SA-2
Troubleshooting
Suspension System and Automobile AxleTroubleshooting
Change the tire or inflate to the proper pressure
Balance the wheels
Change vibration damper
Check Alignment of Front Wheel
Change or adjust the wheel bearing
Check ball joint) or liner
Tighten or change steering linkage
Adjust or repair the steering device
Discharge the oil and change with new one
Check the wandering clearance
Check the gears
Change the bearing
Change the bearing
Tighten or change the bearing Trouble Causes
Inspection items
Body wandering/body
draggingTire wear or improper air inflation
Incorrect alignment of front wheel
Over-tightened wheel bearing
Part looseness or damage of front/rear sus-
pension
Wear or looseness of steering rod system
Poor connection or damage of steering de-
viceInflate the tire to the proper pressure or change
the tire.
Check the situation of alignment of front wheel
Adjust the wheel bearing
Tighten or change the suspension element
Tighten or change the steering rod system
Adjust or repair the steering device
Body sink Overloaded vehicle
Wear of vibration damper
Poor spring performanceCheck the loading mass
Change vibration damper
Change spring
Left-right vibration/up-
down bouncingImproper air inflation
Bending or damaged lateral stabilizer
Vibration damper wearInflate the tire to suitable pressure
Change stabilizer
Change vibration damper
Front wheel vibration Tire wear or improper air inflation
Imbalance of wheels
Vibration damper wear)
Improper Alignment of Front Wheel
Wheel bearing wear or improper adjustment
Ball joint or liner wear
Steering linkage looseness or wear
Poor adjustment or damage of steering mecha-
nism
Abnormal tire wear Improper air inflation
Vibration damper wear
Poor Alignment of Front Wheel
Suspension system wearInflate the tire to the proper pressure
Change vibration damper
Check the Alignment of Front Wheel
Change suspension element
Speed reducer leakage Over-high oil level or improper oil quality
Oil seal wear or damage
Flange looseness or damageDischarge the oil for change
Change oil seal
Tighten or change the flange
Noise inside the
axleNoise inside the axleOver-low oil level or inferior oil quality
Over-large wandering clearance between
driving bevel gear and driven bevel gear
Wear and disintegration of driving bevel
gear and driven bevel gear
Bearing wear of driving bevel gear
Bearing wear of rear axle shaft
Bearing looseness or wear of speed reducer
SA-4Suspension System and Automobile AxleAlignment of Front Wheel (Dr SL SK SY SJ)
5. Adjustment for inner tilt angle of kingpin, outer tilt angle
of front wheel and back tilt angle of kingpin
Item
Inner tilt
angle of
kingpin
Outer tilt
angle of
front
wheelApplicable vehicle type
Dr SL SK SY
SJ
Mechanic
steeringDr SL SK SY
Power
steeringDr
SL SK SY
SJ
Back tilt
angle of
kingpinMechanic
steeringDr SL SK SY
Power steer-
ingDr SL SK SY
SJ93045
1452
03020
01010
02010
03015
24515
315Location parameter
4. Adjust the wheel angle
Take apart the limit bolts of the steering knuckle to check the
steering angle A of inner wheel.
Inner wheel steering angle
Dr SL SK SY ( 3640)
SJ ( 3234)
Remark: The wheel should not contact the body or brake hose
when the steering wheel reaches the limit position.
In case the steering angle of inner wheel doesnít conform to the
standard value, adjust the wheel angle through adjusting the
limit bolts of the steering knuckle.
Fastening torque(900)Nm(SJ)
If the wheel angle fails to be adjusted within the standard value,
change the weary or damaged parts of steering system.
If the tilt angle fails to fall within the specified values, make an
adjustment through adding or reducing the gaskets on the
location of upper arm.
Gasket thickness: 3.0, 2.0 and 1.0mm
Once the gasket thickness increases by 1mm, the outer tilt
angle of wheel will change by 7', while the back tilt angle of
kingpin will change 20'.
After the wheel outer tilt angle and the back tilt angle of kingpin
are adjusted, if the inner tilt angle of kingpin still fails to the
specified value, check the steering knuckle or front wheel to
see whether they are bending or loose.
150-20
adjusting bolt
outer tilt
angle of
front wheel inner tilt angle of kingpin
back tilt angle of
kingpin
front AB AB
HPM
SA-7Suspension System and Automobile AxleAlignment of Front WheelAlignment of Front Wheel (SF)
In case the outer tilt angle of front wheel or the back tilt angle
of kingpin fails to conform to the specified value, adjust the
cam forward or backward may amend them.
5. Wheel angel adjustment
Take apart the limit bolt cap of the steering knuckle to check
the inner wheel steering angle A.
The inner wheel steering angle: =32
Notice:The wheel should not touch the body brake hose
when the steering wheel is rotated to the bottom.
In case the max steering angle is not in the conformity with the
standard value, adjust the wheel angle through the limit bolts
of steering knuckle.
In case the wheel angle still fails to fall within the standard
range, make a inspection and change the weary and damaged
steering mechanism parts.
6. Wheel toe-in adjustment
Adjust the wheel toe-in according to the following approach
(a) Raise or reduce the vehicle until the suspension stands in
balance.
(b) Push the vehicle on the ground 5 meters forward under
the condition that the front wheels locate forward in a
line.front cam adjustment
rear cam adjustment
reduce increaseincrease reduce
A
B
A B
front
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)Nm
(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-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)Nm
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-30
5. Front hub bearing outer race inspection and change
(a) Check each bearing
Wash the inner and outer races of each bearing, and check
them whether they are wearied or damaged.
(b) Tear down the outer race of each bearing.
Tap out the bearing outer race with copper bar and
hammer.
Notice: bind the dismantled inner and outer races of
bearing together to prevent from mixing.
6. Front brake disc inspection and change
(a) Check the wear situation of front brake disc.
(b) Tear down the bolts that connect the front wheel hub and
front brake disc.
(c) Connect the front wheel hub and front brake disc and
screw up the bolts with moment spanner to the specified
torque diagonally
Fastening torque(70-80)Nm
(d) Conduct the dynamic balance test on the dynamic balancer,
the amplitude value displayed should not be above 13.5g
under the condition that the measuring rotating velocity
is 796 r/m and the locking rotating velocity 786 r/m,
otherwise, tap in the counter balanced clip, which is 4g
each, at the corresponding location, the number of the
clip should not be more than 4.
(e) Tap in the new bearing outer race with the special service
tool.
Notice: the inner and outer races of bearing should be
changed in set.
Assembly of Front Wheel Hub
1.Mount on the inner race and roller assembly of front hub
bearing (inner) as well as the front hub oil seal.
Coat the lithium base grease of 4 to 5 mm on the inside surface of
the bearing outer race and front wheel hub, and plaster the
lubricant in the front hub bearing (inner) and the roller assembly.
Coat a little lubricant on the lips of oil seal of front wheel hub, and
then tap the oil seal of front hub in place with special service tool.
Notice: do not coat the lubricant on the front brake disc face.
Suspension System and Automobile Axle (SF/2WD)Front Wheel Hub and Steering Knuckle (Front Wheel Hub)
SA-34
7. Tear down the lower ball stud assembly from the steering
knuckle.
Inspection on and Change of Steering
Knuckle
1. Check the steering knuckle.
Check the steering knuckle with the dye penetration agent to
see whether there is crack or not.
If crack is found, the steering knuckle is required to be changed.
Mount of Steering Knuckle
1. Mount the lower ball stud on the steering knuckle.
Connect the lower ball stud and steering knuckle with bolts,
which are tightened according to the specified torque.
Fastening torque(70-90)Nm
2. Mount on the steering knuckle
(a) Press down the lower arm to mount on the steering
knuckle.
(b) Mount on the lower ball stud, groove nut and screw up the
nuts according to the specified torque and then mount on
the split pin.
Fastening torque(132-152)Nm
Suspension System and Automobile Axle (SF/2WD)Front Wheel Hub and Steering Knuckle (Steering Knuckle)
SA-46
5. Tear down the front hub, the oil seal and the inner race
of front hub bearing (inner)
(a) Prize out the oil seal.
(b) Take out the inner race of front hub bearing (inner).
6. Inspection on and change of the outer race of front hub
bearing
(a) Check each bearing:
Wash the inner and outer races of each bearing to check
their wear or damage situation.
(b) Tear down the outer race of each bearing:
Tap out the outer bearing race with copper bar and hammer.
Notice: bind the inner and outer races of the same
bearing together to prevent from mixing.
7. Inspection and change for front brake disc
(a) Check the wear situation of the front brake disc.
(b) 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
bolts, which are tightened diagonally with moment span-
ner according to the specified torque.
Fastening torque(70-80)Nm
(d) Make the dynamic balance test on the dynamic balancer,
and the amplitude value displayed should not be smaller
than 13.5g under the condition that the measuring rotat-
ing velocity is 796 r/m and the locking rotating velocity
of 786 r/m, otherwise, tap the counter balanced clip,
which is 4g each, in the corresponding position, the clip
number should not be more than 4.
(e) Tap in the new bearing outer race carefully with the
special service tool.
Notice: the inner and outer races of the same bearing
should be changed in one time.
Suspension System and Automobile Axle (SF/4WD)Front Wheel Hub and Steering Knuckle (Front Wheel Hub)