Great Wall service chassis and body Manual - part 47

SA-84

On-vehicle Change of main-teeth oil seal

1.

Disconnect the drive shaft from the speed reducer:

(a)

Mark the assembly mark on the two flanges;

(b)

Tear down the four sets of bolt and nut.

2.

Tear down the flange and dust cover assembly.

3.

Tear down the oil seal.

Tear down the oil seal with SST.

4.

Mount on the new oil seal:

(a)

Coat the lithium base grease on the lips of oil seal;

(b)

Tap in the new oil seal with SST.

Remark: tap the new oil seal until it is in place.

5.

Mount the flange and dust cover assembly.

6.

Screw up the nut to the specified torque.

Specified torque: (140-160)N

m

7.

Rivet the nut.

8.

Connect the drive shaft flange with the speed reducer

flange:

Align the assembly mark and connect the flanges with bolts.

Tightening moment

(69-79)N
m

9.

Check the oil level of the speed reducer.

Change the gear oil where necessary.

Oil brand: heavy-duty oil of grade 

GL-5

Oil volume: add the oil until it overflows from the oil filler

outlet.

Viscosity: SAE 85W/90

Suspension System and Automobile Axle (Rear) 

 Rear Speed Reducer

SA-85

Dismantle of Rear Speed Reducer

1.

Take out the oil drain plug to drain the oil in the speed

reducer up.

2.

Tear down the rear axle shaft.

3.

Disconnect the drive shaft from the speed reducer.

4.

Tear down the nuts on the bolts that connect the rear axle

housing and the speed reducer.

5.

Tear down the rear speed reducer.

Disassembly of Rear Speed Reducer

Remark: in case the noise is over loud, the following item

should be checked before taking apart it to find out the causes.

If the speed reducer has serious drawback, take it apart for

repairing where necessary.

1.

Check the play between the axle driven bevel gear;

In case the play value fails to be within the specified range,

adjust the preload of bearing 200719E or repair it where

necessary.

(see page SA-91)

Standard play: (0.13-0.25)mm

2.

Check the teeth engagement of the driving bevel gear

with the axle driven bevel gear.

(See Page SA-92)

Record the teeth engagement positions.

3.

Check the clearance between the half-shaft gear thrust

gasket and the differential housing.

Check the clearance between the half-shaft gear thrust gasket

and the differential housing with the feeler.

Standard clearance

(0.45-0.75)mm

Remark: in case the clearance value fails to fall within the

above range, change the half-shaft gear stop gasket, and

ensure the half-shaft gear stop gaskets on the left and right

sides are same in thickness.

(See Page SA-95)

Suspension System and Automobile Axle (Rear)

(Dismantle of Rear Speed Reducer)

SA-86

4.

Tear down the differential and the axle driven bevel gear:

(a)

Mark the assembly marks on the differential bearing

cover and the speed reducer housing.

(b)

Tear down the stop gasket and take down the adjusting

ring.

(c)

Loosen the double-stop washer and screw off the nut to

take down the differential bearing cover.

(d)

Tear down the differential and axle driven bevel gear

from the rear speed reducer.

(e)

Tear down the outer race of bearing 200719E.

5.

Tear down the flange and dust cover assembly:

(a)

Loosen the riveted part of the nut with hammer and

chisel;

(b)

Lock the flange with SST to tear down the nuts.

Notice: those nuts should not be reuse.

left

right

(c)

Tear down the flange and dust cover assembly with

copper bar.

Suspension System and Automobile Axle (Rear) 

(Dismantle of Rear Speed Reducer)

Remark: mark the label on the parts to clarify the position for

re-assembling

SA-87

6.

Tear down the oil seal and oil-guard tray:

(a)

Support the face at the teeth end of the driving bevel gear

to tear down the oil seal with SST.

(b)

Take out the oil-guard tray.

7.

Tear down the inner race and roller assembly of bearing

7306E;

Tear down the inner race and roller assembly of bearing 7306E

with SST.

8.

Tear down the driving bevel gear;

Tear down the driving bevel gear, which is mounted with

adjusting washer and inner race of bearing 7306E, together

with another adjusting washer and jacket

9.

Change the bearing 7306E:

(a)

Press out the bearing from the driving bevel gear with

pressure machine and SST.

(b)

Mount the new inner race and roller assembly of bearing

7306E on he driving bevel gear with pressure machine

and SST.

Suspension System and Automobile Axle (Rear)

(Dismantle of Rear Speed Reducer)