air GREAT WALL DEER 2006 Workshop Manual

BR-41
9. Check the clearance between the brake shoe and the
brake drum:
(a) Tear down the brake drum.
(b) Measure the inner diameter of brake drum and the outer
diameter of brake shoe, then Check the difference of the
two diameters to see whether it falls within the standard
clearance range.
Shoe clearance: 0.6mm
If it is not correct, check the parking braking system.
10. Mount the brake drum and rear wheel;
Fastening torque
(145
10)mm
11. Fill the liquid container with brake liquid and exhaust
air in the braking system.
12. Check to see whether there is leakage of brake liquid Braking System
Rear Brake (SF)

BR-42Braking System
Load Sensing Proportion Valve
Load Sensing Proportion Valve
Element figure
Inspection on and Adjustment of hydraulic
pressure
1. Adjust the load on rear shaft
Load on rear shaft (including the vehicle weight): 800kg
2. Mount the load sensing proportion valve instruments
(SST) and exhaust the air.
location plate
valve bracket
load inductive valvebraking hose bracket
flat washerflat washer
load inductive spring
assembly
inductive spring bracketclaming head I
claming head II

split pin
shaft bush

Parts that cannot be reused after being usedsnapping ring

BR-45Braking System
Load Sensing Proportion Valve
6. Exhaust the air in braking system
7. Check and adjust the hydraulic pressure of load
sensing proportion valve.

SR-2
Notice
The parts change should be conducted correctly because
any error will affect the properties of steering system, or lead
to accidental or damage when driving.
Troubleshooting
Trouble Causes Inspection items
Unsuitable tire inflation
Insufficient lubricant
Over-large inclination
Steering gear joint wear
Lower swing arm ball head wear
Steering column seize-up
Steering gear unsuitable adjustment or damage
Power steering conveyer looseness
Over-low liquid level in oil cup of steering pump
Failure in power steering mechanismInflate the tire to specified pressure
Lubricating the hanging devices
Check the Alignment of Front Wheel
Change the Steering gear joint
Change the lower swing arm ball
head;
Check the steering column
Adjust or repair the gear.
Adjust the conveyor.
Check the steering pump oil cup
Check the power steering devices
Poor returning
Unsuitable tire inflation
Insufficient lubricant
Incorrect wheel alignment
Steering column seize-up
Steering gear unsuitable adjustment or damageInflate the tire to specified pressure
Lubricating the hanging devices.
Check the Alignment of Front
Wheel
Check the steering column
Change the steering gear.
Over-large playFront wheel bearing wear
Steering drive shaft yoke wear
Lower swing arm ball head wear
Steering gear joint wear
Steering gear unsuitable adjustment or damageChange the front bearing
Change the steering drive shaft
Change the swing arm ball head
Change the steering gear joint
Change the steering joint
Abnormal noise
Steering drive lever looseness
Steering gear joint wear
Steering gear unsuitable adjustment or damage
Oil lack or poor sealing of steering machine.Tighten the steering drive lever
Change the steering gear joint
Change the steering gear
Add the oil or change the sealing
washer Steering system inspection
on vehicle.
Steering System
Notice and Troubleshooting
Difficulty in steering

SR-3Steering System
On-vehicle Inspection
max play
On-vehicle Inspection
Steering wheel play
1.SR-18Check to see whether the steering wheel play is
correct;
Park the vehicle stably and align the tires in correct direction,
press the steering wheel with finger and swing it in left and
right direction. The play should not exceed the max play.
(Max play)
6
(Dr SF)
If the play is nor correct, adjust or repair the steering wheel as
requirement.
2. Adjust the steering wheel play:
(a) Align the wheel forward precisely;
(b) Loosen the locking nuts of steering gear;
(c) Rotate the adjusting screws of steering gear clockwise to
reduce the steering wheel play, while contrarotate the
adjusting screws to increase the steering wheel play.
Remark: screw the adjusting screws and enlarge the play a
little each time to check the adjusted play.
3. Check to see whether there is steering inconvenience
Rotate the steering wheel by half round in right and left
direction to check whether the play is correct, and whether the
wheel runs smoothly or any seize-up in its running.
4. Fix the adjusting screws and fasten the adjustable nut.
Oil level height
Check the oil level height in the steering gear housing.
Oil level height: flush with the filler opening.
If there oil is insufficient, add the gear oil and check to see
whether there is oil leakage.

SR-6Steering System
Steering Column
Dismantle of the steering wheel
1. Dismantle of the steering wheel;
(a) Take down the bugle cap;
(b) Pull down the bugle wire.
(c) Tear down the fixing nut of steering wheel.
2. Tear down the combined switch cover;
3. Tear down the cover at left bottom part.
4. Tear down the fixing bracket for the left-bottom cover.
5. Tear down the air passage;
6. Tear down the combined switch;
7. Tear down the fixed support seat bolts on front-wall panel;
8. Tear down the fixing bolts at upper part of steering
column, and
9. Tear down the connecting bolts of steering column
drive shaft.
10. Pull out the steering column.

SR-12Steering System
Power Steering (Introduction)
Suggestion on maintenance
The failure of power steering system usually relates to the
steering difficulty due to lack of supplementary force. In such
case, it is the first to verify the problem is produced by the pump
or steering gear when repairing. In doing so, the problem can be
checked on vehicle with the pressure meter.
On-vehicle Inspection
As the power steering is a hydraulic pressure device, its
trouble usually caused by the lack of specified hydraulic
pressure or the abnormal work of control valve. As a result, it
cannot acquire the moderate hydraulic pressure.
In case the problem is caused by the pump, the steering
wheel will deflect toward right or left. On the other side, if the
problem is caused by control valve, when the steering wheel
rotates to left or right, the steering will become more difficult
due to the unequal supplementary force. However, when there
is wear on the piston sealing ring of power cylinder, it also cause
the hydraulic pressure loss that may lead into steering difficulty
toward right or left.
Before making inspection on vehicle, verify the power
steering system firstly to see whether there is air. If any, the air
volume will increase with the variation of hydraulic pressure,
which will cause the hydraulic pressure fluctuation that makes
the power steering work abnormally. In order to verify whether
there is any air in the system, check whether the liquid level
varies or not when the steering wheel rotates completely toward
the right or left. For instance, if there is air in the system, the air
will be compressed, which will reduce the liquid level
remarkably, when the steering wheel rotating. If there is no air
in system, the liquid level variation is very small even though
the hydraulic pressure increases. This is because the liquid
volume will not varies when being compressed. And the small
liquid level variation is caused by the expansion of hose
between the pump and steering gear when the hydraulic pres-
sure increasing.
Meanwhile, the air in system sometimes will cause the
pump or steering gear produce noise when the steering wheel
rotating completely toward a certain direction. After checking
or exchanging the pump or steering gear, the on-vehicle inspec-
tion should be often conducted to guarantee the normal work of
power steering system.

SR-13Steering System
Power Steering (On-Vehicle Inspection)
tensioning wheelpower steering oil
pump
crankshaftOn-vehicle inspection
Inspection on tension of driver conveyor
Measure the tension of drive conveyor.
Drive conveyor tension: under the condition of 98 N.
New conveyor: (5-7)mm
Old conveyor:
(7-9)mm
Remark:
ìnew conveyorî means the conveyor that is used on the
machine less than five minutes;
ìold conveyorî means the conveyor that is used on machine
more than five minutes
Check for height of liquid level
1. Keep the body in horizontal status
2. Increase the liquid temperature
When the engine runs idly by 1000 r/m or less, rotate the
steering wheel several times from the locking position to the
reverse locking position to increase the liquid temperature.
3. Check to see whether there is foam or emulsification;
Remark: the foam or emulsification shows there is air in the
system or the liquid level is over-low.
4. Check the liquid level height in oil cup;
Check the liquid level height and, if needed, add the oil.

SR-14Steering System
Power Steering (On-Vehicle Inspection)
Change of power steering liquid
1. Tear down the oil-returning hose from the oil cup to
drain the liquid into the container;
2. Run the engine in the idle status, and rotate the
steering wheel toward the max rotating angle for
several times in right or left direction while draining the
liquid, until the oil in steering liquid is drained up.
3. Turn off the engine.
4. Connect the oil-returning pipe and inject the new
power steering liquid in the liquid tank;
Hydraulic oil type: No.8 Liquid drive oil (Q/SH003.01.012-88)
5. Start the engine, and make it running in the idle status.
Rotate the steering wheel to the max rotating angle repeatedly
several times, meanwhile, supplement new power steering
liquid in the liquid tank until there is no foam or turbidities in
the liquid tank, and the oil indicating lamp reaches the marked
range when the engine is turned off.
6. Tighten the liquid tank cover
7. Exhaust the air in the power steering system;
Ai-r bleeding in power steering system
1. Check the liquid level height in the liquid tank
Check the liquid level and, if needed, supplement the liquid.
2. Start the engine in the idle status and rotate the
steering wheel repeatedly to the max rotating angle
several times.
3. Turn off the engine and connect the ethane pipe and
bleeding plug.
4. Start the engine and rotate the steering wheel
repeatedly to the max rotating angle several times.
5. Locate the steering wheel at the intermediate position.

SR-15Steering System
Power Steering (On-Vehicle Inspection)
6. Exhaust the air in steering system:
(a) Loosen the bleeding plug;
(b) Screw up the bleeding plug when there is no air bubble
exhausted from the pipeline.
Notice: take care not let the ethane pipe slide from the
bleeding plug, because the liquid is high in temperature
and pressure.
7. Check to see whether there is air bubble or turbidities
in the oil cup, and ensure the liquid level will not
exceed the max value when the engine stops,
Measure the liquid height under the condition of engine running,
then turn off the engine and measure the liquid height again.
In case any problem is found, repeat the approaches of (5) and
(6) in Power Steering Liquid Change. If the problem still
exists, repair the power steering oil pump.
RPM RPM