Jeep J-10 Series 1982 Technical & Service Manual page 796

26-4 BRAKES
Service Diagnosis-Power Unit
Condition
Possible Cause
Correction
HARD PEDAL
(NO POWER
ASSIST)
(1)
Refer to EXCESSIVE PEDAL
EFFORT.
(1)
Refer to EXCESSIVE PEDAL
EFFORT in Service Diagnosis
Charts.
(2)
Loss of vacuum to power unit.
(2)
Check for loose hose or check
valve seal. Check for collapsed
or damaged hose. Inspect
vacuum check valve for damage
or leak. Replace parts as required.
-
(3)
Internal malfunction in power
unit.
(3)
Replace power unit.
SLOW RETURN OF
BRAKE PEDAL
(1)
Power unit bellcrank pivot pins
binding (CJ and Scrambler only)
or, pedal binding. See PULLS and
GRABBING BRAKES in Brake
Service Dagnosis Charts.
(1)
Lube all pedal pivot points.
Remove, clean, lube and install
pivot pins.
(2)
Internal malfunction in power
unit.
(2)
Replace power unit.
GRABBING OR
DRAGGING BRAKES
(1)
Bellcrank pivot pins binding
(CJ and Scrambler only).
(1)
Remove, clean, lubricate, and
install pivot pins.
(2) Refer to PULLS and GRAB
BING BRAKES in Service
Diagnosis Charts.
(2)
Refer to PULLS and GRABBING
BRAKES in Service Diagnosis
Charts.
(3)
Push rod (in power unit) binding
due to corrosion or burrs on
push rod.
(3)'
Check and correct as required.
Do not lube push rod. Clean
push rod with brake fluid and
clean cloth only.
(4)
Internal malfunction in power
unit.
(4)
Replace power unit.
60636
Service Diagnosis-Drum Brakes
Condition Possible Cause
Correction
LOW PEDAL OR
PEDAL GOES TO
TOE BOARD
(1)
(2)
Low fluid level.
Excessive clearance between
lining and drums.
(1)
(2)
Fill reservoir with approved
brake fluid.
Adjust brakes.
(3)
Automatic adjusters not working.
(3)
Make forward and reverse stops;
if pedal stays low, repair faulty
adjusters.
(4)
Leaking brake lines. (4)
Repair or replace faulty parts.
60637A