Page 510 - Foton Workshop Manual - Auman EST-M

DI - 456 Diagnosis - Mechanical fault diagnosis

Failure phenomenon Possible reason Failure elimination
1. The brake shoe plate (without free Check the gas circuit or adjust the pull
travel) rod of main brake valve
2. Brake camshaft (burnt, stuck, with big
Replace the braking cam
return resistance)
3. Brake return spring (too soft or
Replace the braking reset spring
Braking bite broken off)
4. Brake shoe and brake drum (with
Adjust the clearance
small clearance)
Polish the pin shaft of brake shoe,
5. Brake shoe (rust) copper bush, and add a little of lithium
base grease
1. Brake shoe (crooked and deformed) Replace the braking shoe
2. Brake shoe (with severe abrasion, and
the copper rivet head out of the surface Replace the braking shoe
of brake shoe.)
3. Brake friction lining (the friction Scrub the surface oil stain of brake
material is not good or the surface is too shoe with alcohol and polished with
Brake noise
hard after friction and burning loss.) coarse sand paper.
Replace the rivet and pay attentions to
4. Brake shoe rivet (loosened)
the quality
5. The inner surface abrasion of brake
drum (uneven and the cylindrical degree Cut the brake drum on the special lathe
is too large.)
1. Tire (uneven pressure or size Restart or replace the tyre according to
mismatched) the requirements
Tighten the locknut of braking shoe
2. Brake shoe (improperly installed) or
supporting pin and replace the reset
return spring (damaged)
spring
3. Brake friction lining (with improper Adjust the jointing surface of friction
joint) lining
4. Left and right brake devices
Adjust the brake
Braking not stable (improperly adjusted)
5. Brake lining (deteriorated) Replace the friction disc
Check the brake chamber diaphragm.
6. Brake chamber (failure)
Replace the broken parts
Clean it with gasoline and replace the
7. Brake lining (with oil)
hub oil seal
8. Brake backing plate (damaged) Replace the braking plate
9. The u-bolts of steel plate spring
Tighten the U-bolts
(loosened)
Grind off the scorched layer of brake
shoe with the sandpaper, change the
1. Friction lining (with severe abrasion
mounting angle of the swing arm or
or ablation)
adjust the connecting bolt of swing arm
Braking is not working or not adequate and pull rod.
Clean the oil stain on the surfaces of the
2. The internal surface of the friction friction lining and the brake drum with
lining or brake drum (with oil stain) gasoline and remove the oil marks that
are immersed in friction lining.

DI-456