Great Wall service chassis and body Manual - part 29

SA-12

6.

Inspection and replacement for front brake disc

(a)

Check the wear situation of the front brake disc. (see Dr

the brake caliper).

(b)

Use the spanner to tear down the bolts that connect the

front wheel hub and the front brake disc.

(c)

Connect the front wheel hub and the front brake disc with

bolt and spring washer, and screw up the bolts with a

moment spanner to the specified torque in the diagonal

order.

Fastening torque

(60-79)N
m

(d)

Conduct the equilibrium test on the dynamic balancer,

the amplitude value displayed should not be larger than

13.5g under the condition that the measuring rotating

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

786 r/m, when the amplitude value is larger than 13.5 g,

encase the counter balanced clip, which is 4 g each, at the

corresponding phase, the number of the clip encased

should not be more than four.

7.

Bearing outer race change

Press in the new bearing outer space with the special service

tools.

Notice: the bearing inner and outer races should be changed at

one time.

Assembly of Front Wheel Hub

1.

Mount on the Bearing 32007 inner race and roller assem-

bly as well as the front wheel hub oil seal.

Coat the lithium base grease of (4-5)mm on the inner surfaces

of bearing outer race and the front wheel hub, encase the

Bearing 32007 inner race and roller assembly, plaster the

lubricant again. Coat a little lubricant on the lips of front wheel

hub oil seal and then tap it in place.

Notice: do not make the lubricant contact the front brake

disc face.

2.

Mount on the Bearing 32007 inner race.

After coating the bearing outer race with the lithium base

grease of 4-5 mm, encase the inner race and roller assembly of

Bearing 30205, and plaster the lubricant again.

Suspension System and Automobile Axle (Dr/2WD) 

 Front Wheel Hub and Steering Knuckle (Front Wheel Hub)

SA-13

3.

Mount the front wheel hub on the steering knuckle.

Coat a little lubricant at the position of the steering knuckle

where the oil seal locates, mount the front wheel hub and front

brake disc on the steering knuckle, and then mount on the stop

washer.

4.

Preload adjustment

(a)

Mount on the lock nut and screw up according to the

specified torque.

Fastening torque

(130-150)N
m

(b)

Run the front wheel hub about 1/4-1/3 of circle, and

combine it with the bearing seat.

(c)

Loosen the locking nut to ensure the front brake disc run

freely, and then screw up the nuts to the specified torque.

Fastening torque

(25-35)N
m

(d)

Hook the front wheel hub with the spring-tension meter

and pull the spring-tension meter slowly in the tangential

direction of this spot.

The reasonable range of tension force: (16-33)N.

Remark: if the tension force is larger or smaller of the reason-

able range, screw up the nuts again until the tension force falls

within the reasonable range.

(e)

Measure the bouncing value of the front brake disc,

which should not be larger than 0.11mm.

5.

Mount on the lock cover and the split pin

Suspension System and Automobile Axle (Dr/2WD) 

 Front Wheel Hub and Steering Knuckle (Front Wheel Hub)

SA-14

6.

Tap in the front wheel hub with a rubber hammer

7.

Mount the brake caliper on the steering knuckle.

Fastening torque

(85-105)N
m

Steering Knuckle

Disassembly of Steering Knuckle

1.

Take apart the brake caliper, the front wheel hub and the

front brake disc.

2.

Take apart the front brake shell:

(a)

Tear down the two bolts (M8X16).

(b)

Tear down the two split pins, grooved nuts, washer and

bolts that connect the steering knuckle arm.

3.

Tear down the steering knuckle

(a)

Support the lower arm with jack;

(b)

Tear down the two split pins and the grooved nuts

(c)

Disconnect the steering knuckle from the upper and

lower ball studs and take apart it.

Inspection on Steering Knuckle

Check the steering knuckle

Check the steering knuckle with the dye penetration agent to

see whether the steering knuckle has a crack or not.

If the crack is found, the steering knuckle is required to be

changed.

Suspension System and Automobile Axle (Dr/2WD) 

 Front Wheel Hub and Steering Knuckle (Front Wheel Hub)

SA-15

Mount the steering knuckle

1.

Mount the steering knuckle

(a)

Support the lower arm of the steering knuckle with a jack.

(b)

Mount the steering knuckle on the lower ball stud and

screw on the nuts.

(c)

Press the upper arm to mount on the steering knuckle and

screw on the nuts.

(d)

Screw up the nuts of the upper ball stud according to the

specified torque.

Fastening torque

(100-120)N
m

(e)

Screw up the nuts of the lower ball stud according to the

specified torque.

Fastening torque

(98-118)N
m

(f)

Mount on the split pin between the upper and lower ball

studs.

2.

Mount the steering knuckle arm and the front brake shell;

(a)

Screw up the two bolts of M8X16.

Fastening torque

(25-28)N
m

(b)

Screw up the two bolts and groove nuts (M12X67) to the

specified torque.

Fastening torque

(98-118)N
m

(c)

Mount on the two split pins.

In case the pin hole in the ball stud are not in alignment with

the groove nut, adjust the fastening torque and the rotating

angle under the condition that satisfying the minimum torque,

so as to ensure the torque falls within the specified range, if

cannot, mount the split pin with the minimum torque beyond

the range

3.

Mount the front wheel hub and the front brake disc.

4.

Check the Alignment of Front Wheel.

(See SA-3)

Suspension System and Automobile Axle (Dr/2WD) 

 Front Wheel Hub and Steering Knuckle (Front Wheel Hub)