Sinotruk is now leader truck brand in China and popular in more than 80 countries. But many drivers still feel confused that how to drive a Sinotruk or Howo truck?
This Driver’s Manual introduces the operating method, daily maintenance and vehicle maintenance of New HOWO series vehicles, and
relevant safety regulations to be observed during vehicle use. For details on assemblies, modifications or attachments not manufactured by
SINOTRUK, please refer to the documents provided by their manufacturers.
Please read this Manual carefully before driving the vehicle for the first time.
Due to the large number of models, the pictures in this manual may not exactly match the model you purchase; the illustrations are merely
representative examples. SINOTRUK reserves the right to modify the shape, configuration and technical performance of the vehicle at any
time. Therefore, we will not accept any claims that may have been made against the data, illustrations or text descriptions in this manual.
The vehicle configuration is subject to the order, and the driver’s manual will be updated from time to time.
The Driver’s Manual is a part of vehicle, please keep them in your vehicle and available for use.
Warning symbols used in this manual are as follows:
CAUTION: These safety instructions warn against possible injury (risk of serious or fatal injury).
WARNING: These safety anstructions warn against possible damage to property.
NOTE: These notes provide additional information which may prove invaluable.
Wish you would have a safe and enjoyable drive!
China National Heavy Duty Truck Group Co., Ltd. (SINOTRUK)
2019.11
This Manual shall not be reproduced, copied, translated or extracted without written permission of SINOTRUK. This Manual is copyrighted, all
copyrights belong to SINOTRUK.
III
Warning
WARNING
– Engine must use special oil for SINOTRUK engines, engine oil filter element and fuel filter element; otherwise, it may cause
premature wear of engine, and SINOTRUK will only provide paid service!
– Transmission must use special transmission gear oil of SINOTRUK; otherwise, it may cause transmission damage, and
SINOTRUK will only provide paid service!
– Drive axle must use special drive axle gear oil of SINOTRUK; otherwise, it may cause drive axle damage, and SINOTRUK
will only provide paid service!
– When replacing air filters, only use SINOTRUK original parts, otherwise dust may enter engine inlet. SINOTRUK only
provides paid service.
– Please use special coolant for SINOTRUK; otherwise it may cause engine damage, and SINOTRUK will only provide paid
service!
– Please go to the Sinotruk-appointed service station for the replacement of fuel and oil filter elements, and first or regular
maintenance.
The vehicle nameplate is located inside the co- driver’s side door (visible after the door is opened). Vehicle model, main quality parameters
and engine model are indicated on nameplate.
VIN is printed on outside of frame right girder web at front axle center line and vehicle nameplate. Please verify whether VIN is consistent with
certificate of conformity.
Engine nameplate is mounted on the cooler’s cap. Engine nameplate information includes engine model, rated power/speed, etc.
Vehicle nameplate VIN
Engine nameplate -D10 series Engine nameplate -D10 series Engine nameplate – T12 series
Contents
Chapter I Vehicle Operation ……………………………………………………………………………………………………………………………… 1
Door operation ……………………………………………………………………………………………………………………………………………………. 2
Rear-view mirror regulating …………………………………………………………………………………………………………………………………… 5
Heating of front windshield …………………………………………………………………………………………………………………………………… 6
Storage box …………………………………………………………………………………………………………………………………………………………. 7
Tool kit ……………………………………………………………………………………………………………………………………………………………….. 9
Dashboard …………………………………………………………………………………………………………………………………………………………. 10
Sun visor …………………………………………………………………………………………………………………………………………………………… 11
Manual sunroof …………………………………………………………………………………………………………………………………………………. 12
Seat adjustment …………………………………………………………………………………………………………………………………………………. 14
Seat belt ……………………………………………………………………………………………………………………………………………………………. 17
Bunk …………………………………………………………………………………………………………………………………………………………………. 20
Adjustment of steering wheel ………………………………………………………………………………………………………………………………. 21
Cab inside overview ……………………………………………………………………………………………………………………………………………. 22
Instrument panel ……………………………………………………………………………………………………………………………………………….. 23
Rocker switches and bottons ……………………………………………………………………………………………………………………………….. 27
Detction lamps and alarm lamps ………………………………………………………………………………………………………………………….. 30
Driver’s display and detction lamps panel ……………………………………………………………………………………………………………… 34
Display information on driver’s display screen and detction lamps panel ………………………………………………………………….. 46
Left combination switch………………………………………………………………………………………………………………………………………. 55
Right combination switch ……………………………………………………………………………………………………………………………………. 57
Key switch …………………………………………………………………………………………………………………………………………………………. 59
VI
Electric horn/air horn …………………………………………………………………………………………………………………………………………. 61
24V cigar lighter ………………………………………………………………………………………………………………………………………………… 62
Mannual accelerator control˄Euro II standard˅ ………………………………………………………………………………………………….. 63
Lighting …………………………………………………………………………………………………………………………………………………………….. 65
Radio cassette player ………………………………………………………………………………………………………………………………………….. 67
Telematics …………………………………………………………………………………………………………………………………………………………. 68
Brake system……………………………………………………………………………………………………………………………………………………… 69
A/C system ………………………………………………………………………………………………………………………………………………………… 89
Independent heater system ………………………………………………………………………………………………………………………………… 96
Cab tilting mechanism ………………………………………………………………………………………………………………………………………. 100
Cab suspension system ……………………………………………………………………………………………………………………………………… 105
Extinguisher …………………………………………………………………………………………………………………………………………………….. 107
Overvoltage alrm device(special device) ……………………………………………………………………………………………………………… 107
Chapter II Driving Preparation …………………………………………………………………………………………………………………………… 108
Inspection and maintenance overview ……………………………………………………………………………………………………………….. 109
Inspection and maintenance before engine startup ……………………………………………………………………………………………… 111
Inspections after engine startup ………………………………………………………………………………………………………………………… 125
Chapter III Vehicle Driving ………………………………………………………………………………………………………………………….. 129
Driving/running-in ……………………………………………………………………………………………………………………………………………. 130
Use the vehicle economically …………………………………………………………………………………………………………………………….. 131
Tachograph ……………………………………………………………………………………………………………………………………………………… 133
Vehicle load …………………………………………………………………………………………………………………………………………………….. 136
Vehicle use in winter ………………………………………………………………………………………………………………………………………… 138
Start engine …………………………………………………………………………………………………………………………………………………….. 140
VII
Turn off engine …………………………………………………………………………………………………………………………………………………. 145
Start and stop switch under the cab ……………………………………………………………………………………………………………………. 146
HW transmission ………………………………………………………………………………………………………………………………………………. 147
ZF transmission ………………………………………………………………………………………………………………………………………………… 157
Operation of the transfer case (AWD vehicle) ………………………………………………………………………………………………………. 171
Differential lock ………………………………………………………………………………………………………………………………………………… 173
Operation of semitrailer ……………………………………………………………………………………………………………………………………. 177
Fifth wheel ………………………………………………………………………………………………………………………………………………………. 181
Chapter IV Practical Suggestions ……………………………………………………………………………………………………………………….. 183
Replacement of wheels……………………………………………………………………………………………………………………………………… 184
Towing and Towing Start ……………………………………………………………………………………………………………………………………. 189
Jump Start ……………………………………………………………………………………………………………………………………………………….. 193
Energy storage spring brake chamber – emergency release …………………………………………………………………………………… 195
Belt …………………………………………………………………………………………………………………………………………………………………. 198
Fuel system ……………………………………………………………………………………………………………………………………………………… 200
Vehicle LNG supply system ………………………………………………………………………………………………………………………………… 202
Vehicle CNG supply system ………………………………………………………………………………………………………………………………… 207
Air cleaner ……………………………………………………………………………………………………………………………………………………….. 213
Electrical system ………………………………………………………………………………………………………………………………………………. 220
Lighting …………………………………………………………………………………………………………………………………………………………… 222
Vehicle cleaning & maintenance …………………………………………………………………………………………………………………………. 224
Chapter V Vehicle Maintenance ………………………………………………………………………………………………………………………… 228
Steering system ………………………………………………………………………………………………………………………………………………… 229
Natural gas engine ……………………………………………………………………………………………………………………………………………. 245
VIII
Clutch operating system ……………………………………………………………………………………………………………………………………. 257
Transmission ……………………………………………………………………………………………………………………………………………………. 261
ZF transmission ………………………………………………………………………………………………………………………………………………… 265
Front axle ………………………………………………………………………………………………………………………………………………………… 271
Hydraulic lifting axle …………………………………………………………………………………………………………………………………………. 276
Drive axle ………………………………………………………………………………………………………………………………………………………… 282
Suspension ……………………………………………………………………………………………………………………………………………………… 293
Maintenance of complete vehicle ………………………………………………………………………………………………………………………. 295
Chapter VI Safety and Environmental Protection ………………………………………………………………………………………………… 304
Safety instruction …………………………………………………………………………………………………………………………………………….. 305
Environmental Protection …………………………………………………………………………………………………………………………………. 315
Chapter VII Technical Parameters ………………………………………………………………………………………………………………………. 316
Technical Parameters ………………………………………………………………………………………………………………………………………… 317
Door operation (outside vehicle)
Open vehicle door
x If the door is at non-locked state, press the handle and pull outwards, and
the door can be directly opened.
x If the door is at locked state, insert the key into the lockhole, rotate the key
180 degrees anticlockwise.Pull the handle and open the door.
Lock vehicle door
x Close the door, insert the key into lockhole, rotate the key180 degrees
clockwise, remove the key and the door is locked.
Door operation (inside door)
Open the door
Pull handle (rotate it to a certain angle), push the door outwards, and the
door can be opened.
Lock the door
x Close the door with proper force
x Press the lock switch to lock the door.
Manual window regulator
Rotate the handle to regulate the window.
The function and operation of the passenger side window regulator are the
same as those of the driver side window regulator.
Electric window lifting (at driver’s side)
x Window lifting can be controlled by the switch located between trim panel
and door glass.
x Press rocker switch or , glass left (right) begins to fall; Release the
switch or ˈglass left (right) stops falling.
x When you lift switch ˈleft (right) glass window begins to rise˗when you
release switch or left (right) galss window stops rising
x Lifting or pressing switch or for more than 2S, the window will
automatically lift to the top or fall to the bottom.
Electric window lifting (at co-driver’s side)
There is only one button on the window-lifting rocker switch at co-driver’s side
which controls rise and fall of door window glasses at single one side.
WARNING
– Be careful of the risk of injury.
– Make sure that there is no pinch when closing the window.
– To prevent over-heating of door window and door lock
motors due to frequent switching actions, the control
system provides them with overheat protection.
Rear-view mirror regulating
x Blind spot mirror: hold the circumference of blind spot mirror , and apply a
proper force to press the mirror surface to adjuest it to the required angle of
view.
x Downwards-view mirror: hold the view mirror and ramdomly rotate it to
the required angle of view with proper force.
x Main rearview mirror: hold the frame of main rearview mirror , and apply a
proper force to press the mirror surface to adjust it to the required angle of
view.
x Wide angle rearview mirror: hold the frame of main rearview mirror , and
apply a proper force to press the mirror surface to adjust it to the required
angle of view.
For more information, kindly contact us to get complete manual.