SANY SRT95C Off-Highway Truck. Service Manual

Fig.4 Seat Mounting Assembly

1. Mechanic suspension seat

6. Bolt

2. Nut

7. Right connecting board

3.Washer

8. Bolt

4. Washer

9. Bolt

5. Left connecting board

10. Passenger seat

8.1.2 Seat mounting assembly

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Overview

See Fig.4 for the numbers in brackets.
Fix driver’s seat onto the cab’s bottom board
with bolt (8), washer (3

、

4) and nut (2). The

seat assembly is mounted onto the seat
support with a resilient cushion and back
cushion; and the seat frame is mounted onto
the bracket of driver’s seat in an air-borne
manner. One adjustable 2-point type safety

belt is configured and it is fixed onto the seat

assembly.
Caution: This seat can automatically adjust
the rigidity of suspension mechanism in
accordance with the weight of driver through
the sensor on the seat so as to adapt seat to
the weight of driver.
1. The caster angle of seat back is controlled
through the backrest adjusting handle and can
be adjusted at the driver’s will.
2. The seat can be raised by 30mm when you
hear a "click" sound, and another 30mm at
the second "click". Move the backrest to an
optimum position at where operation can be
easily conducted, and release the handle.
3. Pull up the seat can adjust height, there are
three levels(low

、

middle

、

high), when the

seat is on high level, if pull up the seat, it will
return low level.
4. To move the seat forwards and backwards,
pull the front and back adjusting handles
to move seat to the required position. The
driver’s seat is not equipped with a suspension
mechanism, so its height cannot be adjusted.
However, the front and back positions as well
as the angle of backrest can be adjusted in the
same way as driver’s seat.

Removal and disassembly

1. Park the truck in a flat working area, apply

parking brake and shut down the engine.
2. Rotate the steering wheel left and right for
several turns respectively and release the
pressure in the steering system. Chock all
wheels properly.

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3. Use the proper lifting equipment. Properly
tie the seat. Take down the flat washer (1),

spring (2) and bolt (4) fixed on the driver’s cab

bottom board. Move the whole seat assembly
out of the truck.
4. Loosen all bolts and locking gaskets with

fixed safety belts and take off the safety belts.

5. If necessary, remove the rubber cover to
expose the seat suspension frame assembly
and height adjuster.

Inspection

Check all brackets and frame for cracks and/
or damage. Repair or replace as necessary.

Assembly and installation

Note

:Tighten all fasteners without special

torques specified to torques listed in Section
36.2, STANDARD BOLT AND NUT TORQUE
SPECIFICATIONS.
1.  In  case  the  protective  cover  has  been
removed,  first  install  it  onto  the  bottom  of
seat so as to make it cover suspension frame
assembly and height adjuster completely.
2. Connect the driver’s seat, co-driver’s seat
and  seat  bracket  with  bolts  and  gaskets
removed during disassembly.
3. Fasten the safety belt onto the seat with
bolt and locking gasket in the same way as
disassembly.
4. Place the seat on the floor of driver’s cab

with a proper lifting device and fixed it with bolt

and gasket.

Maintenance

Add a bit lubricant onto such moving
components as suspension frame assembly
and height adjuster at regular intervals.
The driver should inspect the safety belt on
schedule. If the mounting parts get worn or
broken, belt get notched or abraded, lock fails,
the connector gets loosened, or the safety belt
gets aged, they should be replaced timely.

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8.1.3 Steering column mounting

assembly

Fig.5 Steering column mounting assembly

1. Steering Gear

B. Steering column body

2. Screw

C. Lower rubber sheath

3. Washer

D. Steering spline shaft assembly

4. Washer

E. Mounting bracket

5. Nut

F. Combination switch

6. Bolt

G. Height adjusting knob of Steering column

A.Steering wheel

H. Tilt angle adjusting knob of Steering column

Cab Accessories

Overview

Numbers in parentheses refer to Fig.5.
The  steering  column  (1)  is  fixed  onto  the
driver’s cab bottom board by using the bolt (6),
washer (3) and lockwasher(4). The steering
column  (1)  consists  of  the  steering  wheel
(A), steering column body (B), lower rubber
sheath (C), steering spline shaft assembly
(D), mounting support (E), combined switch
(F), steering column height adjusting knob(G),
steering column tilt angle adjusting knob (H)
and the connecting pieces.
Caution: The  driver  can  adjust  height  and
tilt angle of the steering column by the two
buttons.
1. The driver can adjust the height of steering
column  by  50mm  via  the  height  adjusting
button of steering column.
2. With the steering column tilt angle adjusting
button, the driver can perform the 14° tilting
adjustment on the steering column.

Removal and disassembly

Numbers in parentheses refer to Fig.5.
1. Park the truck in a proper way.
2. Remove the bolt (6), washer (3) and

lockwasher (4) fixing the steering column base

seat.
3.  Unscrew  all  of  the  bolt  (6),  washer  (3),
spring lockwasher (4) and nut (5) fixing the
base seat.
4. Remove the line plug connectors of steering
column,  and  remove  the  steering  column
assembly from the bottom board of driver’s
cab.
5. Loosen all fastening screws and gaskets of
lower rubber sheath (C) and steering spline
shaft assembly (D). Remove the clamping bolt
inside lower rubber sheath connecting to the
lower universal joint and steering spline shaft
assembly. Take out the lower rubber sheath.
6.  If  necessary,  the  lower  rubber  sheath
(C)  can  also  be  dismantled  to  expose  the

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telescopic link of steering column so as to
facilitate further disassembly.

Inspection

Check whether all connections are reliable
and whether any damage occurs to lines, shell
protective cover and lower rubber sheath.
Repair or replace it timely if any.

Assembly and installation

Numbers in parentheses refer to Fig.5.

Caution

: Tighten all fasteners to reach the

standard torque according to section‘Technical
Conditions for Tightening Torques of Standard
Bolts and Nuts’ in the manual.
1. If the lower rubber sheath (C) has been
removed, then install the lower rubber sheath

onto the steering column body (B) at first.

2. Use the bolt and washer removed during
the dismantling to properly connect the lower
universal joint and the steering spline shaft
assembly (D).
3. Properly connect the upper end of lower
rubber sheath (C) and the steering column
body (B). Then install all screws and washers

for fixing the lower rubber sheath (C) and the

steering spline shaft assembly (D). It is the
same as the removing process.
4. Properly connect the steering spline shaft
assembly and the steering column. Tighten the
bolt (6), washer (2) and lockwasher (3) so that
the steering gear is fixed inside the driver’s
cab.
5. Install and tighten the bolt (6), washer (3),
lockwasher (4) and nut (5).

Maintenance

Add lubricant onto the butter mouth of
universal joint at regular interval.

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8 . 1 . 4 A c c e l e r o g r a p h c o n t r o l l e r

mounting assembly

Overview

The accelerator pedal is secured to the cab

floor with bolts(2), washers(3), lockwashers(4)

and nuts (5). When the operator operates, the
following points should be noticed:
1. Function of accelerograph: Changing both
the rotational speed and the output power and
torque of engine synchronously. Accelerator
pedal is the operating device of the engine
oil supply system. The rotational speed of
the engine may be altered when the pedal is
pressed down and released.
2. The SRT95C mining dump truck adopts
the  electronic  accelerator  control  system
which  mostly  consists  of  the  accelerator
pedal,  pedal  displacement  sensor  (sliding
rheostat), ECM (electronic control module),
data bus, servo motor and air throttle actuator.
The displacement sensor is installed inside
the  accelerator  pedal  and  it  monitors  the
position  of  accelerator  pedal  at  any  time.
When it is monitored that the height position of
accelerator pedal is changed, this information
will be transmitted instantaneously to ECM.
ECM will perform the operation processing
on this information and the data information
transmitted from other systems and work out a
control signal. This signal will be transmitted to
the servo motor relay via the circuit. The servo
motor will drive the air throttle actuator. The
data bus is responsible for the communication
between the system ECM and the other ECU
(electronic control unit).
3. For the fuel addition, if it is felt that the
accelerograph doesn’t make a reaction as fast
as its usual performance or that the engine
lacks the power, check the spark cover, fuel
injection nozzle and air throttle to see whether
it is necessary to replace the spark cover or
clean the air throttle and fuel injection nozzle.
4. In the case that the accelerograph doesn’t

Fig.6 Accelerograph controller assembly

1. Accelerograph controller 4. Lockwasher
2. Bolt

5. Nut

3. Washer

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work when it is pressed down during the
traveling, then it is normal all the time after the
truck is stopped and filled with the fuel, and
the above-mentioned fault occurs again after
the truck runs for a period, the following points
of fault causes may exist: the pressure of fuel
pump is insufficient and the air lock occurs

after the truck warms up, or the filter element
is dirty and it leads to insufficient fuel supply;

or the ignition energy is insufficient after the
coil is heated; the measurement signal of
valve sensor or air intake pressure sensor
is incorrect and it leads to the abnormal fuel
injection pulse; the fuel filter is dirty and it
leads to insufficient fuel injection or no fuel
injection during the fuel supply.

Removal and disassembly

Numbers in parentheses refer to Fig.6.
1. Position the vehicle in a level work area,
ensure the body is fully lowered, apply the
parking brake and switch off the engine.
2. Remove mounting bolts (2), washers(3),
lockwashers(4) and nuts(5) securing
accelerograph controller base.
3. Disconnect wiring harness from the
accelerator pedal. Remove accelerator pedal

from cab floor.

Inspection

Check all brackets and frame for cracks and/
or damage. Repair or replace as necessary.

Assembly and installation

Numbers in parentheses refer to Fig.5.

Note

:Tighten all fasteners without special

torques specified to torques listed in Section
36.2, STANDARD BOLT AND NUT TORQUE
SPECIFICATIONS.
1. Connect wiring harness.
2. Position pedal assembly on cab floor and
secure with bolts (2), washers(3) lockwashers
(4) and nuts(5).

Cab Accessories

Overview

Evaporator serves to make gas-liquid two-
phase coolant after reducing pressure by
regulating flow evaporate and gasify into
coolant vapor through absorbing the heat of

air which flows over the surface of evaporator,

so as to reduce the temperature of the air and
thus realize the goal of cooling.

Caution

1. After the evaporator assembly is installed,
the barrier is present at the air intake and
return ports, and the unsmooth air intake and

return lead to the low air flow and insufficient

refrigeration.

2. Evaporator assembly is not installed firmly

and thus shakes in the later period, further
leading  to  leakage  of  air  and  condensate
water.
3.  Evaporator  assembly  is  not  properly
grounded and the system does not operate.
4.  Twisting  or  blockage  occurs  to  the
blast  pipeline  connected  to  the  air  port  of
evaporator, and this results in low air volume

and insufficient refrigeration.

Removal and disassembly

Numbers in parentheses refer to Fig.6.
Park the truck in a proper way.
Before  dismantling  evaporator  assembly,
make sure that the water valve at the water
inlet tube of evaporator assembly is closed.
Remove all line plug connectors of evaporator
assembly and mark them successively.
Remove the throat collars at all air outlets of
evaporator assembly, and mark all removed air
ducts. Remove the throat collars for two water
pipes of evaporator assembly. After these two
water pipes are marked respectively, separate
these two water pipes from the evaporator
assembly. Caution: a small amount of engine
coolant  will  flow  from  the  heating  core  of
evaporator during this process.
Generally, it isn’t recommended to dismantle
the  storage-rubber  pipe  components  and

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steam-pressure  rubber  pipe  components
connected  to  the  evaporator  assembly.
Otherwise, cold coal inside air conditioning
system will leak out. If storage-rubber pipe
components  and  steam-pressure  rubber
pipe components need to be disassembled,
they should be marked properly. Two rubber
pipes should be plugged promptly with choke
plug after dismantling so as to prevent air
conditioning system from contamination.
Completely remove the bolt (2) and washers
(3

、

4) fixing the evaporator assembly onto

the driver’s cab bottom. Meanwhile, remove
two flow hoses on the bottom of evaporator
assembly. If necessary, evaporator can be
further disassembled.

Detection

Check whether all connections are reliable
and whether any damage occurs to lines and
pipelines. Repair or replace it timely if any.

Assembly and installation

Numbers in parentheses refer to Fig.6

Caution

:Tighten all the fasteners to the

standard  torque  according  to  section
' T E C H N I C A L   C O N D I T I O N S   F O R
TIGHTENING TORQUES  OF  STANDARD
BOLTS AND NUTS' of the manual.
Install  two  removed  flow  hoses  onto
corresponding  positions  of  evaporator
assembly and fasten them with throat collar.
Fix  the  evaporator  assembly  onto  the
corresponding positions of the bottom of the
driver’s cab with bolt (2) and gaskets (3, 4).
Install and restore all line plug connectors
disassembled  to  the  designated  positions
according to signs made during disassembly.
Install the two disassembled water pipes to
corresponding connectors according to signs
and fasten them with throat collar.
Install  all  disassembled  blast  pipes  to
corresponding air port according to signs and
fasten them with throat collar.

Cab Accessories

8.1.6 Harness of cab

Descriptions

The  harness  of  cab  refers  to  the  wiring
c o m p o n e n t s   o f   i n d i v i d u a l   e l e c t r i c a l
components and control cabinets in the  cab.
It consists of the insulation shields, terminals,
wire,  and  insulation  wrapping  material. To
facilitate the installation and maintenance and
ensure the operation of electrical equipments
in the worst conditions, integrate the wire with
different specifications and colors used by
individual electrical equipments in the whole
truck by properly arranging them, and use
the insulation material to bundle the wire to
the harness. In such a way, it achieves the
integrity and reliability. The rear part of cab
harness is connected to the control board via
the 31-pin and 32-pin electrical connections
and  its  front  part  is  connected  to  various
electrical components in the cab via various
connectors.

Removal and Installation

The harness of cab is installed on the bottom
of cab. It enters the cab via the front and

rear wear wallboards. It is fixed and installed

by using the wire clamps and cable ties. To
dismantle the harness of cab, remove the 31-
pin and 32-pin connectors connected to the
control cabinet in the rear part of harness at
first. Then remove the connectors connected
to various electrical components in the front
part. Subsequently, remove the front and rear
wear wallboards, wire clamps and cable ties.
Then, the harness of cab can be removed at
the moment.
Installing new cab harness type should be
consistent with the original model. The wire
terminal and the wire should be reliably
connected. Individual connectors and the can
be gently pulled by hands to check them for
looseness and disengaging. Compare the
new harness with the original harness. For

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example,  the  dimension,  connectors,  wire
marking and etc. of wire harnesses should be
consistent. Any suspicious point can be tested
with the multimeter. The replacement can be
performed only after it is confirmed that the
harness is intact. The connectors, covers and
sockets of individual electrical equipments
should correspond to the sockets and covers
on  the  harness. After  the  individual  wires
are connected to the electrical components,
a  certain  margin  should  be  reserved,  not
tensioned or slackened.
For  the  inspection  and  connection  test
of  circuits,  after  the  harness  is  replaced
completely, check whether the connectors and
electrical components are connected correctly

at first.

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8.1.7 Switches and instruments

Operating equipment and control panel

12 13

●

9 10

Air conditioner control

Colum switch

Ignition switch

Gear shift lever

Radio

cab coping lamp

Fig.1

1. Combination instrument

12. Screw

23. Rocker switch

2. Cigar lighter

13. Plug 35-core

24. Rocker switch

3. Botton of solenoid valve for body stably control

14. Rocker switch frame

25. Rocker switch

4. Emergency stop switch

15. Rocker switch

26. Rocker switch

5. Monitor

16. Switch cover plate

27. Rocker switch

6. Control box

17. Retarder lever

28. Rocker switch

7. 20-meter signal-line

18. Buzzer

29. Rocker switch
middle frame

8. Through-wallplate assembly

19. Nut

9. Control plate install

20. Nut

10. Central distribution case

21. Body control lever

11. GPS

22. Rocker switch

Cab Accessories

SANY SRT95C Off-Highway Truck. Service Manual - page 18