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Great Wall service chassis and body Manual - part 33

SA-28

Suspension System and Automobile Axle(SF/2WD)

Front Suspension

locking ring

cushion block

nut

locking ring

cushion block

upper arm

transverse stabilizer rod

bolt

transverse stabilizer rod gasket

rubber
snubber washer

restrictor tube

Brake

caliper

steering knuckle

brake oil pipe bracket

steering

knuckle arm

brake shell

dust cover

oil seal -front hub

front wheel

bearing(inner)

front wheel hub and

front brake disc

stop washer

lock plate

front hub bearing

(outer)

steering knuckle nut

liner

lower

ball stud

Parts that cannot be reused after being used

:specified torque

135-155

70-90

132-152

20-26

180

127-147

132

152

123

shock absorber

steering knuckle

outer flange cap

Front wheel hub and steering knuckle

Element figures

SF2WD

stabilizer rod gasket

rubber snubber
washer

stabilizer rod gasket

SA-29

Front Wheel Hub

Disassembly of Front Wheel Hub

Tear down the brake caliper.

(a)

Tear down the brake Bundy tube from the brake caliper,

and block the Bundy tube line with a cork.

(b)

Tear down the brake caliper from the steering knuckle.

Tear down the steering knuckle outer flange cap.

Tear down the front wheel hub and brake disc.

(a)

Open the lock plate with a screwdriver.

(b)

Tear down the steering knuckle nut with the SST tools to

take out the. lock plate

(c)

Tear down the other steering knuckle nut with SST tools

to take out the stop washer and the steering knuckle outer

bearing.

(d)

Tear down the front wheel hub and the brake disc

assembly.

Tear down the front hub, oil seal, front hub bearing

(inner) inner race and roller assembly.

(a)

Pry out the oil seal.

Notice: the deformed oil seal should not be reused.

(b)

Take out the front hub bearing (inner) inner race and

roller assembly.

Suspension System and Automobile Axle (SF/2WD)

Front Wheel Hub and Steering Knuckle (Front Wheel Hub)

SA-30

Front hub bearing outer race inspection and change

(a)

Check each bearing

Wash the inner and outer races of each bearing, and check

them whether they are wearied or damaged.

(b)

Tear down the outer race of each bearing.

Tap out the bearing outer race with copper bar and

hammer.

Notice: bind the dismantled inner and outer races of

bearing together to prevent from mixing.

Front brake disc inspection and change

(a)

Check the wear situation of front brake disc.

(b)

Tear down the bolts that connect the front wheel hub and

front brake disc.

(c)

Connect the front wheel hub and front brake disc and

screw up the bolts with moment spanner to the specified

torque diagonally

Fastening torque

(70-80)Nm

(d)

Conduct the dynamic balance test on the dynamic balancer,

the amplitude value displayed should not be above 13.5g

under the condition that the measuring rotating velocity

is 796 r/m and the locking rotating velocity 786 r/m,

otherwise, tap in the counter balanced clip, which is 4g

each, at the corresponding location, the number of the

clip should not be more than 4.

(e)

Tap in the new bearing outer race with the special service

tool.

Notice: the inner and outer races of bearing should be

changed in set.

Assembly of Front Wheel Hub

Mount on the inner race and roller assembly of front hub

bearing (inner) as well as the front hub oil seal.

Coat the lithium base grease of 4 to 5 mm on the inside surface of

the bearing outer race and front wheel hub, and plaster the

lubricant in the front hub bearing (inner) and the roller assembly.

Coat a little lubricant on the lips of oil seal of front wheel hub, and

then tap the oil seal of front hub in place with special service tool.

Notice: do not coat the lubricant on the front brake disc face.

Suspension System and Automobile Axle (SF/2WD)

Front Wheel Hub and Steering Knuckle (Front Wheel Hub)

SA-31

Mount on the inner race and roller assembly of front hub

bearing (outer).

After coating 4 to 5 mm lithium base grease on the outer race

of bearing, put in the inner race and roller assembly of front hub

bearing (outer), and then plaster the lubricant.

Mount the front wheel hub and front brake disc on the

steering knuckle.

Coat a little lubricant on the steering knuckle where the oil seal

locates, and mount the front wheel hub and front brake disc on

the steering knuckle, then mount on the stop washer.

Adjust the preload

(a)

Mount on the steering knuckle nut and screw up them

according to the specified torque.

Tighten torque: (100-120)N

(b)

Run the front wheel hub about 1/4-1/3 round, and seat the

bearing.

(c)

Loosen the steering knuckle nut to ensure the front brake

disc can run freely. Screw up the steering knuckle nut

again according to the specified torque.

Fastening torque

25Nm

(d)

Mount on the lock plate and another steering knuckle nut.

Tighten torque

60Nm

(e)

Hold the front wheel hub bolts with a spring-tension

meter and drag the meter slowly in the direction of the

tangent line of this spot.

Suitable tension range: (29-54)N

The nuts should be retightened until falls within the suitable

range if the tension force is overlarge or over small.

(f)

Check the bearing and ensure that the clearance, which is

not larger than 0.05 mm, is not excessive.

(g)

Measure the bouncing value of the front brake disc face.

Bouncing value should not be above o.11mm.

Suspension System and Automobile Axle (SF/2WD)

Front Wheel Hub and Steering Knuckle (Front Wheel Hub)

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