116
Fault symptom
Possible cause
Eliminating method
Unsteady braking
1. Tire pressure uneven or tire
dimension different
2. Improper installation of the brake
shoe or damage of the return
spring
3. Improper engagement of the
braking friction lining
4. Improper adjustment of the left
and right brake
5. Deterioration of the braking
friction lining
6. Oil on the braking friction lining
7. Damage of the brake backing plate
8. Looseness of the leaf spring U-bolt
1. Operate as required
2. Tighten the locknut of the brake
shoe supporting pin and replace the
return spring
3. Adjust the friction lining
4. Adjust the brake
5. Replace the friction lining
6. Clean with the gasoline to
eliminate the effect of the leakage
at the hub oil seal, oil cylinder
cover and the rubber cap
7. Replace it
8. Tighten the U-bolt
The braking can't be
applied under all
conditions
When compressed air pressure is
normal:
1. Too short of the brake valve travel
2. The camshaft doesn't rotate (the
bushing is lack of lubricant)
3. Improper adjustment of the
braking chamber pusher stroke
4. Improper sliding contact of the
relay valve
5. Overheat or deterioration of the
braking friction lining
6. Improper engagement of the
braking friction lining
7. There has lubricant on the friction
lining or the brake drum
8. Water entering brake drum
1. Check ,and replace the braking
valve if necessary
2. Check working condition of the
camshaft and replace it as needed
3. Adjust the travel
4. Disassemble and repair
5. Replace the friction lining
6. Adjust engagement position of the
friction lining
7. Clean the oil trace with proper
cleanser or replace the friction
lining
8. Drying out the water by pressing
the pedal gently during the running
When compressed air pressure is
abnormal:
1. There has air leakage inside the air
pipeline
2. The air compressor doesn't work
3. The pressure regulator is improper
adjusted or failured because of the
impurity entering
4. Air leakage in the brake valve
1. Repair the leakage point
2. Disassemble and repair air
compressor
3. Adjust or wash
4. Disassemble and repair the brake
valve
