500
 
 
4. The serial number of the engine may be found 
on the engine rating plate. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CUMMINS Engine 
DEUTZ Engine 
READING GUIDANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 III
Reading Guidance 
1. Information 
The Operation Manual is intended to 
familiarize users with the use and maintenance of 
the machine. You must put it in the cab for your 
reference at any time. In the event of any damage 
or lost, you should order another one from SANY 
Heavy Industry Co., Ltd. The Operation Manual 
covers the information for performance parameters, 
technical characteristics, operating principle, 
structural components, safety operation and 
maintenance of the machine. 
Some photos or details in figure or optional 
components in the Operation Manual may differ 
from your machine. For facilitating the explanation, 
the guard board and cover have been removed. 
Some modifications as a result of constant 
improvement may not be covered in this Manual. 
You must read this Manual carefully and keep it 
with the machine. 
If you have any queries about the machine or 
this Manual, you can contact us for the latest 
information. 
2. Technical Specifications 
This section provides the performance 
parameters, technical characteristics, operating 
principle and structural components of the machine. 
It will help you have an overall idea about the 
machine. 
3. Operation 
This section provides guidance for fresh 
operators and reference for experienced operators. 
It covers a variety of instruments, switches, 
operating mechanism of the machine, as well as 
the transportation of the machine. 
Some photos and figures are provided to guide 
the operator to check, start, operate and shut down 
the machine according to the accurate procedures. 
All instructions provided in this Manual are 
about the basic operation technique. The 
operator’s technique and skills will be enhanced as 
he knows the machine better. 
4. Maintenance 
This section provides guidance for maintaining 
the machine. The maintenance items are listed in 
the maintenance and lubrication interval table. The 
items without specific maintenance intervals are 
listed under the title of “Maintenance Interval”. 
5. Maintenance Interval 
The maintenance interval is determined by 
operating hours or natural time. No matter whether 
it is calculated at operating hours or natural time, 
the maintenance recommended must be carried 
out within the maintenance interval which comes 
first. 
Under the extremely tough, dusty or damp 
working conditions, the maintenance interval shall 
be shortened. 
When you carry out maintenance for certain 
parts, other parts whose maintenance intervals are 
shorter must also be maintained. For example, 
during the maintenance carried every 500h’s 
operation or 3 months, the maintenance items for 
every 250h’s operation or 1 month, as well as those 
for every 10h’s operation or each day must also be 
maintained. 
6. Engine Maintenance 
The proper engine maintenance and overhaul 
are essential for the normal operation of the 
machine and engine. The owner of the machine is 
liable for carrying out maintenance for the engine 
as per the instructions stated in the Parts Manual. 
Any personnel taking on repair, maintenance, 
sales, rent or trade of the machine or engine must 
not disassemble, modify or disable the devices or 
parts installed on or in the machine or engine which 
are in relation to emission and in accordance with 
the laws and regulations. Some parts in the 
machine or engine, such as exhaust system, fuel 
system, electrical system, intake system or cooling 
system, may be in relation to emission, so do not 
alter or modify them without prior approval. 
7. Machine Capability 
The newly-added optional or refitted parts 
unrecognized by SANY may go beyond the 
designed capability of the machine, and 
accordingly produce negative effect on machine 
performance including stability and system 
compatibility, such as braking and steering. 
 
 READING GUIDANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 IV 
8. Explanation of Signs 
 
This is a symbol for "safety caution".This symbol on the machine or in this 
Manual is used to identify dangers of personnel injury. 
Please obey the precautions and methods suggested. 
On the safety plates, this symbol is used together with the words "Danger", 
"Warning" and "Caution". 
 
This symbol is used to identify serious dangerwhich could result in death or 
serious injury if no preventive measures are taken. 
 
This symbol is used to identify medium danger which could result in major 
injury if no preventive measures are taken. 
 
This symbol is used to identify slight danger which could result in minor or 
slight injury if no preventive measures are taken. 
In this Manual, this symbol is also used to call attention to the safety 
instructions. 
 
In order to avoid confusion between the indications for machine protection and 
personnel safety, this symbol is adopted to identify the possible machine 
damage. 
 
This symbol is used to identify the additional specific instructions. 
 
This symbol is used to identify the additional specific instructions. 
 
This symbol is used to identify unsafe operation that is not in accordance with 
safety regulations and is easy to cause casualty. Do not carry out such an 
operation when you see this symbol. 
 
This symbol is used to identify the operation complying with safety 
regulations.. 
 
This symbol is used to identify you must take the special considerations in the 
operation, or else, it may cause accidents. 
 
Caution 
Danger 
Warning 
Important 
Notes 
Notice 
READING GUIDANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 V
 
 
If the description in this Manual is different 
from your machine, your machine prevails. 
 
General Information 
You must carefully read all the operation parts in 
this Manual. For more information about the 
operation of the machine, you can read this 
Manual carefully or consult the local office of 
SANY Heavy Industry Co., Ltd. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Important 
TABLE OF CONTENTS 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 VI 
Table of Contents 
 
Introduction .............................................................................................................................................I 
Reading Guidance.................................................................................................................................III 
Chapter 1 Technical Specification...........................................................................................................1 
1.1 General Description ..................................................................................................................1 
1.1.1 Overall Structure .............................................................................................................1 
1.1.2 Main Technical Characteristics........................................................................................2 
1.2 Technical Parameters................................................................................................................3 
1.3 Function Description .................................................................................................................4 
1.3.1 Frame Assembly .............................................................................................................4 
1.3.2 Central Articulation Frame...............................................................................................5 
1.3.3 Vibratory Drum Assembly................................................................................................6 
1.3.4 Spraying System .............................................................................................................7 
1.3.5 Cab and Control System.................................................................................................8 
1.3.6 Safety Protection Device.................................................................................................8 
1.4 Engine.......................................................................................................................................9 
1.4.1 Air Intake System ..........................................................................................................10 
1.4.2 Exhaust System ............................................................................................................ 11 
1.4.3 Fuel System ..................................................................................................................12 
1.5 Electrical Control Devices .......................................................................................................12 
1.5.1 General .........................................................................................................................12 
1.5.2 Cab Electrical System .............................................................................................................. 13 
1.5.3 Engine Electrical System ..............................................................................................15 
1.5.4 Monitoring Electrical System.........................................................................................17 
1.5.5 Traveling and Brake Control System.............................................................................21 
1.5.6 Vibration Control System ..............................................................................................22 
1.5.7 Spraying Control System...............................................................................................23 
1.5.8 Basic Structure of Distribution Control Cabinet .............................................................25 
1.6 Hydraulic Control Devices .......................................................................................................26 
1.6.1 Traveling Hydraulic System...........................................................................................26 
1.6.2 Vibration Hydraulic System ...........................................................................................26 
1.6.3 Steering Hydraulic System............................................................................................28 
1.6.4 Brake Hydraulic System................................................................................................29 
Chapter 2 Operation and Maintenance ................................................................................................31 
2.1 Starting the Equipment ............................................................................................................31 
2.1.1 Check before Starting:...................................................................................................31 
2.1.2 Starting..........................................................................................................................35 
2.1.3 Check after Starting with the Roller Running in Place ...................................................37 
2.2 Check Before Operation..........................................................................................................37 
2.3 Operating the Working Device ................................................................................................37 
2.3.1 Engine Speed Control ...................................................................................................37 
2.3.2 Traveling .......................................................................................................................37 
2.3.3 Braking During Traveling...............................................................................................37 
2.3.4 Vibratory Compaction....................................................................................................38 
2.3.5 Spraying ........................................................................................................................40 
TABLE OF CONTENTS 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 VII
2.3.6 Parking .........................................................................................................................42 
2.3.7 Text Display .................................................................................................................. 42 
2.4 Cleaning the Equipment ......................................................................................................... 48 
2.5 Maintenance Interval .............................................................................................................. 48 
2.5.1 Routine Maintenance ................................................................................................... 48 
2.5.2 Periodic Maintenance................................................................................................... 48 
2.5.3 Maintenance for Long-term Parking ............................................................................. 50 
2.5.4 Maintenance of Electrical System ................................................................................ 50 
2.5.5 Maintenance of Air Conditioning System...................................................................... 50 
2.6 Checking the Bolts.................................................................................................................. 54 
2.7. Checking the Functional Oil................................................................................................... 56 
2.7.1 Checking for Oil Leaks ................................................................................................. 56 
2.7.2 Checking the Oil and Water Levels .............................................................................. 56 
2.7.3 Table of Oils and Auxiliary Materials............................................................................. 56 
Chapter 3 Transportation of Roller....................................................................................................... 58 
3.1 Transfer Vehicle...................................................................................................................... 58 
3.2 Self-propelled Ascending Transfer Vehicle via Slope ............................................................. 58 
3.3 Loading and Unloading by Crane ........................................................................................... 59 
3.4 Winch Traction........................................................................................................................ 59 
Index.................................................................................................................................................... 61 
Appendix ............................................................................................................................................. 63 
Overall Structure........................................................................................................................... 63 
Hydraulic Basic Diagram .............................................................................................................. 64 
Electrical Schematic Diagram....................................................................................................... 65 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM ROLLER OPERATION MANUAL 
 VIII
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Full Hydraulic Double Drum Vibratory Roller Operation Manual 
Technical Specifications 
 
1.1 General Description 
1.2 Technical Parameters 
1.3 Function Description 
1.4 Engine 
1.5 Electrical Control Devices 
1.6 Hydraulic Control Devices 
 
 
 
 
 
 
 
 
 
P1~29 
 
 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 1
Chapter 1 Technical Specification 
 
1.1 General Description 
The SANY double drum vibratory roller adopts full 
hydraulic transmission, double drum drive, double 
drum vibration and self-propelled structure. Adopting 
articulation steering, the front frame and the rear frame 
are connected together by the central articulation frame, 
and equipped with crab-walk mechanism with excellent 
performance. The double drum vibratory roller is mainly 
applicable for the compaction of asphalt concrete 
pavement and RCC concrete pavement of high-grade 
highway and high-standard projects such as railway 
subgrade, airport, dam, dock, and for the compaction 
of subgrade and sub-roadbed as well. 
 
1.1.1 Overall Structure 
 
 
 
 
 
 
 
 
1-Spraying system (two sets) 2-Rear frame assembly 3-Central articulation frame 4-Hydraulic system 
5-Front frame assembly 6-Vibratory drum assembly (one set for front and rear respectively) 
7-Power system assembly 8-Console assembly 9-Air conditioner 10-Cab 
11-Electrical system 12-Covering parts assembly 
Fig. 1-1 Overall Structure of Double Drum Vibratory Roller (With Cab) 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 2 
1.1.2 Main Technical Characteristics 
 Double drum two-gear stepless shifting traveling 
and double frequency double amplitude vibration 
system that can meet requirements for traction and 
compaction in different conditions. 
 Frame of fork foot type structure which makes it 
easier to get close to the obstructions. 
 Vibration bearing squirrel bag lubricating cooling 
structure with national patent that can ensure roller 
with longer service life. 
 Double articulation steering crab-walk mechanism 
that is convenient for compaction at curve and 
curb. 
 Intelligent electric control system for control of 
engine speed, achieving the scientific matching 
between output power and working condition. 
 Three-stage filtering and stepless flow adjusting 
spraying system, providing higher working quality. 
 Three-grade damping and air-conditioned cab with 
functions such as sound insulation, heat insulation, 
waterproof, and dustproof, complying with the 
design theory of ergonomics. 
 Three-grade brake system with mechanical, 
electrical and hydraulic control, ensuring safe and 
reliable operation. 
 Key parts such as engine, hydraulic system, and 
vibratory bearing of international famous brands. 
 Combination of industrial model and engineering 
design with bright color and nice appearance. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 3
1.2 Technical Parameters 
See Table1-1 for details of the main technical 
parameters. The parameters with * in this table are 
those of diesel engine’s (Cummins) configuration. 
 
 
 
 
 
 
 
Table1-1 Main Technical Parameters 
 
 Model
Technical Parameters YZC10C YZC11C YZC12C YZC13C 
Operating mass cab, kg 10800 11500 12500 13000 
 Steer shed, kg 10400 11100 12100 12600 
Front drum module mass, kg 5350 5700 6200 6500 
Rear drum module mass, kg 5450 5800 6300 6500 
Front drum static linear load, N/cm 273 291 285 298 Pa
ra
m
et
er
s 
of
 
m
as
s 
an
d 
lo
ad
 
Rear drum static linear load, N/cm 278 296 289 298 
Vibration frequency, Hz 40 / 50 40 / 50 42 / 50 42 / 50 
Nominal amplitude, mm 0.75 / 0.37 0.82 / 0.39 0.75 / 0.37 0.81 / 0.39
Centrifugal force, kN 110 / 70 120 / 75 130 / 85 140 / 90 
Vibratory drum diameter, mm 1248 1248 1250 1250 
Vibratory drum width, mm 1920 1920 2135 2135 Pa
ra
m
et
er
s 
of
 
co
m
pa
ct
io
n 
m
ec
ha
ni
sm
 
Wheel rim thickness of vibratory drum, mm 19 19 20 20 
Travel speed High speed, km / h 0~12 0~12 0~12 0~12 
 Low speed, km / h 0~5.5 0~5.5 0~6.5 0~6.5 
Theoretical gradeability Vibration, % 42 38 35 30 
 Non vibration,% 45 42 40 35 
Min. ground clearance, mm 400 400 400 400 
Wheel base, mm 3280 3280 3280 3280 
Steering angle ±35° ±35° ±35° ±35° 
Vertical oscillation ±10° ±10° ±10° ±10° 
Min. turning external diameter, mm 12240 12240 12460 12460 
Crab type travel distance, mm ±170 ±170 ±170 ±170 Pa
ra
m
et
er
s 
of
 p
ow
er
-d
riv
in
g 
pe
rfo
rm
an
ce
 
Length × width × height, mm 5000×2120×3000 5000×2350×3000 
Supplier Deutz Deutz Deutz Deutz 
Model BF4M1013 BF4M1013 BF4M1013 BF4M1013
Rated rotary speed, r / min 2300 2300 2300 2300 En
gi
ne
 
Rated power, kW 88 88 88 88 
Battery, V×Ah 24×100 24×100 24×100 24×100 
Water tank, l 2×480 2×480 2×480 2×480 
Fuel tank, l 200 200 200 200 
Capacity 
parameters 
Hydraulic oil tank, l 110 110 110 110 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 4 
1.3 Function Description 
1.3.1 Frame Assembly 
The structure of the front frame is shown in Fig. 
1-2. 
The frame is subdivided into front frame and rear 
frame. The front and rear frames are connected with 
the central articulation frame as an integral articulation 
body to support the upper structure of the machine. 
The front frame assembly comprises front frame 
body, fuel tank and mud scraper. It is mainly used to 
support the cab and front water box. The fuel tank is 
composed of two detachable parts whose bottoms are 
connected by a hose, and with oil filler on the left side. 
The mud scraper is used to scrape foreign materials 
stick on the vibratory drum. The spring device between 
the mud scraper and drum can compress automatically 
without adjustment. 
In order to reduce the unfavorable influences on 
drivers from vibration, a cushion block is set between 
the front frame and cab. 
The rear frame assembly comprises rear frame 
body, mud scraper, etc. It is mainly used to support the 
engine, hydraulic oil tank, and rear water box, etc. 
[Fig.1-3]. 
An elastic cushion block is set between the 
engine and rear frame. It also makes it easier to adjust 
the engine to the horizontal position. 
In order to conveniently secure the roller on the 
transfer vehicle during installation and transportation, 
four shackles are set on the front and rear frames. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig.1-2 Front Frame 
Fig.1-3 Rear Frame 
Upper mud 
scraper Lower mud scraper
Lower mud scraper 
Rear frame 
welding part 
Upper mud scraper Turn lamp 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 5
1.3.2 Central Articulation Frame 
The front frame and rear frame are connected by 
the central articulation frame as an integral part. It 
comprises articulation seat, coupling support, steering 
cylinder, crab-walk cylinder, slewing frame and slewing 
bearing, etc. [Fig.1-4]. By the central articulation frame, 
the steering of the machine and side-to-side oscillation 
of front frame can be achieved. The maximum 
difference of longitudinal centre lines between the front 
and rear vibratory drum is 170mm. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Oscillation: The double drum vibratory roller allows a 
certain vertical relative oscillation between the front and 
rear frames with an oscillating angle of ±8°. Therefore, 
the roller can travel stably on the uneven road surface. 
To make maintenance easier, the imported spindle 
bearing with self-lubrication and centripetal joint is 
used. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig.1-4 Central Articulation Frame 
Crab-walk cylinder Slewing frame Slewing bearing 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 6 
1.3.3 Vibratory Drum Assembly 
The vibratory drum assembly [Fig.1-5] comprises 
vibratory drum body (contact roller), shaft, amplitude 
modulation apparatus, cushion block, driving motor, 
vibratory motor, elastic coupling, vibratory bearing, 
traveling support, bearing seat, plum blossom plate, left 
and right fork feet, etc. 
The vibratory drum body is composed of wheel 
rim rolled with Q345A steel plate and spoke plate 
welded onto it. The smooth and flat external surface of 
the wheel rim and the even wall thickness ensure a 
uniform vibratory compaction and render a function of 
static compaction. 
The vibratory bearing is mounted in the inner 
holes of spoke plates at the left and right ends of the 
vibratory drum. In view of the high requirement for 
coaxiality between the inner holes of spoke plate, you 
must use the special SANY vibratory drum process 
equipment to ensure the coaxiality. 
The bearing seat, vibratory bearing, vibratory 
shaft, amplitude modulation apparatus and elastic 
coupling are installed in the vibratory drum body. The 
chamber is filled with gear oil to lubricate and cool the 
vibratory bearing. 
The rubber cushion blocks are set between the 
vibratory drum and front frame to insulate the frame 
from the vibration of vibratory drum.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1-Fork foot 2-Contact roller 3-Traveling support 4-Vibratory bearing 5-Amplitude modulation 
apparatus 6-Shaft 7-Reducer 8-Cushion block 9-Driving motor 
Fig.1-5 Structure of Vibratory Drum Assembly 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 7
 
Amplitude Modulation Apparatus 
The amplitude modulation apparatus is a sealed 
column welded component. It mainly comprises 
movable eccentric mass, fixed eccentric mass and 
retainer pin. Its schematic diagram is shown in [Fig.1-6]. 
The rotation direction of the vibratory shaft is changed 
through changing the rotation direction of vibratory 
motor. With the help of retainer pin, the fixed eccentric 
mass and movable eccentric mass overlap or 
counteract each other to change the eccentricity of the 
vibratory shaft, so as to achieve high amplitude and low 
amplitude and realize amplitude modulation. 
 
 
1.3.4 Spraying System 
Function: The spraying system and mud scraper 
can effectively prevent drums from stick asphalt and 
other foreign materials. 
Structure: The spraying system comprises water 
pump, spraying control switch, three-stage filter, front 
and rear water boxes, pipeline and water level alarm 
[Fig.1-7]. 
 
 
The pressure spraying system is subdivided into 
two sets of independent spraying systems (front and 
rear). Each system is provided with two pumps sharing 
a pipeline. In the event that one pump is defective, you 
can just connect the cables with the other pump to turn 
to the use it for water supply. [Fig.1-8] 
The spraying system sprays water under the 
action of pressure. One water box, made of molded 
glass fiber reinforced plastic and with a capacity of 
480L, is respectively set at the front and rear sides. The 
driver can see the spraying points clearly in the cab 
and spray water according to specific conditions. 
The pressure spraying has two modes, namely, 
fixed spraying flow and adjustable spraying flow control. 
You can operate the knob controller for stepless 
spraying flow adjustment in the latter mode. 
The hi-precision three-stage filter and new-typed 
nozzle effectively prevents the nozzle from blockage, 
reduces maintenance frequency and times and 
improves the reliability of operation. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig.1-8 Spraying System 
Fig.1-6 Amplitude Modulation Apparatus 
Fluid
Fig.1-7 Schematic Diagram for 
Spraying Pipeline 
 
Water 
box 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 8 
1.3.5 Cab and Control System 
With special appearance design and in full 
considerationof operational comfort of man-machine, 
the cab makes the operation comfortable and reliable, 
features beautiful and tasteful appearance, elegant and 
bright interior trimming, renders broad visual field, and 
offers international first-class practicability. During the 
course of driving, the driver can see the surface of the 
front and rear drums conveniently, which is favorable 
for compaction work. The operable small door set in 
the cab not only facilitates compaction at curb, but also 
helps in ventilation. Besides, the door is also provided 
with a special anti-collision device. When carrying out 
compaction at curb, drivers can lean against the 
specially-designed cushion comfortably and poke their 
heads out to check the compaction. In addition, the cab 
is air-conditioned and with full sealed damping 
structure. 
The integral console can rotate and slide leftward 
and rightward. This enlarges the visual field and 
facilitates the observation and compaction at curb. See 
[Fig.1-9]. 
 
 
1.3.6 Safety Protection Device 
The SANY full hydraulic double drum vibratory 
roller is equipped with perfect and complete safety 
protection device: 
Articulating fixed safety rod: it is used to secure 
the articulation frame when loading and unloading the 
machine for delivery or parking it for a long time; 
Starting locking device: when the traveling handle 
of the machine is set at the traveling gear but without 
returning to neutral position, the engine can’t be 
started; 
Emergency brake device; 
Steering indicator lamp; 
Automatic protection device of covering parts: the 
gas spring with protective sleeve can prevent the 
covering parts from accidental falling. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig.1-9 Rotary Console 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 9
1.4 Engine 
The power device supplies power for each part 
of the roller. Generally, the vibratory roller adopts 
diesel engine as the power unit. 
The detailed structure of the power device of 
double drum vibratory roller is shown in Fig. 1-10. 
A DEUTZ BF4M1013 turbocharged water-cooled 
diesel engine is adopted for the double drum 
vibratory roller. It features good reliability, fuel 
economy, low noise and low emission, which 
completely meet the requirements of EPA standard. 
According to the customer demands, the 
4BTA3.9 turbocharged water-cooled diesel engine 
(Cummins) also could be equipped in the double 
drum vibratory roller. Some parameters of the two 
types of diesel engines are shown in Table 1-2.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
5
7
9
10
11
6
5
7
2
11
3
1 4
8
9
10
1-Diesel engine 2-Air intake device 3-Exhaust device 4-Aerofoil 5-Coupling device 6-Double pump 
7-Throttle control 8-Double diesel secondary filter 9-Diesel primary filter with oil water separator 
10-Oil drain device 11-Steering pump 
Fig. 1-10 Structure of Power Device 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 10 
 
 
 
 
Table 1-2 Diesel Engine Parameters
 
The power device comprises the 
following parts: 
1.4.1 Air Intake System 
The air intake system provides clean and dry air 
of appropriate temperature to the engine for 
combustion, so as to minimize the abrasion of 
engine and ensure the optimized engine 
performance. Besides, this system effectively filters 
the dust away during the reasonable maintenance 
interval accepted by users and keeps the intake 
resistance within the limit value. 
The air intake system is simple but effective. All 
air filters are two-stage dry-type air filters, with a 
cleaning efficiency of 99.9%. During the first stage, 
the larger dust is separated under the effect of 
centrifugal force and collected in a rubber container. 
You must periodically remove the collected dust. 
During the second stage, the rest dust is filtered by a 
paper filter element. The air filter is of sufficient dust 
capacity, so you may replace the filter element within 
a reasonable interval. Once the filter element is 
blocked by dust, the intake resistance will increase 
and the air volume taken into engine will decrease, 
and accordingly, the engine power may be affected. 
Thus, you must periodically clean or replace the air 
filter element in accordance with the engine 
maintenance requirements. See [Fig.1-11]. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Manufacturer DEUTZ Cummins 
Engine model BF4M1013 4BTA3.9-C125 
Engine type 
Turbocharged water-cooled diesel 
engine 
Turbocharged water-cooled diesel 
engine 
Rated power 88kW 93kW 
Rated rotation speed 2300rpm 2200rpm 
Max. torque 438N•m (1400r/min) 475N•m (1400r/min) 
Qty of cylinder 4 cylinders 4 cylinders 
Displacement 4.76L 3.9L 
Oil consumption 229g/Kwh 229g/Kwh 
1
33
32
3
1
1-Mounting rack 2-Air filter 3-Air pre-filter 
Fig. 1-11 Air Intake System 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 11
1.4.2 Exhaust System 
 
The exhaust system not only ensures the 
optimized engine performance, but also discharges the 
exhausted gas into the atmospheric air quietly. The 
exhaust system of double drum vibratory roller 
comprises heat telescopic tube, muffler and exhaust 
tube. See [Fig. 1-12]. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4
1
4
3
2
1
1-Heat telescopic tube 2-Connecting tube 3-Muffler 4-Exhaust tube 
Fig. 1-12 Exhaust System 
 CHAPTER 1 TECHNICAL SPECIFICATION 
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 12 
1.4.3 Fuel System 
The fuel system of the engine mainly comprises 
fuel tank, oil tube, oil water separator and fuel 
secondary filter. 
(1) Fuel Tank 
The fuel tank is mounted at the rear of the front 
frame. It is composed of two detachable parts whose 
bottoms are connected by a hose, with oil filler on the 
left side. A cleaning port is set at the side face of the 
fuel tank. You can periodically clean the tank by this 
port. An oil-drain bolt is set at the bottom of the tank. 
You can use it to drain the accumulated water and dirt. 
A filter grill is set at the oil filler to filter the larger 
grains in the oil. 
(2) Oil Tube 
The oil-in and oil-return tubes of fuel circuit are 
made of self-clasping oil-proof pressure-proof hoses. 
As the Deutz engine adopts the single pump which 
holds the large oil-in and oil-return volumes, the 
diameter of its oil-in and oil-return tube should be 
respectively more than 12mm and 10mm. If the length 
of oil tube exceeds 3m, you must use the tube with 
greater diameter. As the Cummins engine employs the 
in-line pump or rotor pump, its oil-in and oil-return 
volumes are less than that of Deutz engine. Still, we 
adopt the self-clasping hose with the same tube 
diameter as that for Deutz. Such a tube will not be 
damaged or crushed in the event of considerable 
vacuum. 
(3) Oil Water Separator and Fuel Filter 
The fuel, more or less, contains moistures and 
impurities. This may lead to premature abrasion of 
engine and oil conveyer, and then cause faults in 
engine such as black smoke emission and abnormal 
stalling. Therefore, an oil water separator and a fuel 
filter are set in the fuel circuit to prevent the moisture 
and impurity form entering the fuel system. 
The fuel will encounter some resistances when 
passing the oil water separator and fuel filter. Thus, the 
oil water separator and fuel filter should satisfy the 
limited pressure value ofdiesel engine’s oil circuit. 
Once the resistance of oil circuit system exceeds the 
limit value of engine, the engine power will be 
insufficient. Therefore, you must drain the water in oil 
water separator daily and replace the fuel filter element 
periodically. 
 
1.5 Electrical Control Devices 
1.5.1 General 
The electrical system of the double drum vibratory 
roller is a functional extended platform with a certain 
remoter monitoring ability. It is based on SIEMENS 
S7-200 as the control core and TD400 text display and 
alarm lamp as the man-machine interface. It can 
supply the power system, traveling system, vibratory 
system and spraying system with corresponding 
control and protection to achieve constant engine 
speed control, multi-mode vibration control, intelligent 
spraying control and three-grade brake parking 
automatic control. It satisfies the technical requirements 
of high-standard road construction and ensures 
effective and safe operation of the system. 
The electrical system comprises battery, starter 
motor, generator, PLC, lighting lamps, electric 
instruments, display, safety protection elements, 
acoustic-optic alarming devices, an automatic/manual 
vibration device (with two gears for frequency selection) 
and an automatic/manual flow adjusting spraying 
system. In addition, windscreen wipers are set at the 
front and rear of the air-conditioned cab. The system 
has a voltage of 24V. It is negative earthed and adopts 
single-wire system. The starter motor, generator, linear 
step motor, PLC, display, instruments, lighting lamps, 
various sensors and other electrical elements are all 
manufactured by world-renowned companies. The 
configuration of the whole electric appliance system is 
up to the international advanced level. The mating of 
each element has been precisely calculated and 
subjected to endurance test, which renders the system 
high reliability, long life and high efficiency. 
 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 13
1.5.2 Cab Electrical System 
In order to ensure safe traveling, improve the driving 
comfort level, some auxiliary electrical appliances are set 
in the cab. These comprises upper beam lamp, lower 
beam lamp, left turn lamp, right turn lamp, horn, front 
windshield wiper and washer, rear windshield wiper, inner 
lamp, radio recorder and air conditioner. See [Fig. 1-13]. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The front and rear working lamps are respectively 
controlled by a knob switch on the instrument panel. 
The upper beam lamp switch also offers instrument 
background illumination at night. The front and rear 
turn lamps provide indication and warning for turning 
and parking. They are respectively controlled by knob 
switches S11/S19. The inner lamp provides the night 
illumination for the cab. 
The air conditioner equipped in the double drum 
vibratory roller has two modes: heating and 
refrigeration. It can be controlled directly by the control 
panel at the left side of the driver’s seat base. Its control 
panel is shown in [Fig. 1-14]. Please refer to the Use of 
Air Conditioner for the use and maintenance of air 
conditioner. 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 14 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The radio recorder installed on the double drum 
roller has such characteristics as two receiving 
wavebands of AM/FM, automatic receiving and saving 
functions, clear and fruity sound. As the radio recorder 
is mounted at the right front of the cab roof, the driver 
can operate it directly through the radio recorder control 
panel. The function of the control panel is shown in [Fig. 
1-15]. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig.1-14 Air Conditioner Control Panel 
Air volume switch 
Indicator lamp 
Temperature control switch 
1 2 3 4
8
9
2 3 35 36 410
1-Power supply 2-Sound effect 3-Previous 4-Next 5-Automatic saving 6-Band 
7-Preset 8-Volume up 9-Volume down 10-Crystal screen 
Fig.1-15 Radio Recorder Operation Panel 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 15
 
 
(1) You must cut off the power before replacing bulb or 
other power terminations. Besides, you must use the 
one of original model and trademark, as otherwise it 
will cause unexpected damage. 
(2) Only when the engine is started, can the air 
conditioner be operated and used effectively. 
 
 
1.5.3 Engine Electrical System 
The engine electrical system provides the 
complete vehicle with power, and controls the starting, 
parking and the engine speed. It mainly comprises 
ignition switch, DC contactor, battery, starter motor, 
generator, oil cut-off electromagnet, linear step motor. 
The schematic diagram is shown in [Fig.1-16]. 
Before starting the engine, make sure the 
traveling handle, emergency stop switch S12 and 
vibration control switch S16 have been reset to the 
neutral position. Insert the switch key and turn it right to 
the working position. At this moment, the charging 
indicator lamp, alarm indicator lamp and neutral 
position indicator lamp are lit up, while other indicator 
lamps are off. It indicates the circuit is normal and gets 
ready for starting. Then, turn the key right to the starting 
position to ignite and start the engine. After that, 
release the key immediately and have it return to the 
working position automatically. After that, the machine 
is started. 
The default setting for engine speed control is 
“manual” adjustment. The engine speed is controlled 
by the throttle switch S2 on the instrument panel. The 
engine speed decreases when the switch is turned to 
left and increases when it is turned to right, with an 
adjustment range of 750rpm-2450rpm. When the 
engine speed control is set as “automatic” in the 
function setting menu on the display, the engine will be 
under constant engine speed control. In this case, the 
engine speed will automatically adjust according to 
different work conditions, with a deviation of ±25rpm. 
For the static compaction state, the engine speed can 
automatically adjust to 2100rpm; for the transfer to 
other worksites, the engine speed can automatically 
adjust to 2200rpm; and for the vibration state, the 
engine speed can automatically adjust to 2300rpm. 
Moreover, 10 seconds after the traveling handle 
returning to the neutral position, the engine speed can 
automatically return to an idle speed of 850rpm. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Caution 
Caution 
 When starting the engine, you must set the 
traveling control handle and vibration 
control switch to the neutral position. 
 Before starting the engine again, you must 
turn the key to “off” position first. 
 The engine starting time should not exceed 
10s. Wait for at least 3min before starting 
the engine again. If you fail to start the 
engine for three times successively, you 
must stop starting, find out the cause and 
rectify the trouble. 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 16 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig.1-16 Schematic Diagram for Engine Electrical System 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 17
 
1.5.4 Monitoring Electrical System 
The system can display, at real time, such 
parameters as engine speed, accumulated working 
time, coolant temperature, traveling speed and fuel 
level. Besides, it provides indication or warning for the 
neutral working positionof traveling pump, oil fill 
pressure, engine oil pressure, air filter pressure and 
water level in water box. Furthermore, the system 
supplies the man-machine interfaces to realize all kinds 
of actions or commands. 
It mainly comprises TD400 text display, water 
thermometer, fuel gauge, neutral position indicator 
lamp, charging indicator lamp, crab-walk indicator lamp, 
combined alarm indicator lamp, traveling handle and 
various control switches, etc. 
TD400 text display [Fig. 1-17] can display such 
parameters as engine speed, accumulated working 
time and traveling speed at real time. You can set the 
time, switch the manual/automatic engine speed 
control mode, and switch the continuous/intermittent 
spraying control mode on the display. Besides, you can 
find text alarm information about blocked air filter, low 
engine oil pressure, water shortage in water box and 
low brake pressure on the display. The water 
thermometer monitors the engine’s coolant 
temperature with an indication range of 0-120 . The ℃
fuel gauge indicates the fuel level in fuel tank with an 
indication range of 0-1/1. The charging indicator lamp 
alarms for charging fault and supplies the engine with 
initial exciting current. The crab-walk indicator lamp 
indicates whether the drum is in the crab-walk position. 
In the event of blocked air filter, low engine oil pressure 
or water shortage in water box, the combined alarm 
indicator lamp will flash at a frequency of 1Hz. However, 
it will be always on when warning against low brake 
pressure. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig. 1-17 Text Display 
 
 
 
 
 
 
 
 
 
 
 
 
Text display area 
Configurable key Function shift key Confirm 
key 
Menu key 
Arrow key 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 18 
 
Key Function Purpose 
ENTER Select and confirm 
Select the menu or confirm the 
value on the display 
ECS Escape 
Exit from the menu or cancel the 
selection 
 Move the cursor up/down 
Scroll display the menu options 
upward/downward, or 
progressively increase/decrease 
the value 
 Move the cursor left/right 
Move the cursor left/right, or 
display the value 
 
Function keys F1~F8 
Implement the tasks configured by 
“Text display guide” 
 
Function keys F9~F16 
SHIFT function keys (F9~F16) on 
TD400C display can implement the 
tasks configured by “Text display 
guide” 
 
 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 19
 
Table 1-1 Meanings of Symbols on Display 
 
Turn lamp switch 
 
Manual/automatic 
selection switch 
 
Charging indicator lamp
 
Water temperature alarm
 
High-frequency vibration
 
Vibration frequency 
selection switch 
 
Low-frequency vibration
 
Engine oil pressure 
alarm 
 
Brake pressure 
 
Air filter alarm 
 
Neutral position indicator 
lamp 
Spaying control switch 
 
Front windshield wiper 
 
Gear-shift switch 
 
Rear windshield wiper 
 
Headlamp switch 
 
Manual brake 
 
Rear lamp switch 
 
Crab-walk indicator lamp
 
Horn 
 
Alarm indicator lamp 
 
Washer switch 
 
Water shortage indicator 
lamp 
Vibration mode selection 
switch 
 
 
 
 
 
 
 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 20 
 
 
 
 
 
 
 
 
 
 
23
L
 
 
 
 
1-Front working lamp switch 2-Spraying flow adjusting knob 3-Horn switch 4-Spaying control switch 
5-Charging indicator lamp 6-Fuel level gauge 7-Vibration control switch 8-High/low frequency change-over 
switch 9-Great-shift switch 10-Neutral position indicator lamp 11-Vibration mode selection switch 12-Text 
display 13-Crab-walk control switch 14-Crab-walk indicator lamp 15-Engine speed control switch 16-Coolant 
thermometer 17-Alarm indicator lamp 18-Emergency stop switch 19-Turn indicator switch 20-Manual brake 
switch 21-Key switch 22-Rear working lamp switch 23-Traveling control handle 24-Vibration button switch 
 
Fig. 1-18 Control Device 
 
 
 
 
 
 
 
 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 21
 
Text Display Operation 
When the key switch is turned to position “I”, and 
the host computer is energized, the backlight of text 
display will be lit up and the system will be initialized. In 
this case, the computer is started. In 5s, the startup 
interface of “SANY Heavy Industry Quality Changes 
the World” flashes. After another 5s, the language 
selection interface appears. Press F1 to choose 
Chinese version and F3 to choose English version and 
press the corresponding function key for confirmation. 
If you do not select any option, the system will skip this 
process automatically and acquiesce in the previous 
operation. After that, the main interface appears. Press 
F1 to choose operation description, F2 to choose 
real-time parameters, F3 to choose function setting. 
3s after startup of the engine, the text display will 
automatically shift to the “Real-time Parameters” 
interface from the main interface. It enters into 
monitoring state to show such parameters as working 
hours, traveling speed, engine speed, fuel level and 
coolant temperature. Pressing the to exit the 
interface and press the to enter the alarm indication 
interface for checkup. 
If the alarm information appears during operation, 
such as blocked air filter, too high coolant temperature, 
too low engine oil pressure and water shortage in water 
box, the text display will immediately shift to the “Alarm 
Indication” interface from the current interface. You can 
find the relevant alarm figures and the alarm indicator 
lamp on instrument panel will flash. 
On the main interface, you can press ”ENT” to 
enter the time setting mode. Press the left or right 
arrow key to choose the value you want to set, and 
press up or down arrow key to set the value. After 
setting, press “ENT” and “F4” synchronously for 
confirmation (letter ‘T’ beside the clock will become ‘S’). 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1.5.5 Traveling and Brake Control System 
The traveling and brake control system controls 
the traveling speed and brake of the double drum 
vibratory roller. It also sends the speed signal detected 
by the speed sensor to the controller for constant 
traveling speed control. 
It mainly comprises gear shift valve, brake valve, 
brake release valve, crab-walk valve, pressure relay 
and speed sensor. The circuit diagram is shown in 
[Fig.1-19]. 
When the engine runs at a speed over 1000rpm, 
push the traveling handle off the neutral position, then 
the PLC will get the traveling command and output a 
high level signal into the relay to drive the 
electromagnetic valve Y1. In this way, the machine 
begins traveling at a speed of 0m/min-110m/min. 
When transiting to another worksite at a high speed, 
turn on the gear switch, and then the PLC will output a 
high level signal into the relay to drive the 
electromagnetic valves Y3 and Y5. In this way, the 
traveling motor will run at a high rotation speed but 
small displacement, and the traveling speed will be 
0m/min-200m/min. When you wish crabbing upon the 
requirements of working conditions, gently turn the 
crab-walk switch on the handle S13 forward or 
backward by hand, then the electromagnetic valve Y10 
or Y11 will be energized for left or right crabbing. 
1. Service braking: this part has already been 
introduced under Hydraulic System. 
2. Parking braking: when the switch S19 is turned 
on, the brake valve Y4 will be de-energized. Then the 
machine stops and its brake takes effect. 
Caution 
• All elements and devices on the 
instrument panel are precise 
instrument. You must not beat or tap 
them with hard object and you must 
keep the surfaceclean. 
• You must keep the terminals of all 
sensors clean and dry. Meanwhile, 
check each terminal for looseness. 
The loose terminal may affect the 
correct and stable indication of the 
instruments.
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 22 
3. Emergency braking: when the emergency stop 
switch S12 is pressed, all electromagnetic valves will 
be de-energized, resulting in the stopping of vibration 
and spraying, meanwhile, the machine stops and its 
brake takes effect immediately. 
 
1.5.6 Vibration Control System 
The vibration control system controls the 
automatic or manual start/stop of vibration, the switch 
of the high/low vibration frequency and the vibration of 
the front/rear drums. It mainly comprises 
electromagnetic valve Y8/Y9 for the flow cut-off of 
vibration pump and electromagnetic valve Y6/Y7 of 
vibratory switch valve. The circuit diagram is shown in 
[Fig. 1-19]. 
Turn the vibration control switch S16 to “Manual” 
and press the button switch S17 on the traveling 
handle, then the PLC will get the commands of forced 
vibration. At this moment, if the frequency selection 
switch S18 is at the initial position, the high-frequency 
vibration electromagnetic valve Y8 will be energized 
and the machine will vibrate at high frequency; 
contrarily, if the switch S18 is turned on, the machine 
will vibrate at low frequency. Press the switch S17 
again, then the machine will stop. Turn the switch S16 
to “Automatic”, the machine will vibrate automatically 
when the traveling speed ≥25m/min, or stop vibration 
when the speed ＜25m/min. If you want to stop 
vibration ahead of schedule, you can press the switch 
S17 for stopping the vibration forcedly. Under particular 
circumstance, if you wish single drum vibration, you 
can turn the mode selection switch S15 left to have the 
front drum vibrate; turn it right to have the rear drum 
vibrate. If you turn the switch at neutral position, both 
the front and rear drums will vibrate at the same time. 
 
 
 
CHAPTER 1 TECHNICAL SPECIFICATION 
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 23
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1.5.7 Spraying Control System 
The spraying control system controls the spraying 
mode (Manual/ Automatic), adjusts the spraying flow in 
proportion manually and detects for water shortage in 
water box. It mainly comprises DC pressure regulator 
A3, water cut-out electromagnetic valve Y12, water 
pumps M8/M9 and liquid level switch S7. See [Fig. 
1-20]. 
Turn the spraying control switch S14 to “Manual”, 
then the DC pressure regulator A3 will be energized 
and begin to work. It will output a PWM current signal 
to drive the water pump M8/M9. When the switch S14 
is turned to “Automatic”, once the traveling control 
handle is off neutral position, the PLC will output a low 
level signal and the relay K4 will reset. In this case, the 
DC pressure regulator A3 is energized and begins to 
work. That is to say, the spraying will start automatically. 
When the traveling handle is at neutral position, the 
relay K4 is energized, the regulator A3 is de-energized, 
and the spraying will stop. Turn the knob of 
potentiometer RP1 to adjust the spraying flow 
steplessly, so as to satisfy different construction 
technical requirements. Under particular circumstance, 
you can select “intermittent spraying” in the function 
setting menu on the display to have the water pump 
under intermittent mode. In this way, you can not only 
ensure the spraying effect, but also greatly reduce the 
water consumption and save water by about 50%. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig. 1-19 Circuit Diagram for Traveling and Vibration Control System 
 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 24 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig.1-20 Circuit Diagram for Spraying Control System 
Fig.1-21 Scbematic Diagram for Distribution Cabinet 
CHAPTER 1 TECHNICAL SPECIFICATION 
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 25
1.5.8 Basic Structure of Distribution Control 
Cabinet 
The distribution control cabinet is the control 
center of the whole electrical system. It realizes some 
required action, provides the PLC and sensors with the 
required regulated power and short circuit protection, 
supplies the communication interface for program 
uploading and downloading and renders a certain 
capacity of remote monitoring and data maintaining. It 
receives the signals from the operation system and 
sensors, and then processes (amplification, filtering, 
reshaping) and outputs them to the PLC module. After 
certain calculation, the signals from PLC will go through 
relays, amplifiers and drives to drive the correspondent 
loads to carry out the required actions. The distribution 
control cabinet mainly comprises drive H435, flasher 
relay, control relay, starter relay, circuit board assembly, 
central module CPU224, expansion module EM223. 
The element layout is shown in [Fig. 1-21]. 
1. Starter relay: a relay with a working voltage of 
12V-32V, a load capacity of 90A and a working 
temperature of -40℃-65℃; 
2. Circuit board assembly: a home-made part; 
3. Control relay: a relay with a working voltage of 
16V-30V, a load capacity of 30A-20A and a 
working temperature of -40℃-100℃; 
4. Central module CPU224: a module with 14 digital 
input and 10 digital output (including two 20kHz 
high-speed pulses output), a working voltage of 
20.4V-28.8V, a load capacity of 750mA, a logic “1” 
signal ＞15V and a working temperature of 
0℃-50℃; 
5. Flasher relay: a relay with a work voltage of 
16V-30V, a load capacity of 110W and a working 
temperature of -40℃-100℃; 
6. DC pressure regulator HSKQ-5/5A1: refer to 
Spraying Control System; 
7. Expansion module EM223: a module with 4 digital 
input/output, a working voltage of 20.4V-28.8V, a 
load capacity of 2.0A, a logic “1” signal ＞15V 
and a working temperature of 0℃-50℃; 
8. Expansion module 6ES7231-0HC22-0XA01: a 
module with 4 analog input; 
9. DC contactor ZLJM-100A1: a power control relay; 
10. Drive H435/H420: a step motor drive with high 
performance has a working voltage of 18V-32V, 
max. drive current of 3.5A, a responding 
frequency of 200kHz and a working temperature 
of 0℃-50℃. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 26 
1.6 Hydraulic Control Devices 
The double drum vibratory roller is a full hydraulic 
driven roller. Its hydraulic system mainly comprises four 
subsystems: traveling hydraulic system, vibration 
hydraulic system, steering hydraulic system and brake 
hydraulic system. 
1.6.1 Traveling Hydraulic System 
The traveling hydraulic system of YZC12C double 
drum vibratory roller adopts a parallel closed circle with 
one cam-type axial piston pump and two inclined-axis 
axial piston motors, see [Fig. 1-22]. In order to ensure 
the normal work of the closed circle, the system is also 
equipped with servo valve, multi-function valve 
(high-pressure overflow valve and one-way oil fill valve), 
pressure cut-off valve, oil fill overflow valve and flushing 
valve. 
The main functions of all valves above are as follows: 
1. Servo valve: you can turn the electric control 
handle to control the movement of the oil cylinder, 
so as to have the machine move forward, park 
and reverse. 
2. Multi-function valve: it comprises high-pressure 
overflow valve and one-way oil fill valve. When the 
main oil circuit pressure of the system exceeds the 
rated pressure ofthe high-pressure overflow valve, 
the valve overflows to protect the system element. 
Its rated pressure is 400bar. The one-way oil fill 
valve is used to fill oil to the side with lower 
pressure. By doing so, it may compensate the lost 
flow due to flushing of the flushing valve and 
leakage of the system to avoid air suction. 
3. Pressure cut-off valve: when the high-pressure 
overflow valve actuates continuously, the pressure 
cut-off valve will make the displacement servo 
cylinder swing towards the small displacement 
side. By doing so, it may avoid the oil temperature 
rising due to long overflow of the high-pressure 
overflow valve. Its rated pressure is 380bar. 
4. Oil fill overflow valve: it is used to keep the oil fill 
pressure of the system. Its rated pressure is 
24bar. 
5. Flushing valve: It is used to flush some hydraulic 
oil in the side with lower pressure of the main oil 
circuit into oil tank. It works with the one-way oil fill 
valve to keep the exchange of hydraulic oil in the 
main oil circuit. 
During operation, once the current and current 
direction of the driving pump electrical system is 
changed, the tilt angle of swashplate and the output 
flow and direction of the pump will be changed. 
Accordingly, the roller’s traveling direction and speed 
will be changed. The variable plunger motor controls 
the tilt angle of the inclined axis by the external control 
valve to achieve shift between the min. and max. 
displacement modes. In this way, the machine will have 
two stepless adjustable gears to meet the different 
operating requirements of traveling and compaction. 
1.6.2 Vibration Hydraulic System 
The vibration hydraulic system of YZC12C double 
drum vibratory roller adopts a serial closed circle with a 
cam-type axial piston pump and a cam-type axial 
piston motor, see [Fig. 1-23]. The function valve blocks 
integrated in the system and their functions are same 
as those in hydraulic driving system. We will not give 
more details here. 
By controlling the servo electromagnetic valve of 
vibratory pump, you can have two tilt angles of 
vibratory pump swashplate. Thus, the vibratory pump 
can output oil in different directions and flows. 
Subsequently, the vibratory motor can run in different 
direction and at different speed to drive the vibratory 
drum to vibrate at two different frequencies and 
amplitudes. Adjust the displacement limit screw on the 
servo cylinder of vibratory pump to adjust the output of 
pump, so as to adjust the vibration frequency of the 
vibratory drum. 
The vibration valve controls the shift between 
three vibration modes to meet the requirements of road 
compaction: front drum vibration, rear drum vibration 
and both front and rear drums vibration. The vibration 
valve mainly comprises valve body, cartridge 
electromagnetic change valve, flushing valve and 
one-way oil fill overflow valve. The cartridge 
electromagnetic change valve controls the main oil 
circuit to achieve front or rear drum vibration. The 
flushing valve flushes some hydraulic oil in the side 
with lower pressure of the main oil circuit into oil tank. 
The flushing valve works with the one-way oil fill valve 
to keep the exchange of hydraulic oil in the main oil 
circuit. The one-way oil fill overflow valve prevents the 
vibratory motor from overloading and air suction. 
CHAPTER 1 TECHNICAL SPECIFICATION 
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 27
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1-Oil fill pump 2-Oil fill overflow valve 3-Filter 4-Multi-function valve 5-Pressure cut-off valve 
6- Servo valve 7-Driving pump 8-Control valve 9-Reducer 10-Brake 11-Driving motor 
12- Flushing valve 
Fig.1-22 Schematic Diagram for Traveling System 
1-Vibration pump 2-Variable electromagnetic valve 3-Pressure cut-off valve 4-Multi-function valve 
5-Filter 6-Oil fill pump 7-Vibratory motor 8-Vibration valve 
Fig.1-23 Schematic Diagram for Vibration System 
 CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 28 
 
1.6.3 Steering Hydraulic System 
The steering hydraulic system of YZC12C double 
drum vibratory roller is an open circle with a max. 
working pressure of 140bar. It mainly comprises 
steering gear pump, full hydraulic steering gear, 
steering cylinder, crab-walk cylinder and priority valve, 
see [Fig. 1-24]. 
During working, the hydraulic oil from gear pump 
goes through the priority valve and then reaches the 
full hydraulic steering gear. After calculation by the 
steering gear, the oil is distributed to the steering 
cylinder to drive the articulation frame for steering. 
When the machine is not steering, the pressure oil at 
the LS port on steering gear drives the priority valve 
element to have the system under ready condition for 
crabbing. If the crab-walk valve doesn’t actuate, the 
hydraulic oil will directly flow into the hydraulic oil tank 
after passing the electromagnetic change valve with 
H-type neutral function to achieve unloading of the 
system. If the crab-walk valve is energized and 
actuated, the hydraulic oil will drive the crab-walk 
cylinder for crabbing.
 
 
 
 
1-Overloading overflow valve 2-Steering gear body 3-One-way valve 4-Two-way cushion overflow valve 
5-Steering cylinder 6-Crab-walk cylinder 7-Hydraulic lock 8-Crab-walk control valve 9-Priority valve 
10-Gear pump 
Fig.1-24 Schematic Diagram for Steering System 
CHAPTER 1 TECHNICAL SPECIFICATION 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
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1.6.4 Brake Hydraulic System 
In order to ensure safety working and traveling, 
the brake system applies three models: service braking, 
parking braking and emergency braking. 
(1) Service Braking 
Service braking adopts hydraulic brake which is 
performed by controlling the traveling control lever. 
When the traveling control lever is returned to the 
neutral position from the working position, the flow from 
the traveling pump to the traveling motor gradually falls 
down to zero, the traveling motor stops and then the 
roller stops. 
The deceleration of service braking depends on 
the time to turn the control handle to the neutral 
position. Service brake features stable braking and less 
impact on road surface, so it is often applied during 
steering. 
(2) Parking Braking 
A normal closed wet multiple disc brake is 
adopted in the planetary reducer. The machine 
releases the brake by the hydraulic oil in brake release 
system. When the traveling handle returns to the 
neutral position from the working position and the 
parking button is pressed after a moment or 
immediately, the brake release system will be unloaded, 
and the disc brakes in the front and rear reducer 
brakes will take effect. In this way, the parking brake 
ensures reliable braking and enhances the machine’s 
safety. 
(3) Emergency Braking 
Under any circumstance, once the emergency 
brake button is pressed down, the swashplate of the 
traveling pump resumes to the neutral position 
immediately and the hydraulic brake takes effect. At the 
same time, the brake release system is unloaded, and 
the front and rear reducers brake off. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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Full Hydraulic Double Drum Vibratory Roller Operation Manual 
Operation & Maintenance 
 
2.1 Starting the Equipment 
2.2 Check before Operation 
2.3 Operating the Working Device 
2.4 Cleaning the Equipment 
2.5 Maintenance Interval 
2.6 Checking the Bolts 
2.7 Checking the Functional Oil 
 
 
 
 
 
 
 
 
P31~56 
 
CHAPTER 2 OPERATION AND MAINTENANCEYZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 31
 
Chapter 2 Operation and Maintenance 
2.1 Starting the Equipment 
Before operating the roller, the drivers and 
personnel in charge shall carefully read this Manual 
and the relevant chapters in Diesel Engine User’s 
Guide. 
 
 
2.1.1 Check before Starting: 
 Carefully check all parts for looseness, and tighten 
them if necessary. 
 Make sure the storage battery and its terminals are 
in good condition. 
(1) Check the engine oil level (the filler port is shown in 
the figure) and fuel level (the fuel gauge is on the 
control penal). Select and fill the appropriate oil in 
accordance with the regulations. Discharge the air in 
fuel. 
 
 
 
 
(2) Check the coolant level, and fill some if insufficient. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Filler port 
Coolant level 
 CHAPTER 2 OPERATION AND MAINTENANCE 
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(3) Check hydraulic oil level (between 1/2-2/3 of the oil 
dipstick), and fill some if insufficient. 
 
 
 
 
 
 
 
 
 
 
 
 
 
(4) Check the air filter and remove the accumulated 
dust. 
 
 
 
 
 
 
 
 
 
 
 
 
(5) Check the fuel filter in accordance with the Engine 
User’s Guide. If necessary, clean it. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Hydraulic oil level 
Removing 
accumulated dust 
Fuel filter 
CHAPTER 2 OPERATION AND MAINTENANCE 
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(6) Make sure the crab-walk device is in good condition 
and the safety fixing rods on the front and rear frames 
are at the unlocked position (i.e., operating position). 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(7) Make sure the emergency brake is at the unlocked 
position. Make sure the steering and parking brakes 
are under normal condition. 
 
 
 
 
 
 
 
(8) Make sure the vibration control switch is at the 
neutral position. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Safety fixing rod 
Emergency brake 
Vibration control switch 
 CHAPTER 2 OPERATION AND MAINTENANCE 
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(9) Make sure the traveling handle is at the neutral 
position and the vibration button is at the vibration stop 
position (i.e., the button is not pressed down). 
 
 
 
 
 
 
 
 
 
 
(10) Make sure the spraying system is in good 
condition and the spraying control switch is at the 
neutral position. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Vibration button 
Spraying control switch 
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2.1.2 Starting 
 
(1) Turn on the main switch for power supply at the rear 
frame. To do this, you must pull the lever to the position 
as shown in the figure. After that, the whole machine 
will be energized. 
(2) Pull the throttle adjusting handle to the idle speed 
position. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(3) Insert the key switch, and turn it right to the working 
position. At this moment, the charging indicator lamp, 
low oil pressure indicator lamp, braking indicator lamp 
and neutral position indicator lamp are lit up, while 
other indicator lamps are off. Moreover, the display is 
under initialization, which indicates the circuit is normal 
and gets ready for starting. 
 
 
 
 
 
 
(4) Turn the key switch right to ”start” position to ignite 
the diesel engine. After that, immediately release the 
key to have it return to working position automatically. 
Then the starting work is done. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Main switch for 
power supply 
Key switch 
 CHAPTER 2 OPERATION AND MAINTENANCE 
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(5) After starting, set the throttle adjusting handle at idle 
speed position, and then run it at low speed for 3~5 min 
to warm the machine up. For the roller used for the first 
time or have been parked for a long time, run it at low 
speed for 5~10 min to warm the machine up (you can 
properly increase the engine speed for warming up in a 
cold days). After that, slowly adjust the throttle adjusting 
handle to the rated speed position. 
 
 
 
Precautions: 
① The engine starting time should not exceed 
10s. Wait for at least 3min before starting the 
engine again. If you fail to start the engine for 
three times successively, you must stop 
starting, find out the cause and rectify the 
trouble. 
② You must turn off the radio recorder first before 
turning on the power switch. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Caution 
If you want to start the machine with 
jumper cables, you must connect the negative 
terminal with the negative one, and the positive 
terminal with the positive one. Connect the 
earth wire (negative terminal) lastly and cut off 
the earth wire firstly. Otherwise, it may damage 
the electrical system. 
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2.1.3 Check after Starting with the Roller Running 
in Place 
(1) Check all indicator lamps as per the above 
diagrams for control device and monitoring 
device. 
(2) Check the oil pressure gauge. It shall indicate 
figures within 15s after starting. The value shall be 
higher then 0.05MPa. (If the engine is at rated 
speed, the value shall be higher than 0.4MPa. 
(3) After starting the engine, the charging indicator 
lamp will go out. The neutral position indicator 
lamp keeps on before the roller starts traveling. 
 
Precautions: 
When the ambient temperature is lower than 
-10 , ℃ you must take the following measures to help 
starting. After that, you can carry out starting as per the 
normal procedures. 
① Preheat the engine oil and coolant to 60~80℃. 
② Use diesel oil, engine oil, hydraulic oil and coolant 
applicable to low temperature environment. 
③ Take thermal insulation measures for storage 
battery, or use low-temperature storage battery or 
battery with enlarged capacity. 
2.2 Check Before Operation 
Pay attention to the following items when the roller 
is under normal operation: 
(1) During operation, no matter traveling at high/low 
speed, vibrating or compacting, you must keep 
the throttle at the full open position (namely, the 
rated speed position), or else the roller may run 
abnormally. 
(2) Check the engine oil pressure and temperature at 
any time. Shut down the machine for check 
should you find any abnormal condition. 
(3) Check the thermometer in hydraulic oil tank. The 
temperature indication shall not exceed 80℃. 
Shut down the machine for check if it exceeds 
that value. 
(4) Check all parts for looseness or abnormal sound. 
If any, shut down the machine for check. 
(5) Check the generator and other electric elements 
for overheating or burnt-out. If any, shut down the 
machine for check. 
(6) Check each system for leaks. If any, shut down 
the machine for check. 
 
2.3 Operating the Working Device 
After starting the engine, firstly make sure all 
working systems, control devices, monitoring 
instruments and displays are normal. After that, operate 
the roller according to following procedures. 
2.3.1 Engine Speed Control 
There are two modes for controlling the engine 
speed, namely, automatic mode and manual mode. 
Manual mode: You can operate the engine speed 
control switch on the panel for stepless engine speed 
adjustment (from idle speed to rated speed). 
Automatic mode: Under this mode, the engine 
speed can be automatically controlled accordingto 
different working conditions. For the static compaction 
state, the engine speed can automatically adjust to 
2100rpm; for the transfer to other worksites, the engine 
speed can automatically adjust to 2200rpm; and for the 
vibration state, the engine speed can automatically 
adjust to 2300rpm. Moreover, 4 seconds after turning 
the traveling handling to the neutral position, the engine 
speed can automatically adjust to idle speed. 
 
2.3.2 Traveling 
When the traveling control lever is put forward 
from neutral position, the roller will run forward; while it 
is drew back from neutral position, the roller will run 
backward. The distance between neutral position and 
traveling control lever forward or backward determines 
the traveling speed. 
Two gears are available to meet the requirements 
of different working conditions. Only under gear I, the 
working gear, can the roller carry out vibration and 
compaction. Under gear II, the traveling gear, the roller 
can travel at high speed but can’t vibrate. 
 
2.3.3 Braking During Traveling 
If you wish to park the machine, turn the traveling 
handle to the neutral position from traveling position, 
and then the brake takes effect (static pressure 
braking). The more rapidly you turn the handle, the 
shorter the braking time is. 
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2.3.4 Vibratory Compaction 
Before vibratory compaction, operate the high/low 
frequency selection switch to select a proper vibration 
frequency. After that, operate the vibration change-over 
switch to select automatic/manual vibration mode. 
There are two gears for vibratory 
compaction——low frequency and high frequency 
gears. 
 
 Low frequency gear: great vibration force, high 
amplitude and low vibration frequency; 
 High frequency gear: small vibration force, low 
amplitude and high vibration frequency. It is 
controlled by high/low frequency selection switch. 
Meanwhile, you must check the relevant 
indication of high and low frequency indication 
lamps. 
 Automatic gear: under the auto vibration mode, 
the vibration is controlled by the traveling speed: 
when the traveling speed is more than 25m/min, 
vibration starts; and when traveling speed is less 
than this value, vibration stops automatically. 
 Manual gear: under the manual vibration mode, 
the vibration is controlled by the vibration on/off 
button —when the button is pressed down, 
vibration starts; when the button is pressed down 
again, the button pops up and vibration stops. You 
must set the gear switch at low speed position 
before vibration. 
 
 
 
 
 
 
The vibration is classified into three modes. Under 
each mode, there are two frequencies and two 
amplitudes for selection. The vibration is controlled by 
vibration frequency selection switch and vibration mode 
selection switch. Meanwhile, you must check the 
relevant indication of high and low frequency indication 
lamps. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Front & Rear Drum Vibration 
 
 
 
 
 
Low frequency 
High frequency 
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Precautions: 
(1) Stop vibration completely before shifting vibration 
gear. After that, you can engage the desired gear. 
In order to prevent against inertial impact due to 
steering of the amplitude modulation apparatus, 
never switch between the high and low 
frequencies directly during vibration. 
(2) Select the appropriate vibration frequency and 
amplitude according to the thickness and types of 
pavement. 
(3) The vibration may be realized only when the 
machine runs at a low traveling speed. 
(4) Do not start vibration when the machine is in 
standstill. 
(5) Do not start vibration on hard road surface such 
as concrete. 
(6) Do not start traveling gearshift when the machine 
is not parked steadily. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Front Drum Vibration (Rear Drum doesn’t 
Vibrate) 
 
 
 
 
 
 
 
 
 
 
 
 
Rear Drum Vibration (Front Drum doesn’t 
Vibrate) 
 
 
 
 
 
 
 
 
 
 
 
 CHAPTER 2 OPERATION AND MAINTENANCE 
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2.3.5 Spraying 
The spraying system can be controlled under 
three modes, namely, stop, manual and automatic 
modes. Under the automatic mode, you can set the 
continuous spraying state and intermittent spraying 
state (stop for 3s and spray for 4s) on the text display. 
Under the manual mode, as long as the host 
computer is energized, the spraying device can 
continuously work under any working conditions. 
Besides, you can operate the adjusting knob for 
stepless spraying flow adjustment. 
Under the automatic mode, the spraying device 
can work only when the traveling handle is off the 
neutral position. You can also operate the adjusting 
knob for stepless spraying flow adjustment. In this way, 
you can not only reduce the operating times, but also 
save the water. 
 
Spraying Procedures: 
(1) Fill up the water tank (you must use filter grill for 
water filling). 
 
 
 
 
 
 
 
 
 
 
 
 
(2) Keep the front and rear spraying cut-off valves 
open.
Water filler 
Cut-off valve 
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(3) Turn on the key switch and then the machine will 
be energized. 
(4) Turn the spraying control switch to the “manual” 
position, and then the spraying system starts 
working. Turn the flow regulating switch to adjust 
the flow to the specified value. 
(5) Turn the spraying control switch to the “automatic” 
position and pull the traveling handle off the 
neutral position, and then the spraying system 
starts working. Turn the flow regulating switch, 
and then the nozzle will spray water to the drum in 
different water flows. You can adjust the flow to 
the desired value and keep the switch at the 
corresponding position. 
(6) Under automatic spraying mode, you can select 
the spraying mode (intermittent or continuous) on 
the text display. Under the “intermittent” mode, the 
system will spray water for 4s and stop spraying 
for 3s. Under the “continuous” mode, the system 
will spray water continuously. 
Precautions: 
① Normally, we suggested “Automatic + Continuous 
Spraying” mode. It is easy for operation and 
effective in saving water. In specific cases, if you 
want an even spraying effect without too much 
spraying flow, you can apply “Intermittent 
Spraying” mode. 
 ② Water Level Alarm: when the water shortage 
alarm indicator on the text display flashes, the 
remaining water in the water box is enough for 
5~10m of operation only. You must fill water as 
soon as possible. The alarm indicator is: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Caution 
(1) During the short-term shutdown, the 
electromagnetic valve in pipelines can keep the 
nozzle free of dripping water. 
(2) In cold days, you must open the water filter 
to drain the remaining water in the system, as 
otherwise, the pipes may be frozen and 
damaged. 
(3) No water should enter the water pump 
housing, as otherwise the water pump and 
motor will be damaged. 
(4) Frequently check and clean the filter element 
and the grill in nozzle. 
(5) Never fill the water containing acid, alkali 
and pollutants into the water box, as otherwise 
the system will be damaged. 
(6) Do not remove the filter grill at the water box 
inlet when filling water. 
 CHAPTER 2 OPERATION AND MAINTENANCE 
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2.3.6 Parking 
(1) Stop vibration, and turn the vibration control switch 
to the neutral position (under the automatic 
vibrationmode, you don’t need to stop vibration 
separately). 
(2) Push the traveling control lever slowly to the 
neutral position to stop traveling. 
(3) Stop spraying and turn the spraying control switch 
to the neutral position. 
(4) Turn the throttle adjusting handle to idle speed 
position, and run the engine at a slow speed for a 
while, so as to let the roller cool down gradually. 
(5) Turn the ignition key left to the neutral position, 
switch the engine off, and then all indicator lamps 
will be off. 
(6) Cut off the power supply. 
(7) Place a timber block or rock block under the 
vibratory drum if necessary. 
(8) If the roller is to be parked for a long time, tightly 
cover the console without cab structure. 
2.3.7 Text Display 
The roller is equipped with Siemens text display 
TD400. It can display some system parameters, alarm 
information, and it supports function setting. The control 
penal is shown as follow: 
 
 
 
 
 
 
1-Text display area 2-Arrow key 3-Configurable key 4-Function shift key 5-Confirm Key 
6-Menu Key 
Fig.1-14 Text Display 
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Key Function Purpose 
ENTER Select and confirm 
Select the menu or confirm the value on the 
display 
ESC Escape Exit from the menu or cancel the selection 
 Move cursor (up/down) 
Scroll display the menu options 
upward/downward, or progressively 
increase/decrease the value 
 Move cursor (right/left) Move the cursor left/right, or display the value
 
Functional keys F1~F8 
Implement the tasks configured by “Text 
display guide” 
 Functional keys F9~F16
SHIFT function keys (F9~F16) on TD400C 
display can implement the tasks configured 
by “Text display guide” 
 
 
 
The interface of TD400 can be classified 
into several kinds as follows: 
 
(1) Startup Interface 
When the key switch is turned to position “I”, 
and the host computer is energized, the backlight 
of text display will be lit up and the system is 
initialized. About 3s later, the startup interface of 
“SANY Heavy Industry Quality Changes the 
World” flashes, as shown in the right figure. 
 
 
 
(2) Main Interface 
After the startup interface, the text display will 
automatically shift to the main interface. 
In the main interface, you can perform the 
operation according to the prompt in the Text 
Display Area. 
F1: check real-time parameters 
F2: shift between English and Chinese 
versions 
F3: Function setting 
F4: System setting 
 
 
 
 
 
 
 
 CHAPTER 2 OPERATION AND MAINTENANCE 
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(3) Real-time Parameter Interface 
In 3s after the startup of engine, if you do not 
select any option, the text display will automatically 
shift to the “Real-time Parameter” interface from 
the main interface, and enter into monitoring state. 
In real-time parameter interface, you can find 
such parameters as traveling speed, engine speed, 
working hours, spraying mode, and engine status. 
As the TD400 Text Display Area can only display 
four rows of characters, you can press the key 
or the key to check the previous or next page. 
Real-time parameter interface 1 is shown in the 
right figure. 
Precautions: the max. speed of CUMMINS engine 
is 1800~2350rpm. Press the key once, the value 
will increase or reduce by 50rpm. 
Real-time parameter interface 2 is shown in the 
right figure. 
 
 
 
 
(4) EN and CHS Shift Interface 
In the main interface, you can press F2 to shift 
between English and Chinese versions. The 
interface is shown in the right figure. 
 
 
 
 
 
 
 
 
 
 
 
(5) Function Setting Interface 
In the main interface, you can press F3 to 
enter the Function Setting Interface. Function 
setting interface 1 is shown in the right figure. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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In the function setting interface, you can set 
the engine speed, max. spraying flow and the 
braking time. Before setting, you need to input the 
first class password. 
 
 
Note: 
The hour meter can be only modified when the 
indication is 0. It can be modified only by SANY 
Heavy Industry Co., Ltd. 
Function setting interface 2 is as shown in the 
right figure. 
 
In function setting interface 2, you can press 
F9 to set the engine state as “Manual” or ”Auto”. 
The system default setting is Manual mode. 
When the engine is under “AUTO” mode, you 
can control the engine speed by the “speed control 
switch” on the instrument panel. 
Turn the switch to “rated speed” position, and 
then the engine will work at the set max. speed. 
Turn the switch to “idle speed” position, and 
then the throttle will return to idle speed. 
Turn the switch to “Auto” position, once the 
traveling handle is off the neutral position, the 
engine speed will increase immediately; in 10s 
after the traveling handle returns to the neutral 
position, the engine speed will automatically fall 
down to idle speed. 
When engine is under “Manual” mode, you 
can press F13 to increase engine speed and press 
F14 to reduce engine speed. 
Press F11 to set the spraying control mode as 
“continuous” or “intermittent”. The system default 
setting is “continuous” mode. 
The engine speed depends on the traveling 
speed, gear and the vibration switch position. 
When the vibration switch is not at “stop” 
position, the engine speed is set as the max. 
speed. 
When the vibration switch is at “stop” position, 
if the gear switch is at traveling or working gear and 
the traveling speed exceed 85m/min, then the 
engine speed equals to the set max. speed minus 
100rpm; if the gear is working gear and the 
traveling speed is less than 85m/min, then the 
engine speed equals to the set. max. speed minus 
200rpm. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 CHAPTER 2 OPERATION AND MAINTENANCE 
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(6) System Setting Interface 
In the main system interface, you can press F4 
to enter system setting interface. The interface is 
shown in the right figure. 
 
 
 
 
 
 
 
 
 
 
Input the password, and then edit interface 1 
appears. 
 
 
 
 
 
 
 
 
 
 
 
Edit interface 2 is shown in the right figure. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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(7) Alarm Information Interface (The alarm 
information will always be shown on the display 
when the alarm signal is not cleared.) 
 
 High air filter pressure 
 Low engine oil pressure 
 Low braking pressure 
 High water content in diesel 
 Low water level in water box 
 
This interface shows alarm information in 2 
pages. It shows the above five pieces of alarm 
information and one piece of maintenance 
information. When the alarm information is not so 
much, the interface will display information 
according to the sequence above. 
When alarm signal appears, such as blocked 
air filter, high coolant temperature, low engine oil 
pressure and water shortage in water box, the text 
display will switch from the current interface to the 
alarm information interface immediately. Meanwhile, 
the relevant symbols and indicator lamps will be on. 
 
(8) Maintenance Information Interface 
(Press F4 to clear alarm information up.) 
 
Carry out running-in maintenance. 
Carry out first class maintenance. 
Carry out second class maintenance. 
Carry out thirdclass maintenance. 
 
The maintenance information and alarm 
information are shown in the same interface. The 
former follows the latter. This interface shows 
information in at most 2 pages. 
 
Precautions: 
 All elements on instrument panel ① are 
precise elements. Do not beat or tap them with 
hard object. Keep them clean. 
 Keep all ② sensor adaptors clean and dry. 
Besides, check and make sure the contact points 
are tight, so as to ensure correct and stable 
instrument indication. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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2.4 Cleaning the Equipment 
 Remove the mud and sands on the roller’s 
surface. 
 Remove the dusts and oil stain on the surface of 
engine, hydraulic elements and other parts. 
 Remove the mud and sands on the surface of 
drum or between the drum and mud scraper. 
 Remove the dusts and mud at the air inlet and 
the accumulated dust in the air filter. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2.5 Maintenance Interval 
Illustration: 
 The technical maintenance of the roller is 
subdivided into three kinds, namely, routine 
maintenance, periodic maintenance and one-off 
maintenance (troubleshooting). 
 The periodic maintenance intervals are the 
same as those specified in the engine user’s 
guide. 
 The engine shall be maintained in accordance 
with the engine user’s guide. 
 The periodic maintenance is scheduled from the 
first engine operation. 
 Once the maintenance after 1000h’s operation 
is done, another new periodic maintenance 
begins. 
 
2.5.1 Routine Maintenance 
(1) Cleaning the roller: remove the mud and 
sands on the roller’s surface, as well as the 
dusts and oil stain on the surface of engine, 
hydraulic elements and other parts. No dirt 
may enter the oil inlet and air filter. 
(2) Clean the dust nozzle to remove the dust in 
the air filter. Check the air filter daily. When the 
dust indicator lamp is on, you must clean the 
air filter. 
(3) Check the connection and fastening of spare 
parts. Tighten or replace the loose or broken 
ones. Check whether the cushion block is 
under normal compression state. Check the 
connecting bolts between bearing seat and 
vibratory drum, as well as the connecting bolt 
of driving wheel rim for looseness or damage. 
If any, fasten or replace them. 
(4) Check and rectify the oil leakage at all parts. 
Avoid environmental pollution by oil and other 
harmful materials. 
(5) Check engine oil level in crankcase, fuel level 
in fuel tank and hydraulic oil in hydraulic oil 
tank. Fill qualified new oil to the specified level. 
(6) Check the nozzle, adaptor and filter of 
spraying system. Keep the filter grill clean. Do 
not remove the grill when filling water. After 
operation each day, drain off the pipes. Clean 
the water filter element daily. 
(7) Check if there is water in the water pump 
housing. The eroded working parts may lead 
to damage of motor. 
 
2.5.2 Periodic Maintenance 
In addition to the above periodic maintenance, 
you must carry out an overhaul to the machine and 
change the lubricating oil in reducer every winter. 
 Never wash the roller when the engine is 
running. 
 Do not use gasoline and other flammable 
fluid as cleaning agent. 
 Keep the exhaust tube, oil fillers and air filter 
free of dirt and water. 
 Before washing the roller with high-pressure 
water, you must cover the oil filler and vent 
device on the fuel tank and hydraulic oil tank. 
Do not directly spray water to the oil tank 
cover. 
 Keep all electrical parts and control penal 
free of water. Do not directly spray water to 
the electrical parts and control panel. 
 Cover the alternator and water pump with a 
piece of waterproof film. 
Caution 
CHAPTER 2 OPERATION AND MAINTENANCE 
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 49
 
 
 
 
 
 
 
 
 
Operation Time Action 
After 50h’s operation 
Before operating the machine, you must carry out a 50h’s running-in as per the 
relevant specification in the engine user’s guide. After that, carry out technical 
maintenance according to the following specifications: 
(1) Carry out all work in routine maintenance. 
(2) Change engine oil and replace oil filter. Drain the old oil when the machine is 
warmed up and then fill new oil. Check if the engine oil level is as per 
requirements after short-time operation. 
(3) Change the lubricating oil of vibratory drum. Drain the old oil when the 
machine is warmed up and then fill new oil. 
(4) Change the lubricating oil of reducer. Drain the old oil when the machine is 
warmed up and then fill new oil. 
(5) Clean the diesel pre-filter element. 
(6) Check the hydraulic oil level, and fill hydraulic oil to specified level. 
(7) Check the coolant level in the engine, and fill coolant to specified level. 
(8) Check the cushion block for crack. Replace it if the crack length exceeds 
15mm. 
(9) Check the reducer, spraying system and hydraulic system for leakage, and 
rectify it if any. 
(10) Clean the air filter every 50h’s operation of the engine. 
After 100h’s operation
(1) Carry out all work in routine maintenance. 
(2) Carry out maintenance to the engine as per the Maintenance after 100h’s 
Operation in the engine user’s guide. 
After 250h’s operation
(1) Carry out all work in maintenance after 100h’s operation. 
(2) Carry out maintenance to the engine as per the Maintenance after 250h’s 
Operation in the engine user’s guide. 
(3) Check the oil level in each part of front & rear drums, and fill oil. 
After 500h’s operation
(1) Carry out all work in maintenance after 250h’s operation. 
(2) Carry out maintenance to the diesel engine as per the Maintenance after 
500h’s Operation in the engine user’s guide. 
(3) Check the flexibility of cushion block. Replace the heavily distorted or 
damaged ones. 
(4) Check such key parts as frame and vibratory drums for crack at the welded 
part. Check the driving parts for distortion. If any, rectify it. 
(5) Check the circuit of vibratory switch and control & monitoring device. Repair 
the damaged part should you find any damage. 
After 1000h’s 
operation 
(1) Carry out all work in maintenance after 500h’s operation. 
(2) Carry out maintenance to the engine as per the Maintenance after 500h’s 
Operation in the engine user’s guide. 
(3) Replace the hydraulic oil filter element. 
(4) Check the vibration frequency, and adjust it if necessary. 
(5) Check the technical state of reducer, and maintain it in accordance with the 
relevant requirements. 
 CHAPTER 2 OPERATION AND MAINTENANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 50 
2.5.3 Maintenance for Long-term Parking 
If the roller is to be parked for more than 3 
months, you must carry out the following work: 
(1) Carry out maintenance for long-term parking 
according to the engine user’s guide, and 
conduct anti-rust treatment. 
(2) Clean the inner and outer surfaces of the roller, 
and park it in a garage if possible. When you 
park the machine outdoors, you must park it at 
a ventilated place and cover it with canvas. 
(3) Pad up the front and rear frames to the same 
level, and adjust the thickness of timber block 
till the cushion block is not subject to shearing 
or tensile distortion. 
(4) Fix the front and rear frames together with the 
fixing device of central articulation frame. 
(5) Lubricate or grease all lubricating points. 
(6) Clean the surface of vibratory drum. Wipe off 
the water with a piece of rag. Apply anti-rust 
paint on the surface of vibratory drum. Apply 
anti-rust oil on the exposed processed face of 
assembly parts on vibratory drums. 
(7) Remove the storage battery from the roller. 
Clean its surface. Check the electrolyte level. 
Charge the storage battery monthly. 
(8) Bindup the air filter, dust outlets and air outlets 
with a plastic or paper tape, so as to keep the 
engine free of damp air. 
(9) Drain off the spraying system, including the 
water box, water pump, filter and all pipes. 
(10) Fill up the fuel tank to avoid condensation and 
dust. 
(11) Fill oil into the hydraulic oil tank to the highest 
level. 
 
2.5.4 Maintenance of Electrical System 
1. Storage Battery 
(a) The storage battery used for the machine is 
maintenance free. The battery must be firmly 
secured on the machine. You must regularly 
check it for looseness. 
(b) If the roller is parked for a long term, you must 
check the electricity of storage battery from 
the window of densitometer at the upper part 
of battery. The light green means the battery is 
fully charged; the dark black means there is 
electricity shortage and you must charge the 
battery; and the bright color means you must 
replace the battery. 
(c) When installing the battery, connect the 
positive terminal (+) first and then the negative 
one (-). Apply some Vaseline on the terminals. 
(d) To remove the storage battery, you must cut 
off the negative terminal (-) first and then the 
positive one (+). 
2. Check the lighting and horn systems. Check 
the tightness of each connector and nuts. 
3. Check the tightness of sensor connectors. 
4. Check the electric control cabinet for dust, and 
clean it up if any. Check the tightness of 
electrical parts. 
5. After starting engine, make sure the working/ 
braking pressure indicator lamp is off. Check 
the braking and steering functions. 
6. Check the power relay for accumulated water. 
If any, disassemble it to wipe off the water. 
7. Regularly check the harness connectors for 
accumulated water and oil stain. Keep the 
connectors clean. 
8. Check the connector and nuts on lamps, 
sensors, horn and braking pressure switch for 
looseness. 
9. Check the harness for short circuit, breakage 
or damage, and keep it in a good state. 
10. Check the wiring in electric control cabinet for 
looseness. Keep the wiring secured. 
 
 
 
After operation, you must cut off the general 
power supply, so as to avoid continuous 
electric discharge. 
 
2.5.5 Maintenance of Air Conditioning System 
1. Normal Use 
In order to ensure a favorable technical state 
and working reliability, maximize the working 
efficiency and prolong the service life, you 
must pay attention to the following items when 
using the air conditioner: 
a. Maintain it in strict accordance with 
manufacturer’s instruction. 
b. Start the engine before using air conditioner. 
After the engine has run stably for several 
minutes, you can turn on the air conditioner, 
and choose the proper air volume and 
Caution 
CHAPTER 2 OPERATION AND MAINTENANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 51
refrigeration degree. (When you set the 
refrigeration degree at the maximum, you 
must also set the air volume at the maximum 
to prevent the evaporator from undercooling 
and icing up.) 
c. Close the vents, windows and doors when 
using the air conditioner, so as to achieve the 
desired refrigeration or heating effect as soon 
as possible and to save energy. 
d. When you only wish ventilation effect, you can 
turn on the heating switch but not the hot 
water switch. By doing so, you can have 
ventilation without starting the compressor or 
hot water supply. 
e. During refrigeration, close the hot water valve 
to avoid heating, as otherwise, the 
refrigeration effect may be affected. 
f. Do not use the air conditioning system for a 
long time when the engine is not working. 
Otherwise, the battery electricity may be used 
up and difficult engine startup may be caused, 
g. In the season when you will not use the air 
conditioner or you will park the machine for a 
long time, you must start the engine every half 
a month, and start the air conditioning system 
for refrigeration for 5min~10min. 
 
2. Routine Maintenance 
(a) Keep the condenser clean. Its cleanliness is 
closely related to the heat exchange effect. 
Thus, you must regularly check the condenser 
for oil stain and mud, and the cooling fin for 
bend or blockage. If you find the surface of 
condenser is dirty, use compressed air or 
clean water to clean it up in time. By doing so, 
you can keep the condenser in a sound 
radiation condition and avoid excessive 
condenser pressure and temperature and 
deteriorated refrigeration efficiency due to 
poor radiation performance. When cleaning 
the condenser, do not touch the cooling fin or 
even damage the refrigeration pipes. 
(b) Keep the air filter in air duct clean. As the air 
entering the cab will be filtered by the air filter, 
you must regularly check the air filter for 
blockage by dust or foreign materials, and 
clean it if necessary. By doing so, you can 
ensure a sufficient air volume. In order to 
prevent the air duct of evaporator element 
from blockage which may affect the air volume, 
you must check and clean up the inside and 
outside air filters weekly. 
(c) Check periodically the condition and tightness 
of compressor belt. Tension the belt in time if it 
is loose. Replace it with the special belt for 
vehicle air conditioner if it is cracked or 
damaged. The new belt will stretch after being 
used for 36h~48h, so you must tension it 
again with a tensioning torque of 160N~200N. 
(d) Regularly check the joints, connections, bolts 
and screws of refrigeration system for 
looseness. Check if the pipes collide with the 
surrounding machine parts. Check the hose 
for aging traces. Check if the shock isolation 
rubber pad at the access hole of fender falls 
off or is damaged. 
(e) In such seasons as spring, autumn or winter 
when you will not use air conditioner, you must 
start the compressor of air conditioner for 5 
min~10min every half a month. In this way, the 
refrigerant, during circulation, can bring the 
refrigerator oil to each part in the system, so 
as to prevent the seal rings, compressor shaft 
seals and other parts in system’s pipelines 
from poor sealing and refrigerant leaks due to 
lack of oil. Besides, it may keep the 
compressor, expansion valve and other 
moving parts in the system free of binding, 
sticking or rusting. However, you must carry 
out the maintenance at an ambient 
temperature over 4℃. Otherwise, the oil will 
not be sent to the required parts as soon as 
the compressor is started as a result of 
viscous refrigerator oil with poor fluidity, and 
consequently, the compressor will be heavily 
worn or even damaged. 
3. Regular Maintenance 
In addition to the foresaid routine maintenance 
and inspection conducted by the driver, the air 
conditioning system, as an important system, must 
be subject to some necessary regular maintenance 
and inspection by professional maintenance 
personnel. Only by doing so, can the service life 
and working reliability of air conditioner be 
guaranteed. 
The regular maintenance mainly comprises the 
 CHAPTER 2 OPERATION AND MAINTENANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 52 
following items: 
(a) Compressor 
 Generally check and maintain the compressor 
every three years: check if the air intake and 
exhaust pressures conform to the 
requirements; check the fastenings for 
looseness; and check the compressor for air 
leaks. 
 Disassemble the compressor to check the air 
intake valve and exhaust valve for damage 
and distortion. If any, repair or replace the 
intake and exhaust valve assembly. 
 Once you have disassembled the compressor, 
you must replace the seal rings and shaft 
seals. Otherwise, leaks will occur at the 
sealing parts of compressor. 
(b) Condenser and Cooling Fan 
 Generally check and maintain the condenser 
and cooling fan annually: remove the foreign 
materials and dust on the surface of 
condenser; rectify and repair the coolingfin of 
condenser by a pair of flat nose pliers; 
carefully check the surface of condenser for 
abnormality; and check for refrigerant leaks by 
a leak detector. 
 Recoat the anti-rust painting if it peels off, so 
as to prevent leakage due to rusting and 
perforation. 
 Check whether the cooling fan of condenser 
can normally run. Check the brush of fan motor 
for heavy wear. 
(c) Evaporator 
 Generally, use a leak detector to check the 
evaporator for leakage annually. 
 Undo the evaporator cover every 2~3 years to 
clean the inside and remove the foreign 
materials in the air delivery duct. 
(d) Electromagnetic Clutch 
 Carry out overhaul to the electromagnetic 
clutch every 1~2 years: check whether it 
moves normally; check it for sliding; check the 
joint surface for wear; and check the clutch 
bearing for heavy wear. 
 Use a feeler gauge to check if the clearance of 
electromagnetic clutch conforms to the 
requirement. 
 
(e) Receiver Drier 
 Under normal conditions, replace the receiver 
drier every 3 years. However, if there is water 
entering the receiver drier as a result of 
mis-operation, you must replace it in time. 
 You must also replace the receiver drier if the 
pipeline is opened and ventilated for over 30 
minutes. 
 
(f) Expansion Valve 
 Generally, maintain the expansion valve every 
1~2 years. 
 Check whether it moves normally; check if the 
openness is proper; and check the filter grill 
for blockage. Replace or adjust it if you find 
any abnormality. 
(g) Refrigeration System 
 Fittings: Check the fittings annually. Check its 
sealing condition by a leak detector. 
 Piping: Check whether it collides with other 
parts; check if the hose is aged and cracked; 
and replace the hose every 3~5 years. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4. Others 
(a) Tighten such fastenings as bolts and nuts every 
three months. 
(b) Check the shockproof and insulation rubber pad 
for aging and distortion. If any, replace it. 
(c) Check the heat insulating material of pipeline for 
aging and failure annually. 
(d) Check the refrigeration condition every two 
years. The temperature difference between air inlet 
and outlet must be 7 ~℃ 10 .℃ 
 
Notice 
The foresaid periodic inspection and 
maintenance intervals should be fulfilled 
according to the specific working conditions 
of air conditioner. In southern area where the 
air conditioner is used frequently, you can 
shorten the intervals, while in northern area, 
you can extend the intervals. 
CHAPTER 2 OPERATION AND MAINTENANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 53
 
5. Maintenance Interval 
 
 
Table 2-1 Maintenance Interval 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Assembly Action Interval 
Fittings 
Make sure the locking nut at each fitting is secured; make sure the hoses 
and fittings are free of refrigerant leaks; make sure the hoses and pipes are 
free of crack, aging, embitterment, crushing, and flattening. 
Monthly 
Rectify the distorted condenser fin; clean up the element blocked by foreign 
materials. 
Monthly 
Condenser 
Make sure condensation blower is free of damage in fan and runs normally. Monthly 
Evaporator 
Remove foreign materials in air-in and air-out ducts of evaporator element; 
check the condensate water drain tube at the bottom for blockage, and clean 
it up if any. 
Annually 
Check whether the connectors of pressure switch are secured. Every 3 months Liquid 
reservoir Replace the liquid reservoir after using the air conditioner for some time Every 1000h 
Refrigerant 
Make sure only a little or no air bubble can be found from the check window 
when the air conditioner is under operation. Or else, fill some refrigerant. 
Monthly 
Make sure the fastening bolts are secured. 
Make sure the mounting surface of compressor and the rotary shaft seal of 
main axle are free of refrigerant leaks. 
Monthly 
Check the compressor belt for heavy wear, and replace it if any. Monthly 
Check the tightness of belt, and tension it if it gets loose. Monthly 
Compressor 
Run the air conditioner for a few minutes in the season when you will not use 
it. 
Monthly 
 CHAPTER 2 OPERATION AND MAINTENANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 54 
2.6 Checking the Bolts 
Check the tightness of the following bolts before 
nearly working for the initial 50h. After that, check them 
after every 250h’s operation. The tightening torques of 
bolts are shown in Table 5-1 and Table 5-2. 
 
 
 
 
 
 
 
Table 2-1 Tightening Torques of Bolts on Main Parts (N•m) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Tightening Torque Connecting Parts Thread 
Specification 
Qty. 
(N•m) （lbf·ft） 
Left/right fork foot and frame Bolt M20×2×80 10.9 2×16 578 426 
Right fork foot & reducer Screw M20×55 16 578 426 
Reducer & travel end plum blossom plate Bolt M16×55 16 300 221 
Travel end plum blossom plate & cushion 
block 
Nut M12×1.75 24 120 
89 
Cushion block & contact roller Bolt M12×40 10.9 24 120 89 
Supporting seat & left bearing seat Bolt M16×1.5×55 
10.9 
8 300 
221 
End cover & supporting plate for shock 
absorber 
Bolt M16×1.5×45 
10.9 
12 300 
221 
Pressure cover & supporting seat Bolt M10×30 12.9 12 50 37 
Vibratory end plum blossom plate & 
supporting plate for reducer 
Bolt M16×40 10.9 12 300 
221 
Vibratory end plum blossom plate & 
cushion block 
Nut 12×1.75 48 120 
89 
Vibratory end plum blossom plate & 
connection sleeve 
Screw M16×40 10.9 12 300 
221 
Left fork foot & connection sleeve Screw M16×40 10.9 12 300 221 
Vibratory motor Bolt M14×1.5×35 
10.9 
2 196 
145 
Left/right bearing seat and drum Bolt M20×2×70 10.9 2×8 578 426 
CHAPTER 2 OPERATION AND MAINTENANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 55
 
Table 2-2 Tightening Torques of Other Bolts (N•m) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Tightening Torque Tightening Torque 
Dimension 
(N·m) (lbf·ft) 
Dimension 
(N·m) (lbf·ft) 
M6 10~12 7~9 M16 214~256 158~189 
M8 25~30 18~22 M18 294~353 217~260 
M10 49~59 36~44 M20 417~500 308~369 
M12 86~103 63~76 M22 568~680 419~502 
M14 137~164 101~121 M24 722~864 533~637 
Notice 
 Use a torque spanner to tighten the loose bolts or nuts to the torque specified in the above tables. 
Replace the damaged bolts or nuts with new ones of the same or higher grade. 
 Make sure the threads in bolts and nuts are clean before the installation. 
 Before fitting the bolts and nuts, lubricate them to ensure the friction coefficient. 
 In the event of loose mounting bolts for counterweight, tighten it and contact the nearest 
appointed dealer and the engineer of SANY company. 
 The required tightening torque is expressed in N•m: 
 For example: When using a 1m-long spanner to tighten bolts or nuts and turning the end of 
spanner handle with a force of 120N, the torque produced is: 1m • 120N=120N • m. 
 If you want to use a 0.25m-long spanner to produce the same torque as above: 0.25m y=120N • m; 
 The force required must be: y=120N • m/ 0.25m=480N. 
 CHAPTER 2 OPERATION AND MAINTENANCE 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 56 
2.7. Checking the Functional Oil 
2.7.1 Checking for Oil Leaks 
(a) Check the connectors of pump, motor, multi-way 
valve, valve body, hose and flange for leaks. 
(b) Check the engine oil tank, tandem and worm-gear 
box for oil leaks. 
(c) Check the pipeline of the air conditioner for leaks. 
(d) Check the pipelines in engine for oil, air and water 
leaks. 
 
 
 
 
 
2.7.2 Checking the Oil and Water Levels 
(a) Check the lubricating oil, fuel and hydraulic oil levels 
and fill new oil to the specified scales on oil dipstick.(b) Check the water level in the combined radiator and 
fill water as per the requirements. 
 
 
2.7.3 Table of Oils and Auxiliary Materials 
 
 
 
Table 2-3 Oils and Auxiliary Materials 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Volume 
Material 
Recommended 
Brand 
Using Parts 
(L) (GAL) Replace Time 
Premium No.0 
Light diesel 
oil 
Premium No.35 
(winter) 
Fuel oil tank of engine 200 52.8 Depend on season 
and district 
Engine oil 
Shell diesel oil 
CG-415W40 
Crankcase of engine 13 3.4 250h or 2 month 
(50h for the first time)
Running reducer 1.5 0.4 
Replace oil in winter 
and summer (50h for 
the first time) 
Industrial 
lubricating oil 
Shell gear oil 
VG150 
Vibratory drum 8 2.1 500h (50h for the 
first time) 
Running bearing of vibratory 
drum 
Fill 2/3 of capacity 
Fill once when 
operating heavy 
repair 
Lubricant 
Shell lithium-based 
grease NLG12 
Circle bearing As required Fill once/shift 
Deutz engine 110 29.1 
Hydraulic oil 
Shell hydraulic oil 
46 
Hydraulic 
tank 
Cummins 
engine 
80 21.1 
2000h or 
one year 
Non-freezing 
solution 
Shell Freezeguard 
(-45º) 
Water box of engine 12.1 3.2 As required 
CHAPTER 3 TRANSPORTION OF ROLLER 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 57
 
 
 
 
 
 
 
Full Hydraulic Single Drum Roller Operation Manual 
 
Operation & Maintenance 
 
2.1 Starting of Equipment 
2.2 Check before Normal Operation 
2.3 Operation of Working Device 
2.4 Cleaning of Device 
2.5 Maintenance Cycle 
2.6 Check of Bolts 
2.7 Check of Functional Oil 
 
 
 
 
 
 
 
 
P28~45 
 
 
 
 
 
 
 
 
 
Full Hydraulic Double Drum Vibratory Roller Operation Manual 
 
Transportation of Roller 
 
3.1 Transfer Vehicle 
3.2 Self-propelled Ascending Transfer 
Vehicle via Slope 
3.3 Loading and Unloading by Crane 
3.4 Winch Traction 
 
 
 
 
 
 
 
 
P58~59 
 
CHAPTER 3 TRANSPORTION OF ROLLER 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 58 
 Chapter 3 Transportation of Roller
3.1 Transfer Vehicle 
Either transportation on highway or railway, the 
roller should be transported by the vehicles with proper 
capacity and load capacity. The transfer vehicle must 
meet the requirements of this kind of transportation 
facilities such as max. load, engine power, brake 
capacity and other conditions. You’d better transport 
the roller exclusively without loading other machines 
during each transportation. 
(1) During transportation, necessary measures 
should be taken to avoid slipping and rolling of the 
roller. 
(2) Keep a certain space away when passing 
through the buildings, bridges, culverts and electric 
facilities, etc. 
(3) Use transfer vehicle for long-distance 
transportation of roller. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3.2 Self-propelled Ascending Transfer 
Vehicle via Slope 
You must use a slope to load and unload the large 
double drum vibratory roller. Make sure the slope is in 
the optimum condition. You must use metallic slope as 
possible, but not the metamorphic slope which has 
been placed for a long time. Besides, you must ensure 
the slope with a sufficient width and strength to support 
the machine and a gradient less than 15°. 
Make sure the slope is placed between the 
transfer vehicle and ground correctly; the slope is not 
covered by greasy dirt, snow, ice and mud; and the 
transfer vehicle is laid with foundation. 
Start the roller and adjust its location to make its 
front part aligned with the slope. After that, drive the 
roller onto the transfer vehicle at a low speed. You must 
place some timber blocks in advance at the position 
where the roller is to be parked. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Grade spacing Max. gradient: 15° 
Timber block 
CHAPTER 3 TRANSPORTION OF ROLLER 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 59
3.3 Loading and Unloading by Crane 
You must use a crane to load the small double 
drum vibratory roller on the transfer vehicle. All small 
rollers have lifting holes. Before lifting the roller, lock the 
steering mechanism to secure it against rotation. The 
weight of the roller is marked on its rating plate. Check 
the rating plate to confirm the machine weight before 
lifting. Carry out lifting in strict accordance with the 
safety regulations. 
 
 
 
 
 
 
 
3.4 Winch Traction 
Release all brakes of the roller. Fit the chain to the 
roller. Load the winch on the transfer vehicle. You must 
use the chain and cable with proper dimensions but not 
the thick rope. Start the winch and drag the roller onto 
the trailer. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Never lift the machine with the front and rear 
towing hooks. Otherwise, the machine may be 
damaged. 
Caution 
Caution 
Locking the Steering Mechanism 
Lifting Hole 
 Keep in mind that it is dangerous to load/unload
the roller on the transfer vehicle. 
 When loading or unloading the roller on the 
transfer vehicle, do not stay under or near the 
roller. Never move or drag the machine by 
hands as crushing accident may occur when
loading the roller. 
 Make sure each part of the roller is secured. 
 Do not use a crane to load and unload the large 
roller. 
INDEX 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 60 
 
 
 
 
 
 
 
Full Hydraulic Single Drum Roller Operation Manual 
 
Operation & Maintenance 
 
2.1 Starting of Equipment 
2.2 Check before Normal Operation 
2.3 Operation of Working Device 
2.4 Cleaning of Device 
2.5 Maintenance Cycle 
2.6 Check of Bolts 
2.7 Check of Functional Oil 
 
 
 
 
 
 
 
 
P28~45 
 
 
 
 
 
 
 
 
 
Full Hydraulic Single Drum Roller Operation Manual 
 
Transportation of Roller 
 
3.1 Transfer Vehicle 
3.2 Self-propelled Ascending Transfer 
Vehicle via Slope 
3.3 Loading and Unloading by Crane 
3.4 Winch Traction 
 
 
 
 
 
 
 
 
 
P47~48 
 
 
 
 
 
 
 
 
 
Full Hydraulic Double Drum Vibratory Roller Operation Manual 
 
Index 
 
 
 
 
 
 
 
 
 
 
 
 
 
P61 
 
 
INDEX 
YZC12C FULL HYDRAULIC DOUBLE DRUM ROLLER OPERATION MANUAL 
 61
 
Index 
Ａ 
Air Intake System......................................................10 
Ｂ 
Basic Structure of Distribution Control Cabinet .......25 
Brake Hydraulic System ...........................................29 
Braking During Traveling ..........................................37 
Ｃ 
Cab and Control System ............................................8 
Central Articulation Frame ..........................................5 
Check before Starting ...............................................31 
Check After Starting with the Roller Running in place37 
Check Before Operation...........................................37 
Cleaning the Equipment ...........................................48 
Checking the Bolts ....................................................54 
Checking the Functional Oil......................................56 
Ｅ 
Electrical Control Devices.........................................12 
Engine..........................................................................9 
Exhaust System........................................................11 
Engine Electrical System..........................................15 
Engine Speed Control...............................................37 
Ｆ 
Frame Assembly .........................................................4 
Function Description ...................................................4 
Fuel System...............................................................12 
Ｇ 
General ......................................................................12Ｈ 
Hydraulic Control Devices ........................................26 
Ｌ 
Loading and Unloading by Crane ............................59 
Ｍ 
Main Technical Characteristics...................................2 
Monitoring Electrical System....................................17 
Maintenance Interval ................................................ 48 
Maintenance for Long-term Parking........................ 50 
Maintenance of Electrical System ........................... 50 
Maintenance of Air Conditioning System ................ 50 
Ｏ 
Operating the Working Device................................. 37 
Overall Structure ......................................................... 1 
Ｐ 
Parking ...................................................................... 42 
Periodic Maintenance............................................... 48 
Ｒ 
Routine Maintenance ............................................... 48 
Ｓ 
Safety Protection Device............................................ 8 
Spraying System......................................................... 7 
Spraying Control System.......................................... 23 
Steering Hydraulic System....................................... 28 
Starting the Equipment............................................. 31 
Starting ...................................................................... 35 
Self-propelled Ascending Transfer Vehicle via Slope58 
Spraying \y.............................................................. 40 
Ｔ 
Text Display............................................................... 42 
Technical Parameters................................................. 3 
Traveling and Brake Control System....................... 21 
Traveling Hydraulic System ..................................... 26 
Traveling.................................................................... 37 
Transfer Vehicle ........................................................ 58 
Ｖ 
Vibratory Compaction............................................... 38 
Vibratory Drum Assembly........................................... 6 
Ｗ 
Winch Traction .......................................................... 59 
 
 
 
 
APPENDIX 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 62 
 
 
 
 
 
 
 
Full Hydraulic Double Drum Vibratory Roller Operation Manual 
 
Appendix 
 
Overall Structure 
Hydraulic basic diagram 
Electrical Schematic Diagram 
 
 
 
 
 
 
 
 
 
 
P63~65 
 
APPENDIX 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 63 
Appendix 
Overall Structure 
1-Spraying system (two sets) 
2-Rear frame assembly 
3-Central articulation frame 
4-Hydraulic system 
5-Front frame assembly 
6-Vibratory drum assembly 
7-Power system assembly 
8-Console assembly 
9-Air conditioner 
10-Cab 
11-Electrical system 
12-Covering parts assembly 
APPENDIX 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 64 
Hydraulic Basic Diagram 
 
APPENDIX 
YZC12C FULL HYDRAULIC DOUBLE DRUM VIBRATORY ROLLER OPERATION MANUAL 
 65 
Electrical Schematic Diagram 
 
CHAPTER 3 TRANSPORTION OF ROLLER 
YZC12C FULL HYDRAULIC DOUBLE DRUM ROLLER OPERATION MANUAL 
 66 
3.3 Loading and Unloading by Crane 
Small double drum vibratory roller can be loaded 
on the transfer vehicle with crane. All small rollers have 
hoisting hole. Before hoisting the roller, its rotation 
should be prevented which will lock the steering 
mechanism. The weight of the roller is marked on its 
name plate. Check and verify the machine weight on 
the name plate when hoisting and operate according to 
the safety regulations of the crane. 
 
 
 
 
 
 
3.4 Winch Traction 
Release all brakes of the single drum vibratory 
roller, connect the chain to the roller and load the winch 
on the transfer vehicle. Use chain and wire rope with 
proper dimensions but not coarse rope. Start the winch 
and drag the roller onto the trailer. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Caution 
Caution 
Locking Steering mechanism 
Lifting hole 
Hoisting on the positions of the front and rear 
drawbar hooks are forbidden to avoid any 
damages to the machine 
 Keep in mind that it is dangerous to load the
single drum vibratory roller on the transport
vehicle. 
 When loading the single drum vibratory roller on
the transport vehicle, do not stay at the area
below or adjacent to the single drum vibratory
roller. Don’t attempt to move or drag the
machine by hands. Please be aware that
loading of the double drum vibratory roller will
cause the compression damages. 
 Make sure each part of the single drum vibratory
roller is not loose. 
 Loading and unloading by crane is forbidden for
large roller. 
INDEX 
YZC12C FULL HYDRAULIC DOUBLE DRUM ROLLER OPERATION MANUAL 
 67
 
 
 
 
 
 
 
Full Hydraulic Single Drum Roller Operation Manual 
 
Operation & Maintenance 
 
2.1 Starting of Equipment 
2.2 Check before Normal Operation 
2.3 Operation of Working Device 
2.4 Cleaning of Device 
2.5 Maintenance Cycle 
2.6 Check of Bolts 
2.7 Check of Functional Oil 
 
 
 
 
 
 
 
 
P28~45 
 
 
 
 
 
 
 
 
 
Full Hydraulic Single Drum Roller Operation Manual 
 
Transportation of Roller 
 
3.1 Transfer Vehicle 
3.2 Self-propelled Ascending Transfer 
Vehicle via Slope 
3.3 Loading and Unloading by Crane 
3.4 Winch Traction 
 
 
 
 
 
 
 
 
 
P47~48 
 
 
 
 
 
 
 
 
 
Full Hydraulic Double Drum Roller Operation Manual 
 
Index 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
P68 
 
 
INDEX 
YZC12C FULL HYDRAULIC DOUBLE DRUM ROLLER OPERATION MANUAL 
 68 
 
Index 
Ａ 
Air Intake System.............................................................12 
Ｂ 
Basic Structure of Distribution Control Cabinet.........27 
Brake Hydraulic System.................................................33 
Brake During Traveling ...................................................42 
Ｃ 
Cab and Control System..................................................9 
Center Articulation Frame ................................................5 
Check to be conducted for the roller running in place 
after startup of the engine..........................................41 
Check Before Normal Operation.......................................41 
Control of Spraying System...........................................45 
Control of Text Display....................................................48 
Cleaning of Device .............................................................54 
Check of Bolts.....................................................................61 
Check of Functional Oil .....................................................63 
Ｅ 
Electrical Control Devices..................................................14 
Engine..................................................................................10 
Exhaust System ...............................................................13 
Electrical System of the Engine....................................18 
Ｆ 
Frame Assembly ................................................................4 
Function Description ............................................................4 
Fuel System ......................................................................14 
Ｇ 
General...............................................................................14 
Ｈ 
Hydraulic Control Devices.................................................29 
Ｌ 
Loading and Unloadingby Crane......................................66 
Ｍ 
Main Technical Characteristics .......................................1 
Monitoring Operation of Electrical System ................ 20 
Maintenance Cycle ............................................................ 54 
Maintenance of Electrical System ............................... 56 
Maintenance of Air Conditioning System................... 57 
Ｏ 
Operation of Rotary Speed of the Engine.................. 42 
Operation of Working Device ........................................... 42 
verall Structure ................................................................... 1 
Ｐ 
Parking............................................................................... 47 
Please carry out the following checks prior to starting35 
Periodic Technical Maintenance .................................. 55 
Ｒ 
Routine Maintenance ..................................................... 54 
Ｓ 
Safety Protection Device ................................................. 9 
Spraying System ............................................................... 7 
Sprinkling Control System............................................. 26 
Steering Hydraulic System............................................ 32 
Starting of Equipment........................................................ 35 
Starting............................................................................... 39 
Self-propelled Ascending Transfer Vehicle via Slope...... 65 
Ｔ 
Technical Maintenance for Long-term Parking......... 56 
Technical Parameters ........................................................... 2 
Traveling and Brake Control System.......................... 24 
Traveling Hydraulic System .......................................... 29 
Travel Operation.............................................................. 42 
Transfer Vehicle.................................................................. 65 
Ｖ 
Vibratory Compaction Control ...................................... 43 
Vibratory Drum Assembly................................................ 6 
Ｗ 
Winch Traction................................................................... 66 
 
 
 
 
APPENDIX 
YZC12C FULL HYDRAULIC DOUBLE DRUM ROLLER OPERATION MANUAL 
 69
 
 
 
 
 
 
 
Full Hydraulic Double Drum Roller Operation Manual 
 
Appendix 
 
Overall Structure 
Hydraulic basic diagram 
Electrical Schematic Diagram 
 
 
 
 
 
 
 
 
 
 
 
P70~72 
 
 
APPENDIX 
YZC12C FULL HYDRAULIC DOUBLE DRUM ROLLER OPERATION MANUAL 
 70 
Appendix 
Overall Structure 
1-Spraying system (two sets) 
2-Rear frame assembly 
3-Center articulation frame 
4.-Hydraulic system 
5-Front frame assembly 
6-Vibratory drum assembly 
7-Power system assembly 
8-Console assembly 
9-Air conditioner 
10- Cab 
11-Electrical system 
12-Covering parts assembly 
APPENDIX 
YZC12C FULL HYDRAULIC DOUBLE DRUM ROLLER OPERATION MANUAL 
 71 
Hydraulic basic diagram 
 
APPENDIX 
YZC12C FULL HYDRAULIC DOUBLE DRUM ROLLER OPERATION MANUAL 
 72 
Electrical Schematic Diagram 
 
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