Great Wall Hover. Manual - part 57

Replacement of drive gear oil seal of front reducer assembly

1. Support the front of car; remove the left and right

front wheel and the beam under the reducer.

2. Drain the lubricant oil in the front reducer; remove

the left and right steering knuckle

3. Disconnect the front reducer assembly flange from

the drive shaft and use the jack to remove the front

drive axle

Caution: Make the assembly mark on the reducer and

drive shaft before separate them.

4. Remove the front differential assembly

(Caution:  Drain the oil in front differential before the

disassembly)

front reducer

assembly

washer

spacer 

drive

bevel gear

bearing

oil seal

front reducer drive gear flange,

main gear flange and dustproof

cover assembly

Used component which can not be used

any more.

N 

m:

 specified torque

assembly mark

5. Remove the drive gear flange and dustproof cover

assembly

a. Use the hand hammer and chisel to loose the riveted part on

      nut.

b. Use the special tools to clamp the drive gear flangeandremove

      the drive gear nut.

c. Use the cooper bar to knock down the drive gear flange and

     dustproof cover assembly.

6. Remove the drive gear oil seal

Use the special tools to remove the oil seal; do not

damage the inner wall of reducer housing.

7. Install the new drive gear oil seal

a. Use the special tools to knock into the new oil seal.

b. The top of the oil seal is level to the top of reducer housing.

Caution: Coat the oil seal lip with the lithium base grease and

the oil seal should be in correct position.

special

rotate the wrench in clockwise.

special

special

8

Install the drive gear flange and dustproof cover

     assembly

a. Match the drive gear flange and dustproof cover assembly on

      the front drive gear.

b. Coat the new nut with the lithium base grease.

c. Use the special tools to clamp the flange and tighten the nut

      to the specified torque.

Tighten torque:140-160N.m

a. Use the torque meter to measure the pre-applied load of the

gap between the drive bevel gear and driven bevel gear.

 pre-applied load:  1.2-1.7N.m

b.   Is should be replaced by the thicker washer if the pre-ap

          plied load is more than specified value

(The step of thickness of washer is 0.03mm)

c. Is should be replaced by the thinner washer if the pre-applied

load is less than specified value. Repeat the previous

operation until meet the requirement.

Caution: Do not reduce the load by loosing the nut.

10.  Check the axial and radial run-out tolerance

       offlange.

a. Use the dial indicator to measure the axial runout of flange.

  Max. axial runout: 0.1mm

b.   The max. radial run-out tolerance is 0.1mm

It should check the bearing if the radial run-out tolerance is large.

9

Adjust the pre-applied load of the drive

      bevelgear bearing

11

Rivet the drive gear nut after meet the previ-

ous requirements.

12

Install the reducer assembly on the front drive

axle assembly and assemble the front drive shaft

assembly (refer to Assembly of Front Reducer Assembly

and Assembly of Front Drive Shaft Assembly)

13

Install the oil drain plug; screw off the oil

filling plug and filled with the hypoid gear oil.

Tightening force of oil drain plug: 30-35N

m

Model of lubrication oil: GL-5

Filling amount: Flush to the lower edge of oil filling open

14

Insert the oil filling plug washer and tighten

the oil filling plug to the specified torque.

Specified torque : 140-150N

m

15

Install the front drive axle assembly on the

carriage.

16

Connect the drive shaft to the flange

a. Align the assembly mark; use four bolts and nuts to connect

the flange of drive shaft and front drive axle.

b.Tighten the nut to the specified torque.

specified torque:

Remarks: Keep the clean of the field during the maintenance.