Page 509 - Foton Workshop Manual - Auman EST-M

Diagnosis - Mechanical fault diagnosis
Failure phenomenon list
Failure phenomenon
Braking shoe leaf in poor contact with
braking drum/braking shoe leaf
eccentric wear
Braking shoe block not matching
Braking part worn
Two sides of coaxial brake worn not drum (poor)
even
Braking shoe leaf edge worn
Braking dragging
DI - 455
IN
Possible reason Failure elimination
1. Brake drum (horn shaped) Replace the braking drum
DI
2. Brake backing plate (crooked
Replace the braking plate
and deformed)
3. Brake shoe (crooked and EG
Replace the braking shoe
deformed)
Replace the adjusting spline nut and check the
4. Wheel bearing (loose) TR
end clearance
5. Camshaft (abrasive or damaged) Replace the camshaft
1. Brake shoe (with friction or type Replace the braking shoe leaf with the correct AX
mismatch) code
2. Brake shoe (crooked and
Replace the braking shoe
deformed) FR
1. The cam and roller (with spots) Replace the cam and roller
2. Locating pin (abrasion) Replace the positioning pin
ST
3. Camshaft or camshaft bush
Replace the camshaft or camshaft bushing
(abrasive)
1. Brake shoe (friction type Replace the braking shoe leaf with the correct BR
mismatched) code
2. Camshaft (with phenomenon
Clean and lubricate the camshaft BW
of winding and grip)
3. The surface condition of brake
Replace the braking drum
EL
Adjust the spindle nut and check the end
4. Wheel bearing (loose)
clearance
5. Go down a slope with slight Use the buffering method to brake when driving
resistance to reduce speed down a slope
6. Braking clearance on both sides Adjust the two side braking clearance to the
(the adjustment is not uniform) same
1. The width of brake shoe
Replace the braking shoe
(incorrect)
2. Brake drum (mismatched) Replace the braking drum
Replace the bearing socket and shaft end nut,
3. Bearing (loosened)
and check the end clearance
1. The push rod of brake chamber
stretches out (too long or bent to Adjust or replace
be stuck)
2. The return spring of brake shoe
change
(broken off or too soft)
3. The clearance between brake
By adjusting the brake to adjust the clearance
friction lining and brake drum (too
between brake shoes.
small)
Dismount the braking shoe and grinding the
4. The brake shoe pin (rust) shoe pin shaft, copper sleeve as well as adding
some lithium base grease
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