Jeep 1979 CJ-5 Technical & Service Manual page 597

Service Diagnosis-Power Unit
Condition Possible Cause Correction
HARD PEDAL
(NO POWER
ASSIST)
(1)
Refer to EXCESSIVE PEDAL
E F F O R T .
(1)
Refer t o EXCESSIVE PEDAL
E F F O R T in Service Diagnosis
Charts.
(2)
Loss of vacuum t o 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 O F
BRAKE PEDAL
(1) Power unit bellcrank pivot pins
binding (CJ only) or, pedal bind-
ing. See PULLS and GRABBING
BRAKES in Brake Service
Diagnosis 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
( C J o n l y ) .
(1)
Remove, clean, lubricate, and
install pivot pins.
(2)
Refer to PULLS and GRAB-
BING BRAKES in Brake Service
Diagnosis Charts.
(2)
See 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 n o t lube push rod. Clean
push rod with brake fluid and
clean cloth only.
(4)
Internal malfunction in power
unit.
(4) Replace power unit.
Service D i a g n o s i s - D r y m Brakes
60636
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 n o t working.
(3)
Make forward and reverse stops;
if pedal stays low, repair faulty
adjusters.
(4) Leaking brake lines.
(4)
Repair or replace faulty parts.