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6. Braking system common trouble and its elimination
Fault symptom
Possible cause
Eliminating method
Unsmooth of the wheel
1. There has compressed air inside
the braking chamber
2. Improper lubrication of the
camshaft or improper return of
the adjusting arm
3. Brake shoe or chamber return
spring fatigued or broken
4. The spring braking takes effect
5. Clogging of the exhaust port in
the quick release valve
6. Brake valve primary or
secondary piston return failure
1. Check and adjust the exhaust valve of
the quick releasing valve
2. Adjust the faulted parts
3. Replace the faulted parts
4. Eliminate causes of the spring braking
unreleased
5. Disassemble and clean the faulted
parts
6. Disassemble and clean the braking
valve and replace the faulted parts as
needed
There has abnormal
sound when troddening
the brake pedal
1. The clincher or the bolt is
projected because of abrasion of
the braking friction lining
2. Surface hardening of the friction
lining
3. Deterioration of the friction
lining
4. Improperly contact between the
brake shoe and the friction
lining
5. Uneven abrasion of the brake
drum internal surface or weak
installation
6. Looseness of the brake shoe
supporting
7. Abrasion of the hub bearing
8. Deformation of the brake drum
1. Replace the friction lining
2. Replace the friction lining
3. Replace the friction lining
4. Rivet the rivet or tighten bolt
5. Adjust or tighten the brake drum
6. Adjust the clearance between the
brake shoes and tighten the supporting
pin lock nut
7. Replace the hub bearing
8. Adjust or replace the brake drum
