King Long XMQ6900 Series, Operating Manual

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Common trouble and elimination
6-7
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