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Wednesday, 22 October 2014

Drum Type Hydraulic Brake Trouble Diagnosis Chart

Drum Type Hydraulic Brake Trouble Diagnosis Chart Points : Drum Type Hydraulic Brake Trouble Diagnosis Chart
Drum Type Hydraulic Brake Trouble Diagnosis Chart
Complaint
Possible Cause
Check or Correction
1.Brake pedal goes to floor based.a) Brake shoes out of adjustment.
b) Brake pedal out of adjustment.
c) Brake lining worn
d) Lack of brake, fluid.
e) Air in system
f) Worn Master Cylinder.
a) Adjust
b) Adjust
c) Replace lining
d) Add fluid, bleed system
e) Add fluid, bleed system
f) Repair
2.One brake drags.a) Brake Shoes out of adjustment.
b) Clogged brake lining clear or replace line.
C) Wheel cylinder defective repair or replace.
d) Weak or broken return spring.
e)Loose wheel bearing
a) Adjust
b) Repair or Replace
c) Replace Spring
d) Adjust bearing
e) Adjust
3.All brakes draga) Incorrect brake pedal adjustment
b) Reservoir filler plug vent clogged
c) Mineral oil in system
a) Adjust
b) Clear vent
c) Replace damaged rubber parts. Use only recommended brake fluid in system loose.
4.Car pulls to one side when braking.a) Brake lining socked with oil.
b) Brake lining socked with brake fluid.
c) Brake shoes out of adjustment.
d) Tires not uniformly inflated.
e) Brake line clogged.
f) Defective wheel cylinder.
g) Brake backing plate loose.
h) Mismatched linings.
a) Replace lining and oil seals. Avoid over lubrication.
b) Replace lining, repair or replace wheel cylinders.
c) Adjust
d) Inflate tires correctly
e) Clear or replace line
f) Repair or replace.
g) Tighten
h) Use same linings all around.
5.Soft or spongy pedal.a) Air in system.
b) Brake shoes out of adjustment.
a) Add brake fluid bleed system.
b) Adjust
6.Poor braking action requiring excessive pedal pressure.a) Brake lining soaked with oil.
b) Brake lining solaced with brake oil.
c) Brake shoes out of adjustment.
d) Brake linings water solaced.
e) Brake lining hot.
f) Glazed brake drum.
a) Replace linings and oil seal, avoid over lubrication.
b) Replace linings repair or replace wheel cylinders.
c) Adjust
d) Will be all right when direct out.
e) Allow to cool
f) Turn or grind drum to remove glaze.
7.Brake too sensitive or brake grab.a) Brake shoes out of adjustment.
b) Wrong brake lining.
c) Brake lining greasy.
c) Brake drums scored.
d) Backing plates loose.
a) Adjust
b) Replace with coned Lining.
c) Replace check oil-seals, avoid over lubrication.
d) Turn or grind drums.
e) Tighten adjust brakes.
8.Noisy brakes.a) Brake lining worn.
b) Shoe warped.
C) Shoe rivets loose.
d) Brake drum rough or worn.
e) Loose parts.
a) Replace lining.
b) Replace shoes.
c) Tighten, replace riots or linings as necessary.
d) Turn or grind drums.
e) Tighten.
9.Air in system.a) Plugged filler vent.
b) Leaky valve in muster cylinder.
c) Loose line connections damaged tube.
a) Clear.
b) Repair or replace.
c) Tighten connections, replace damaged line.
10.Loss of brake fluid (oil).a) master cylinder backs
b) Wheel cylinder backs.
c) Loose line connections damaged tube.
a) Repair replace defective part.
b) Repair, install actuating pins correctly.
c) Tighten connection replace damaged line.
11.Brake do not self adjust.a) Adjuster screw stuck.
b) Adjuster lever does not engage star wheel.
c) Adjuster in correctly installed.
a) Free and clean up.
b) Repair free up or replace adjuster.
c) Install correctly.

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