BRAKES
5-5
DIAGNOSIS TABLE
Condition
Possible Cause
Correction
Not enough
braking force
Brake oil leakage from brake lines.
Brake disc or pads stained with oil.
Overheated brakes.
Poor contact of shoes on brake drum.
Brake shoes linings stained with oil or wet with
water.
Badly worn brake pad linings.
Defective wheel cylinders.
Malfunctioning caliper assembly.
Air in system.
Locate leaking point and repair.
Clean or replace.
Determine cause and repair.
Repair for proper contact.
Replace.
Replace.
Repair or replace.
Repair or replace.
Bleed system.
Brake pull
(Brakes not
working in
unison)
Pad linings and/or shoe linings are wet with wa-
ter or stained with oil in some brakes.
Drum-to-shoe clearance out of adjustment in
some brakes.
(Malfunctioning auto adjusting mechanism)
Disc and/or drum is out of round in some
brakes.
Wheel tires are inflated unequally.
Malfunction in wheel cylinders.
Disturbed front end alignment.
Unmatched tires on same axle.
Restricted brake pipes or hoses.
Malfunctioning caliper assembly.
Loose suspension parts.
Loose calipers.
Replace.
Check for inoperative auto adjusting
mechanism.
Replace.
Inflate equally.
Repair or replace.
Adjust as prescribed.
Tires with approximately the same
amount of tread should be used on the
same axle.
Check for soft hoses and damaged lines.
Replace with new hoses and new brake
piping.
Check for stuck or sluggish pistons and
proper lubrication of caliper slide bush.
Caliper should slide.
Check all suspension mountings.
Check and torque bolts to specifications.
Noise (high
pitched squeak
without brake
applied)
Front lining worn out.
Replace linings.
Excessive
pedal travel
(Pedal stroke
too large)
Partial brake system failure.
Insufficient fluid in master cylinder reservoirs.
Air in system (soft/spongy pedal).
Rear brake system not adjusted
(malfunctioning auto adjusting mechanism).
Bent brake shoes.
Worn rear brake shoes.
Check brake systems and repair as nec-
essary.
Fill reservoirs with approved brake fluid.
Check for leaks and air in brake system.
Check warning light. Bleed system if re-
quired.
Bleed system.
Repair auto adjusting mechanism.
Adjust rear brakes.
Replace brake shoes.
Replace brake shoes.
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Страница 644: ...Prepared by Overseas Service Department 1st Ed October 1999 Printing 646 ...