Jeep J-10 Series 1982 Technical & Service Manual page 799

BRAKES 26-7
Service Diagnosis-Drum Brakes (Continued)
Condition Possible Cause
Correction
ALL BRAKES DRAG
(ADJUSTMENT IS
KNOWN TO BE
CORRECT
(Continued)
(4]
(5]
Compensating or bypass port of
master cylinder closed.
Use of inferior hydraulic fluid
or rubber parts. (Swollen cups,
corroded wheel or master
cylinder bores.
(4)
(5)
Open with compressed air.
Overhaul wheel and/or master
cylinder.
BRAKE PEDAL
TRAVEL DE
CREASING
<r
Master cylinder compensating
port plugged.
(1)
Use compressed air to unplug.
(2]
1 Power unit bellcrank pivot pins
binding (CJ and Scrambler only) or
pedal pivot binding on manual
brakes.
(2)
Lube pedal pivot or pivot pins.
(3]
Swollen cup in master cylinder.
(3)
Replace rubber parts. Flush system
(4] i Master cylinder piston not
returning.
(4)
Overhaul master cylinder.
(5]
Wheel cylinder pistons sticking. (5) ) Overhaul wheel cylinder.
ONE WHEEL DRAGS (1)
1 Weak or broken brake shoe
retracting springs.
(1)
Replace the defective brake shoe
springs and lubricate the brake
shoe ledges.
(2)
Power unit bellcrank pivot pins
binding (CJ and Scrambler only) or
pedal pivot binding.
(2)
Lube pedal pivot or pivot pins.
(3) Insufficient brake shoe-to-drum
clearance.
(3]
Adjust brakes. Repair auto
matic adjusters if necessary.
(4)
Loose wheel bearings.
(4)
Adjust wheel bearings.
(5)
Wheel cylinder piston cups
swollen and distorted.
(5] ) Overhaul wheel cylinders.
(6)
Pistons sticking in wheel cylinder.
(6)
Clean or replace pistons; clean
cylinder bore.
(7)
Restriction in brake line. (7]
Clean out or replace.
(8)
Loose anchor pin.
(8)
Adjust and tighten lock nut.
(9)
Parking brake components seized
or incorrectly adjusted.
(9)
Repair or replace parts as
necessary.
E WHEEL LOCKS
(1)
Contaminated linings.
(1)
Replace the linings.
(2)
Wom tire treads.
(2)
Replace tire or, match up tire
treads from side to side.
60637D