Engine JAC HFC4DA1-2C. Manual — part 154
RAX
RAX
RAX
RAX Rear
Rear
Rear
Rear Axle
Axle
Axle
Axle
-139-
Adjustment of meshing marks:
Contact status of driven gear
working flank
Causes
Adjusting
method
A-Tooth
surface
contact
area
adjustment
B-Backlash adjustment
Deflected
to addendum
High driving gear, driven gear too
far
1. Driven gear away from driving gear
2. Driving gear close to driven gear to
obtain
correct
backlash
(adding
washers)
Deflected to dedendum
High driving gear, driven gear too
close
1. Driven gear close to driving gear
2. Driving gear away from driven gear
to obtain correct backlash (reducing
washers)
Deflected to small end
High driven gear, driving gear too
close
1. Driven gear away from driving gear
2. Driving gear away from driven gear
to obtain correct backlash (reducing
washers)
Deflected to big end
High driven gear, driving gear too
far
1. Driven gear close to driving gear
2. Driving gear close to driven gear to
obtain
correct
backlash
(adding
washers)
RAX
RAX
RAX
RAX Rear
Rear
Rear
Rear Axle
Axle
Axle
Axle
-140-
Diagnosis
Diagnosis
Diagnosis
Diagnosis and
and
and
and Testing
Testing
Testing
Testing
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
Fault
Causes
Solutions/Preventive Measures
Hub bearing sluggish
Excessive preload for hub bearing
Adjust the preload.
Bearing lack of lubricant or adoption of improper
grease
Add or change grease.
Bearing contaminated by dust
Clean and add grease.
Hub bearing sluggish
Poor camshaft lubrication or adjusting arm failed to
return
Add grease or correct faulty parts.
Wheel sticking
Return spring fracture or fatigue for brake shoe or
air chamber
Replace faulty parts.
Abnormal
driving
sound
Improper differential gear clearance
Replace washer or gear.
Excessive clearance between driving and driven
gears
Replace washer or gear.
Too small driving gear bearing preload
Adjust preload.
Abrasion or damage of differential gear, planetary
gear, spider thrust washers and etc.
Correct or replace faulty parts.
Too low oil level
Add lube oil.
Lube oil leak
Wear, looseness or damage of oil seal
Replace oil seal.
Looseness of final drive fastening bolt or damage of
sealant
Tighten bolt or reapply sealant.
Looseness of bearing support fastening bolt
Tighten bolt to the specified torque.
Looseness of drain plug or damage of lining
Tighten plug or replace lining.
Axle housing deformation due to overloading
Correct or replace axle housing.
Vent plug blockage or damage
Clean or replace vent plug.
Insufficient brake force
Overheating or deterioration of brake lining
Replace brake lining.
Improper fitting of friction lining
Correct the fitting position of brake lining.
Brake drum flooded by water
Depress the pedal slightly during running to drain
water.
Grease on contact surface between brake lining or
brake drum
Clear grease or replace brake lining.
Abnormal
braking
noise
Rivet extruded due to wear of brake lining
Replace brake lining.
Hardening or deterioration of brake lining surface
Replace brake lining.
Uneven wear or insecure installation of brake drum
Correct brake drum or tighten bolt.
Untight contact between brake shoe and brake lining
Replace rivet.
Looseness of brake shoe fixed pin
Tighten the lock screw of fixed pin.
Hub bearing wear
Replace hub bearing.
Deformation of brake drum
Replace brake drum.
Improper installation of brake shoe or damage of
return spring
Tighten fixed pin lock screw or replace return
spring.
Greasy or deteriorated brake lining
Clean or replace brake lining.
Damage of brake bottom plate
Replace brake bottom plate.
RAX
RAX
RAX
RAX Rear
Rear
Rear
Rear Axle
Axle
Axle
Axle
-141-
Removal/Installation
Removal/Installation
Removal/Installation
Removal/Installation
Rear
Rear
Rear
Rear axle
axle
axle
axle
Removal of rear axle
1.
Block the wheel front and back with anchor blocks.
2.
Loosen outside wheel nut.
3.
Jack up the rear axle.
Removal of axle shaft
1.
Loosen axle shaft nut.
2.
Remove axle shaft. If it is difficult to remove,
please use copper hammer to knock on the axle
shaft flange gently until it becomes loose.
Disassembly of wheel hub
1.
Remove lock washer.
2.
Remove hub bearing lock nut.
Attention:
Remove adjusting nut by using 7757 adjusting nut
wrench for hub bearing.
3.
Remove hub assembly.
Attention:
Attention:
Attention:
Attention:
Please apply the rear hub puller.
RAX
RAX
RAX
RAX Rear
Rear
Rear
Rear Axle
Axle
Axle
Axle
-142-
Removal/Installation
Removal/Installation
Removal/Installation
Removal/Installation (Continued)
(Continued)
(Continued)
(Continued)
Rear
Rear
Rear
Rear axle
axle
axle
axle
4.
Remove axle shaft oil seal from the end of axle
shaft sleeve.
Note:
Note:
Note:
Note:
During assembly, apply lithium base grease onto
the outer ring of axle shaft oil seal and then press it
into rear hub.
5.
Disassemble together with the inner ring of inner
bearing.
Note:
Note:
Note:
Note:
During assembly, oil seal bushing shall be pressed
into axle shaft sleeve by using special pressing die
after being heated.
6.
Remove oil seal from hub assembly.
7.
Remove outer ring of inner/outer bearing.
8.
Remove brake drum.
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