Jeep 1987 Wrangler Workshop Manual page 982

BRAKE SYSTEM
<UJJU—
DIAGNOSIS
«uuy.
If. GRABBING BRAKES - (cont'd.)
POSSIBLE CAUSES CORRECTION
(5) Rear brakeshoes binding on support (5) Clean and lubricate ledges. Replace
plate ledges. support plate(s) if ledges are deeply
grooved. Do not attempt to smooth
ledges by grinding. Replace the plates.
(6) Rear brake support plates loose. (6) Tighten mounting bolts.
101342H
I. DRAGGING BRAKES — (Slow or Incomplete release of brakes.)
S E E
I.S.
N
O
T
E
S
POSSIBLE CAUSES
(1) Brake pedal binding at pivot.
(2) Power brake booster has internal bind.
(3) Parking brake cables incorrectly
adjusted or seized.
(4) Rear brakeshoe return springs
weak or broken.
(5) Automatic adjusters malfunctioning.
(6) Caliper, wheel cylinder or master
cylinder pistons sticking or seized.
(7) Master cylinder compensating ports
blocked (fluid does not return to
reservoirs).
CORRECTION
(1) Loosen and lubricate. Replace pedal
bushings if damaged.
(2) Inspect for internal bind as outlined in
item E, Decreasing Brake Pedal Travel.
Replace unit if internal bind exists.
(3) Adjust cables. Replace seized
cables.
(4) Replace return springs. Replace
brakeshoe if necessary in axle sets.
(5) Repair or replace adjuster parts as
required.
(6) Repair or replace parts as
necessary.
(7) Use compressed air to clear ports.
Do not use wire, pencils, or similar
objects to open blocked ports.
1 0 1 3 4 2 J
J. VEHICLE PULLS WHEN BRAKES ARE APPLIED
POSSIBLE CAUSES
(1) Incorrect front tire pressure.
(2) Worn or damaged wheel bearings.
(3) Brakelining on one side contaminated.
(4) Brakeshoes on one side bent, distorted,
or lining loose on shoe.
(5) Rear brake support plate bent or loose
on one side.
(6) Caliper anchor plate loose on one side.
(7) Caliper piston sticking or seized.
(8) Brakelinings water soaked.
(9) Loose suspension component attaching
or mounting bolts.
CORRECTION
(1) Inflate to recommended cold inflation
pressure.
(2) Replace worn or damaged bearings.
(3) Determine and correct cause of
contamination and replace brakelining in
axle sets.
(4) Replace brakeshoes in axle sets.
(5) Tighten or replace support plate.
(6) Tighten anchor plate bolts.
(7) Repair or replace caliper.
(8) Drive vehicle with brakes lightly applied
to dry linings.
(9) Tighten suspension bolts. Replace worn
suspenson components.
K-10