1.Rotate the driven bevel gear, check the runout of
driven bevel gear.
Max. Runout: 0.07mm
Assembly of front reducer assembly
1.Install the adjusting washer in the drive bevel gear,
install the big bearing inner race of drive bevel gear
by press.
2. Clean the front reducer housing, install the outer
race of big and small bearing on the reducer housing
by press..
3. Install the drive bevel gear into the front reducer
housing, then install the washer, spacer and small
bearing inner race.
4.Use the special tools to install the drive bevel gear
oil seal.
Caution: It should coat the lip with the oil seal
lithium base grease before install it and the rear
surface of rear oil seal should flush with the top of
front reducer housing after knocked in.
5. Install the drive gear flange and dustproof cover
assembly.
(Refer to “Replacement of Drive Bevel Gear Oil Seal”)
6.Use the special tools to tighten the drive gear nut
to the specified torque; the nut should be precoated
with the lithium base grease.
specified torque : 140-200N
m
7. Use the torque measuring meter to measure the
pre-applied load of big and small bearing of drive
bevel gear.
Range of pre-applied load: 1.2-1.7N
m
special tools
13. Place an adjusting shim in the position of front
reducer housing side bearing and close to exterior.
14. Install the other adjusting shim and the bearing
outer race of another side with the differential
assembly into the front reducer housing.
Remarks: Ensure the selected adjusting shim has
not gap with front reducer housing.
15. Rotate the driven bevel gear to make the differ-
ential assembly closed to the front reducer housing.
16. Use the dial indicator to measure the tooth side
gap between the drive and driven bevel gear.
The rational range of gap is: 0.15-0.25mm.
If the measured gap is beyond the range, then adjust it by
adding or reducing the thickness of shim. ( When add in
one side, the other side should be reduced with same
thickness)
Caution: Ensure the selected adjusting shim is
without clearance form front reducer housing.
17. Adjust the pre-applled axial load of side bearing.
a. Remove two adjusting shim, remeasure the thickness of two
adjusting shims.
b. Install the new adjusting shim with thickness 0.06-0.09mm
more than that of removed adjusting shim, then install it with
the differential in the reducer housing.
c. Remeasure the tooth side clearance between the drive bevel
gear and driven bevel gear.
Rational range of clearance: 0.15-0.25mm
Remarks: If the measured gap is beyond the range, then adjust
it by adding or reducing the thickness of shim. ( When add in
one side, the other side should be reduced with same
thickness)
Caution: Ensure the selected adjusting shim has not the
clearance with the front reducer housing.
18. Install the bearing gland of both sides and use
the wrench to tighten it to the specified torque.
specified torque : 90-115Nm
Remarks: Distinguish the left and right during assembly.
19. Use the torque measuring meter to measure the
total pre-applied load of front reducer.
specified torque : 1.8-2.4Nm
sound contactlarge end contact
toe contact
select the adjusting washer which can make the drive gear close to the
driven bevel gear
select the adjusting washer which can make the drive
gear away form the driven bevel gear rsmall end contact
dedendum contact
20. Check the meshing mark of drive and driven
bevel gear.
a. Paint 3-4 teeth with the red lead in three different positions
of driven bevel gear.
b. Hold the flange of drive gear; rotate the driven bevel gear in
clockwise and anticlockwise.
c. Check the contacting condition of gear tooth.If the meshing
mark of drive and driven bevel gear does not consist with
thatshown in figure, it should select the proper adjusting
washer for modification according to the detailed form of
meshing mark.
convex of drivenconcave of driven bevel
d. Remove the drive bevel gear and use the special toolsto remove
the large bearing of drive bevel gear beforereplacethe adjusting
washer.
e. Insert the new adjusting washer and usethespecial tools to
press in the large bearing of drivebevel gear.
f. Place the adjusting washer above the large bearing on the
drive bevel gear, install the spacer in the reducer housing;
install the drive gear flange andtighten the nut to the specified
torque.
g. Remeasure the pre-applied load of drive gear bearing clearance
and the total pre-applied load of reducer; ensure it meets the
requirement.
21. Use the dial indicator to measure the axial and
radial run-out tolerance of . Drive bevel gear flange.
Max. Axial runout : 0.1mm
Max. Radial run-out tolerance: 0.1mm
Remarks: It should check the big and small bearing of drive
bevel gear when the runout is more than 0.1mm.
22. Rivet the nut of drive bevel gear.
23. Use the bolt coated with screw lock agent toconnect
the clump weight bracket welded assembly to the front
reducer housing and tighten it to the specified torque.
Specified torque : 20-26Nm
24.Use the bolt coated with screw lock agent to
connect the clump weight assembly to the clump
weight bracket assembly and tighten it to the speci-
fied torque.
Specified torque : 20-26Nm
The amount of screw lock agent could cover the screw.
25.Use the pneumaticto screw two studs on the correspon
ding screw hole on the front axle housing until the
limitation.
26. Coat the plane of front axle housing with the
continuous 1596 silicon rubber plane sealant, scrape
it to level by plate.
Caution: Avoid the screw hole when paint the sealant; prevent
the sealant enters into the screw hole.
27. Install the front reducer assembly on the front
drive axle housing and screw on the hexagon bolt and
spring washer combination; cap the spring washer on
the stud, tighten the nut to the specified torque.
(The screw of all bolts should be precoated with screw lock agent)
The specified tightening force of hexagon bolt and spring washer
combination, stud and nut should be: 18-25N
m
Caution: The bolt should be tightened in diagonal sequence
evenly; check the reducer housing and axle housing contacting
surface for gap; check the sealant from break. It should
remove the reducer for reinstallation if has the gap or break.
28. Screw the oil filling plug with washer on the front
drive axle.
Caution: Do not tighten it.
29. Screw the oil drain plug on the front drive axle.
Specified torque : 30-35Nm
30. Use the special tools to install the major semiaxle
oil seal in the front axle tube.
Caution: Precoat the lip of oil seal with thin lithium base grease
and the oil seal should be installed in position.
(It should coat the screw of the stud which is screwed
in the front axle housing with the screw lock agent, and
the amount should be just can cover the screw which is
screw in the front axle housing)
Caution: The position of stud should consist with that before
disassembly.
electric clutch detector
37. Detect the electric clutch assembly .
a. Measure the clearance between the shift fork and shift fork
sleeve.
Range of clearance : 0.2-0.4mm
It should replace the electric clutch assembly and shift fork
sleeve when the clearance is not in the range.
b. Connect the electric clutch assembly to the electric clutch
detector and power the electric clutch detector with220V
power supply to test the electric clutch (Before the test,
adjustthe test controller status to make the motor starting time
is 3s ,the time form found the actuator is not in position to
restartingis 2.5s and the time of controller to redrive the
electric clutch is2s) The motor starts for 3s when the gear
switch is shifted form 2WD to 4WD, the lamp flashes at the
same time, the clutch is in 4WD status, the indicator lamp is
light always. If does not reach the 4WD status in the first
time, then the controller restarts it for 2s after 2.5s delay, the
lamp flashes at the same time; if it is still not in position, then
the indicator lamp flashes twice continuously, the indicator
lamp is extinguished for 1s, the motor is stopped. That means
the electric clutch is unqualified and should be replaced by the
qualified product. The motor starts for 3s normally when the
clutch is shifted form 4WD to 2WD, the lamp flashes at the
same time, when the clutch is in 2WD status, the indicator
lamp is extinguished always. If does not reach the 2WD status
in the first time, then the controller restarts it for 2s after 2.5s
delay, the lamp flashes at the same time; if it is still not in
2WD status, then the indicator lamp flashes twice
continuously, the indicator lamp is extinguished for 1s, the
motor is stopped.
That means the electric clutch is unqualified and should be
replaced by the qualified product.
38. Cover the shift fork sleeve on the major
semiaxle spline.
39. Install the separator housing on the front axle
tube flange and use the bolt to tighten it to the
specified torque
(The bolt should be precoated
with the screw lock agent and the amount should be
just can cover the complete screw)
specified torque : 90-110Nm
Caution: Before installation, remove the foreign material on
two matching surfaces of separator housing and front axle
tube flange; and precoat the 1596 silicon rubber plane sealant
on the front axle tube flange. Caution: Prevent the sealant
from entering into the screw hole.
40. Press in the plastic vent tube on the electric
clutch housing and front axle tube.
41. Install two location pins in the location pin hole
of electric clutch housing respectively.
42. Coat the connecting surface of electric clutch
housing and electric clutch with 1596 silicon rubber
sealant uniformly; level it by plate.
Caution: The connecting surface should be cleaned
and must not have the oil and other foreign
matters. The sealant must not enter into the elec-
tric clutch housing and screw hole.
44.Insert the clip into the vent tube bracket.
45. Clamp the vent tube clip on the front drive axle
vent tube connecting tube assembly.
46. Connect the front drive axle vent tube connecting
tube assembly to three ports, the front axle tube,
electric clutch and electric clutch housing. 43. Install the electric clutch assembly on the electric
clutch housing.
a. Make the shift fork cross on the shift fork sleeve.
b. Align the location pin hole of electric clutch with two
location pins, and tighten it by bolt; tighten the bolt to the
specified torque. (Precoat the medium screw of bolt with one
or two drop of screw lock agent)
Specified torque : 23-26N
m
47. Screw off the oil filling plug of front drive axle
housing, then fill the axle housing with the hypoid
gear oil; then tighten the oil filling plug to the speci-
fied torque.
Gear oil number: GL-5
Filling amount: The oil level is flush with the lower edge of oil filling
port.
specified torque : 140-150N
m
48. Fill the electric clutch housing with the gear oil ;
then tighten the oil filling plug to the specified
torque.
Gear oil number: GL-5
Filling amount: The oil level is flush with the lower edge of oil filling
port.
Specified torque: 140-150N
m
Installation of front reducer assembly
1. Install the front drive shaft assembly on the reducer assembly (Refer to “Assembly of Front
Drive Shaft”)
assembly mark
2. Use the jack to support the front drive axle, insert the
hanger plank bolt with washer and tighten it to the speci-
fied torque.
Remarks: Do not insert the previous two bolts in reverse direction.
Specified torque : 200-220N
m
3. Use the bolt to connect the front drive axle flange to
the drive shaft according to the mark made before
disassembly, and tightens it to the specified torque.
Specified torque : 73-83Nm
4. Install the beam under the front drive axle; tighten
the connecting bolt of the beam to the specified torque.
Specified torque : 73-83Nm
5. Connect the power sire connector of the electric
clutch to the power output wire of the car.