Page 192 of 484

SA-81
4. Check the grooved ball bearing
Check the grooved bearing to see whether there is damage or
wear.
5. Change the bearing where necessary:
(a) Press out the grooved ball bearing with SST.
(b) Press in the new grooved ball bearing with SST.
6. Mount the new oil seal of rear wheel bearing.
Press in the new oil seal of rear wheel bearing with SST
Coat moderate lithium base grease on the lip open of oil seal.
7. Check the bearing seat.
Check the wear or damage situation.
8. Change the bearing seat where necessary:
(a) Tear down the oil seal of rear wheel bearing and the
grooved ball bearing with SST.
(b) Tap the bolts with copper bar to tear down the bearing seat.
(c) Mount the new grooved ball bearing and the oil seal of
rear wheel bearing on the bearing seat
(d) Press the rear brake, which is put on with bolts, in the
bearing seat.
9. Check the wear or damage of the inner oil seal of the rear
wheel bearing.
10. Change the rear wheel bearing where necessary:
(a) Tear down the oil seal of rear wheel bearing with SST. Suspension System and Automobile Axle (rear)Rear half Axle Shaft
Page 211 of 484
SA-100Suspension System and Vehicle AxleRear Suspension (Leaf Spring Type)
Remark: Tightening U-shaped bolt to the degree that the
protruding lengths of all U-shaped bolts under the spring seat
are the same.
3. Mount the rear vibration damper
(a) Connect the vibration damper to the vehicle frame with
bolts and then tighten the bolts.
Tightening moment: (25)Nm
(b) Connect the vibration damper to the sprint seat with bolts
and tighten these bolts.
Tightening moment: (25)Nm
4. Keep the suspension frame in stable status;
(a) Mount on the wheel;
(b) Remove the bracket, and make the vehicle bounce verti-
cally for several times so as conduce it in stable status.
5. Tighten the front ear pin and rear ear pin;
Tighten the nuts of front ear pin;
Tightening moment: (900)Nm
Tighten the nuts of rear ear pin;
Tightening moment: (900)Nm
all lengths of bolts protruding are same
Page 214 of 484

BR-3
Troubleshooting (continued)
Braking SystemNotice and Troubleshooting
Trouble Causes Inspection items
There is clatter noise when using
the brake(Drum-type brake)
The brake shoe is seized on the flange of rear baffle;
The flange of rear baffle is worn;
The pressure spring of brake shoe is loose or missing;
The fixed bolts of brake bottom plate is loose;
(disc type brake)
The brake pad support plate is loose or missing
The mounting bolts are loose;Add lubricant
Change the lubricating flange
Change
Tightening it
Change
Tightening it
There is hoarse noise or quack-
quack when using the brakeThe brake shoe or brake pad is worn;
The brake caliper, the wheel or the rotator interferes each
other.
There is friction between the dust cover and brake disc,
the brake bottom plate and the brake drum;
The other braking part has trouble
There is friction between the tire and bodyChange the part, and re-process
precisely the brake drum or
rotator if the abrasion is serious;
Make change according to real
situation;
repair or change
Make repairing according to
real situation;
Change
Check or maintain the part
There is such noise as
continuous screaming, quack-
quack, oscillating sound, etc.
Notice: the braking materials
may generate the natural noise
and heat during friction, and
thus emit the energy. Therefore,
it is normal to have the
screaming noise. These
phenomena will be more serious
under the condition of frigidity,
torridity, and over humidity,
snowing and mud. the
screaming noise occurring
occasionally will not lead the
fatal brake trouble nor reduce
the effective properties of the
brake.The brake drum, brake liner, liner or brake pad is worn
or scraped
The brake liner or brake pad is dirty or with oil stain or
polished.
The brake liner or brake pad is improperly used.
The brake pedal or vacuum booster drag rod is unsuitably
adjusted.
(disc type brake)
The brake pad silent pad is loss or damaged;
The brake pad is worn to the degree that the abrasion-
indicating lamp of brake pad has friction with the rotator.
There is burr or rust on the brake caliper.
(Drum type brake)
The pressure spring of brake shoe is soft in rigidity, or is
damaged or unsuitable.
The pressure spring pin or spring of brake shoe is loose
or damaged;
There is crack on the brake bottom plate flangeCheck, repair or change
Clean or change
Check or change
Check for adjustment
Change
Change
Clean or polish the burr
Check, repair or change
Check, repair or change
Check, repair or change
Page 225 of 484

BR-14
Brake pad change
Remark: Check the thickness of the friction material of brake
pad through the observation hole on caliper body after the
vehicle covers thirty thousand; if the thickness fails to fall
within the specified range, change is required. (If the brake is
used often, the thickness of friction materials of brake
pad is required to check whether it is within the specified
range after the vehicle covers more than ten thousand,
if not, change it.
1. Tear down the front wheel;
2. Check the thickness of friction material of brake pad:
Check the thickness of friction material of brake pad through
the observation hole on caliper body, if it fails to be within the
specified range, change it.
Min thickness: 2.0mm
3. Raise the wheel-brake cylinder:
(a) Tear down the short bolts of sliding sleeve;
(b) Uplift the wheel brake pump and hang it with rope to
protect the brake oil pipe.
Remark: Do not loosen the brake oil pipe and the bleeding plug.
4. Tear down the following parts:
(a) Two braking pads;
(b) Two silent pad clusters;
(c) Four braking pad lock plates.
Braking SystemFront Brake (Dr)
Page 226 of 484
BR-15
5. Brake disc measurement
(See page BR-17)
6. Measure the radial run-out of the brake disc;
(See BR-18)
7. Mount the lock plate of brake pad.
8. Mount the new brake pad.
(a) Mount the silent pad cluster on brake pads of both the
inner and outer sides;
Remark: Pollution of oil stain or coat is not allowed on the
work faces of brake pad or brake disc.
(b) Draw out a little brake liquid from the liquid container to
prevent the brake liquid overflowing from the liquid
container;
(c) Press in the piston with the hammer lever or similar tool.
9. Mount the wheel-brake cylinder;
Mount and screw up the hex bolts (the hex bolts shall be coated
with the thread locking sealing agents.
Fastening torque(38-50)Nm
Remark: only one brake pad can be changed in one time so as
to prevent the piston of other wheel being shot out.
Braking SystemFront Brake (Dr)
Page 227 of 484
BR-16
10. Mount the front wheel;
Screw up the fixing nut of wheel.
Fastening torque(135150)Nm
Disassembly of Wheel-brake Cylinder
1. Take apart the brake pipeline.
(a) Tear down the brake pipeline. And block the outlet with
a clean cork.
(b) Tear down the brake oil pipe bracket from the wheel-
brake cylinder.
2. Tear down the wheel-brake cylinder from the caliper
bracket.
Tear down the two hex bolts and the wheel-brake cylinder.
3. Tear down the brake pad:
(a) Two brake pad;
(b) Two silent pad cluster;
(c) Four brake pad lock plate.
Pump Disassembly of Wheel brake
1. Take apart the following parts:
(a) Two sliding sleeve;
(b) Four sliding sleeve dust cover;
(c) Two sliding liner.
Braking SystemFront Brake (Dr)
Page 229 of 484

BR-18
3. Measure the bouncing value of the brake disc face;
Remark: verify the bearing is aligned correctly before
measuring.
The bouncing value of max face: 0.11mm
4. Change the brake disc according to the requirements
(a) Tear down the calipers body from the steering knuckle.
(b) Tear down the hub and the brake disc (See Page SA-11).
(c) Mount the new brake disc and screw up the connecting
bolts according to the specified torque.
Fastening torque(6079)N.m
(d) Mount the hub and brake disc assembly (see page SA-12);
(e) Mount the caliper bracket on the steering knuckle and
screw up the bolts according to the specified torque.
Fastening torque(85105)N.m
Cylinder Assembly of Wheel-brake
1. Preparation
All parts shall be washed, dried and cleared away the alien
materials before the assembly. And coat moderate vacuum
silicon base grease on the work faces of sliding sleeve dust
cover, sliding sleeve and the sliding liner; and plaster the
moderate rubber lubricant on the work faces of piston, piston
dust cover and the rectangular sealing ring.
2. Encase the piston sealing ring and piston in the caliper body;
(a) Screw the vent screw in the vent hole of calipers.
Fastening torque(813)N.m
(b) Coat moderate rubber lubricant on the work face rectan-
gular sealing ring and encase the caliper body in groove.
(c) Encase the piston in the caliper body.
3. Encase the piston dust cover and the dust cover
snapping ring in the wheel-brake cylinder.
Braking SystemFront Brake (Dr)
Page 230 of 484

BR-19
4. Mount the sliding liner, sliding sleeve dust cover and
sliding sleeve.
(a) Encase the sliding liner and sliding sleeve dust cover in
the wheel-brake cylinder.
(b) Ensure the sliding sleeve dust cover in the ring groove of
wheel-brake cylinder hard.
(c) Encase the sliding sleeve in the sliding sleeve dust cover.
(d) Ensure the sliding sleeve dust cover in the ring groove of
sliding sleeve.
Mount of Brake Calipers
1. Mount the brake pad;
2. Mount the wheel-brake cylinder:
(a) Mount the wheel-brake cylinder;
(b) Mount and tighten the two assembling bolts (the bolts
shall be coated with the thread locking sealing agent).
Fastening torque(3850)N.m
3. Connect the brake pipeline.
Connect the brake pipeline with the calipers.
Fastening torque(212)N.m
4. Observe the height of brake liquid level and, if
necessary, add in the brake liquid and exhaust the air
in braking system.
Notice: prevent the brake liquid from spraying on the
brake disc when exhausting air.
5. Check to see whether there is leakage of brake liquid. Braking SystemFront Brake (Dr)