Page 168 of 484
SA-57
1. Support up the front of vehicle to tear down the front
wheel and the steering knuckle.
2. Drain off lubricant in the front speed reducer.
3. Disconnect the front speed reducer flange and the drive
shaft.
Notice: Mark the assembly marks on the speed reducer
and the drive shaft before disconnecting them.
4. Tear down the front speed reducer.
5. Tear down the flange and dust cover:
(a) Loosen the riveted position on main-tooth nut with the
hammer and chisel.
Front Speed Reducer
Change of driving bevel gear oil seal of front speed reducer
front speed reducer and
differential assembly
oil-guard tray
driving bevel gear oil seal
flange and dust cover
140-210
Parts that cannot be reused after being usedspecified torque
NM
main-tooth nut
Suspension System and Automobile Axle (SF/4WD) Front Speed Reducer (Change of Driving Bevel Gear Oil Seal of Front Speed Reducer)
Page 169 of 484
SA-58
(b) Lock the flange with special service tool to tear down the
main-tooth nut.
7. Tear down the inner race of conical roller bearing;
If the bearing is damaged, change a new bearing.
8. Mount the new bearing.
6. Tear down the driving bevel gear oil seal and oil-guard
tray:
(a) Tear down the driving bevel gear oil seal with special
service tool.
(b) Tear down the oil-guard tray. (c) Tap down the flange and dust cover with copper bar.
Suspension System and Automobile Axle (SF/4WD) Front Speed Reducer (Change of Driving Bevel Gear Oil Seal of Front Speed Reducer)
Page 170 of 484

SA-59
12. Rivet the main-tooth nut.
10. Mount the flange and dust cover:
(a) Encase the flange and dust cover in the front speed
reducer shell through the clinch of oil seal.
(b) Lock the flange with the special service tool and screw up
the nuts according to the specified torque.
Fastening torque(140-210)Nm
11. Adjust the preload of driving bevel gear bearing
Measure the play preload between the driving bevel gear and
the driven bevel gear with the torque tester.
Preload:(1.8-2.4)Nm
Remark: if the requirement is not satisfied, change the
adjusting washer between the adjusting washer jackets and
bearing 32307, see the disassembly and assembly for front
speed reducer, until the requirement is satisfied.
(a) If the preload is larger than the specified value, change
with a thicker adjusting washer;
(b) If the preload is smaller than the specified value,
change with a thinner adjusting washer.
9. Mount the new driving bevel gear oil seal:
(a) Encase the oil-guard tray.
(b) Press the new oil seal in the speed reducer shell with the
special service tool; the mounted oil seal should be 1.5
mm away from the end face of the housing.
Notice: Coat the lithium base grease evenly on the lips of
oil seal.
Suspension System and Automobile Axle (SF/4WD) Front Speed Reducer (Change of Driving Bevel Gear Oil Seal of Front Speed Reducer)
Page 171 of 484
SA-60
13. Mount the front speed reducer assembly on the frame.
14. Connect the drive shaft to the flange:
(a) Align the assembly mark and then connect the drive
shaft and the front drive axle flange with four sets of
bolt and nut.
(b) Screw up the nuts according to the specified torque.
Specified torque(69-79)Nm
Suspension System and Automobile Axle (SF/4WD) Front Speed Reducer (Change of Driving Bevel Gear Oil Seal of Front Speed Reducer)
Page 174 of 484
SA-63
1. Tear down the front long semi-axis and the front minor
half-shaft
Pull out the front long and minor semi-axis from the front
speed reducer with tool.
2. Tear down the front drive axle shaft sleeve and screw off
the bolts connecting the half-shaft sleeve.
3. Tear down the oil seal - front half-shaft:
Tear down the oil seal-front half-shaft with the special service
tool.
Change of Axle Shaft Oil Seal
snapping ring
front minor half-shaft
front speed reducer and differential
oil seal-front half-shaft
front long
semi-axis
snapping ring
88
NMspecified torque
Parts that cannot be reused after being used)
Suspension System Automobile Axle (SF/4WD)Front Speed Reducer (Change of Axle Shaft Oil Seal)
Page 175 of 484
SA-64
5. Mount on the upper front drive axle shaft sleeve,
Coat the bolt thread with thread locking agent.
Fastening torque88Nm 4. Mount on the new oil seal-front half-shaft:
Press in the new oil seal with the special service tool until it
flush with the outer ending of the oil seal, coat moderate
lubricant on the lips of the oil seal.
6. Mount on the front long semi-axis and the front minor
half-shaft.
(a) Mount the new snapping ring on the half-shaft.
(b) Mount on the long semi-axis and the minor half-shaft
with the special service tool.
Suspension System Automobile Axle (SF/4WD)Front Speed Reducer (Change of Axle Shaft Oil Seal)
Page 177 of 484

SA-66
Disassembly of Front Speed Reducer
1. Tear down the speed reducer cover:
Screw off the eight bolts connecting the speed reducer cover.
2. Tear down the front long semi-axis and the front minor
half-shaft:
Tear down the front long semi-axis and the front minor half-
shaft from the speed reducer assembly with the special service
tool.
3. Tear down the front drive axle shaft sleeve
Screw off the four bolts connecting the front drive axle shaft
sleeve.
4. Tear down the oil seal ó front half-shaft;
Tear down the oil seal ófront half shaft with the special service
tool.
5. Check the swing difference of the axle driven bevel gear;
Run the flange to measure the axle driven bevel gear with the
dial-indicating lamp.
Swing difference)0.07mm
Max swing difference: 0.07 mm
In case the swing difference is more than 0.07 mm, change the
compete package of driven bevel gear.
Suspension System Automobile Axle (SF/4WD)Front Speed Reducer (Disassembly and Assembly of Front Speed Reducer)
Page 179 of 484
SA-68
10. Tear down the inner race of bearing 31306 with SST;
If the bearing is damaged, change with a new bearing.
11. Tear down the cap-differential bearing.
12. Take out the differential.
13. Take down the outer race of bearing 50KB801 and mark
clearly the left and right parts to avoid of confusion during
reassembling. 9. Tear down the driving bevel gear oil seal and the oil-
guard tray:
(a) Tear down the oil seal from the driving bevel gear with
SST.
(b) Take out the oil-guard tray.
right
left
left
Suspension System Automobile Axle (SF/4WD) Front Speed Reducer (Disassembly and Assembly of Front Speed Reducer)
14. Tear down the adjusting gaskets and clearly mark the left
and right to avoid of confusion during re-assembling.
right