Page 308 of 425

Brake-22
2. Install the piston gasket in the tong body.
a. Screw the bleed screw into the bleed hole;
b. Install the square gasket in the sealing groove of two cylinders of
pump respectively after coat its working surface with proper
rubber lubricant.
Tightening torque 7
10Nm.
3. Connect the brake pipeline
Connect the brake oil pipe to the tong.
Tightening force: 50
5Nm
4. Fill up the brake system with the brake fluid and drain the air
in the brake system.
5. Check for leakage of brake fluid.
Rear parking brake
pull-out piece
spring draw bar
hand brake
stay wire
front brake shoe
lower tension spring
clearance-adjusting bolt
clearance-adjusting gear
clearance-adjusting
bolt head
pull-out piece
spring seat
pulling arm pin
rear brake shoe
brake shoe pulling arm
saddle type washer
push pedal
push pedal
release spring
stopper
upper release spring
rear brake disc
Used component which can not be used any more.
Removal of rear brake
Remarks: When the brake torque of the hand brake cannot meet
the brake requirement, the thickness of the brake shoe gasket
shall be tested. If it is less than the minimum value of brake show
gasket, the brake shoe shall be replaced.
minimum thickness: 1.0mm
Page 314 of 425
Brake-28
10. Adjust the clearance between the brake drum and brake shoe.
Poke the adjusting hole plug on the brake drum, insert the screwdriver
into the clearance-adjusting hole; rotate the clearance-adjusting gear
to expand the brake shoe until the brake disc can not be rotated by
hand. Then rotate it for 3-5 teeth in anticlockwise, rotate the brake
disc by hand at the same time, it is proper that it can rotate freely
and without the contact between the abrasion and disc. It is allowable
that the non-running-in brake shoe has the slight abrasion sensing.
When adjust the clearance, the left and right wheel must be adjust at
the same, install the adjusting hole plug after the completion of
adjusting .
11.Rear brake caliper assembly
12.Rear wheel assembly
Tighten torque :120N.m
Page 316 of 425
Brake-30
Replace of load-sensing proportional valve
1. Removal
Disconnect the brake pipeline form the valve; remove the lock nut and
remove the adjusting bolt from the suspension arm bracket; remove the
installation bolt and take off the load-sensing proportional valve assembly.
2. Installation
a. Use two installation bolts to fix the load-sensing proportional valve.
The bolt tightening torque is 23N
m,
b. Tighten the adjusting bolt locking nut,
c. Connect each brake pipeline.
The tightening torque of the connector is 16N
m,
d. Filled with the brake fluid, discharge the air from the brake system;
check the brake pressure and leakage. output manometer
input manometer
Page 324 of 425

Steering-5
Technical requirements
1.The fastening torque of the mounting bolts of the integral power
steering gear assembly is
2.The fastening torque of the connecting bolts of the steering drive sub-
assembly and the integral power steering gear assembly is
3. The fastening torque of the connecting bolts of the steering drive
assembly and the left horizontal beam of the frame is
4. The fastening torque of the mounting bolts of the power steering
pump is 40N.m.
5. The tension force of multi-wedge belt 4PK1100 is 4PK1100.
6. Centering fastening of the handwheel: steer the front wheel to the
right front and remove the handwheel without changing the position
of the steering stem, install the handwheel aligning the center, the
radials of the handwheel should be at the left & right centering state;
the symbol of “the Great Wall” on the steering wheel shall be in
driver’s straight view position, secure the nut firmly with the
fastening torque of
7. Inspection of free clearance of the handwheel
Steer the car in a straight direction and stop the engine, apply a 5N force to
the handwheel along the circumference, left turn the handwheel and stop
the turning when the resistance is increasingly felt with each turn; then right
turn the handwheel and stop the turning when the resistance is increasingly
felt with each turn; the angle rotated along the circumference is the free
clearance of the handwheel, whose standard value shall be below 20
, and
the angle from the center to the right shall not be more than 10
Page 366 of 425

CD Player and Air Conditioning System-13
1 .CC6460K air conditioning system is designed with SD7V16 compressor, whose refrigeration oil type as
specified is SP-10P AG; hence application of other type of refrigeration oil may damage the parts and compo
nents of the compressor. When the
air conditioning system goes through maintenance and replacement of
parts, it should be added with new refrigeration oil, whose volume is listed as follows: the evaporator and
condenser: 30ml; the drier: 20ml; the pipeline: 10ml.
Addition of refrigeration oil can be available with two methods: The direct addition and the vacuum suction
2 .D irect addition method
a. remove the oil filler plug and fill with the specified SP-10P AG refrigeration oil.
b. observe through the hole of oil filter plug and rotate front plate of clutch to make the piston connecting rod right positio n in the
center of the hole of oil filter plug.
c. insert the dipstick along the right side of piston connecting rod till the top of dipstick touches the case of the compresso
r
d. pull out the dipstick and examine the graduations (grooves) of refrigeration oil, the readings shall be within the range of 4-6
scales
.
e. screw firmly the oil filter plug with the fastening torque of 14.7± 4.9N
.m
3. Vacuum suction method:
Firstly pump out the refrigerating system to the vacuum of 0.2x105Pa, and then fill with the specified 0.2x10 5 Pa refrigeration oil;
the detailed steps are as follows:
a. switch off the high-pressure manual valve and the auxiliary valve.
b. dismantle the high-pressure side hose from the manifold pressure gauge and insert it into the oil cu
p
c. open the auxiliary valve and have the refrigeration oil sucked into the refrigerating system from the oil cup.
d. when the refrigeration oil in the oil cup is almost pumped out to the vacuum, then immediately turn off the auxiliary valve
to
prevent the air from being sucked into the system
.
e. secure the hose adapter at high-pressure side to the manifold pressure gauge, start the vacuum pump and turn on the high-
pressure manual valve, then turn on the auxiliary valve to pump the system to the vacuum state of 0.2x10
5Pa, keep such state
for 15mins so as to discharge out the air flowing into the system along with the oil.
V ol ume of Refrigeration Oil Addition and its Methods
2.ai r h eating system
T r oubl e Cau ses o f the trouble
H e ati n g n otsuppl i ed or
no t s
uf f i cientl y suppl i ed 1.
blow erof air c ondition erf ai l u re 2.relay o f the blow erdamage
d
3. heati n g w ater pipe bloc k e d 4 . coo ling water p i pe b lock ed
5. col d/h ot damp erexecutor damage d 6. ins
uf f i cien t c oo ling l iqu id
N o rotation ofblow er 1.
f use burned
down orpoor contac t o f the switch
2. mo tor o f the blowe r burne d d ow
n
3. op en circ uit o f h igh- sp eed relay o f the blow er
4. speed-ad j usti n g m odule d am aged
5. short c ircu it
leak age o f w ater W ater p ipe o f ai rhe ati n g a ged, inse cu re j oi nt
O v erhe at 1.
speed-ad j usti n g r esi sto r o f the f an d am aged
2. col d/h ot damp erexecutor damaged
I nsu f f i cien t h otair
vo lume f or d efro stin
g 1.
mode executor dama ge
d
2. f al li n g o f fof the d riv e ro
d
3. damp ernot in p osi ti o
n
4. air v ent b l ock ed
5. inad equa te heatin g s
upply
6. inst
alla tion ofwind tunn elno t fi t
7. circ uit d i sco nn ecte
d
Page 370 of 425

CD Player and Air Conditioning System-17
Daily Maintenance of Air Conditioning System
In order to ensure normal operation of air conditioning system, maintenance and care services shall be frequently performed for the
air conditioning system. The daily maintenance of air conditioning system is illustrated as follows:
1. Inspect, wash and clean the condenser of air conditioning system, requiring that radiator pins are clean and there is no dirt
between the pins. After the car runs in the rain or on the muddy road, the fan of the condenser should be inspected to find
whether it bears the earth, sand, stone and etc, and remove them if any.
2. Check the quantity of the working media of the refrigerating system; when the compressor set works normally, observe the
liquid viewing glass, under the normal circumstance, there shall be not air bubbles in the glass.
3. Inspect the drive belt. The belt between the compressor and the engine should be tensioned.
4. Check if there is any abnormal noise or odor in the air conditioning system.
5. Check if the temperature difference between the air inlet and outlet of the compressor is normal.
6. Check if the hose of the refrigerating system is in an apparent good condition and connections of all joints are secure.
7. Check if the pipeline of the refrigerating system collides with other parts and components, and if there is any oil leakage trace
left at each joint.
8. Check if the circuit connection of the refrigerating system is secure and if there is an occurrence of short circuit and falling off
9. Check if fastening bolts of the compressor are firmly secured or broken. d. When connecting the pipe, apply little compressor oil to the O-ring and fasten the nut with two wrenches. Attention: never
spatter the compressor oil to the painted parts or the plastic components to avoid the corrosion. If these components are
spattered with the oil, please clean it immediately.
e. When connecting the pipe, please follow the torque listed in the following table to fasten the screws or the nuts:
Diameter of Pipe Fastening Torque (N·m)
¢8mm 12-15
¢16mm 30-35 30-35
At ends of each pipe the protective caps should be installed till the pipe is connected to the refrigerating system.
compressor oil fasten it by using two wrenches at the same time
Page 406 of 425
Appendix-1
A important parts assurance and request.........................................1
B non-metal materials consumption table.......................................12
C Special tools.............................................................................14
D important working regions and tightening torque
important working region............................................................17
E Electric wiring diagram ..............................................................18
Appendix
Page 407 of 425
Appendix A-1
Control item
fixing to the
232NmTorque wrench
Steel plate gauge 100mm
hexagon flange nut (Q32012)
hexagon flange nut (Q32012)
Control item
locate the
riage and fix it with
some bolts(Q32012),
90
10Nm.Torque wrench