Parking Brake Adjustment - Jeep 1979 CJ-5 Technical & Service Manual

BRAKES 26-15
differential between front and rear brake hydraulic sys-
tems should ever occur.
On vehicles with a parking brake warning system, the
lamp also functions as a signal device to alert the driver
when the parking brakes are applied.
In the parking brake signal mode, the lamp is acti-
vated by a mechanically operated switch mounted on the
parking brake lever assembly. In the brake hydraulic
pressure differential warning mode, the lamp is acti-
vated by a plunger-type switch located in the com-
bination valve.
If a pressure loss should occur in either the front or
rear brake hydraulic systems, a pressure differential of
70 to 300 psi (483 to 2 068 kPa) will cause a piston in the
pressure differential section of the combination valve to
shuttle toward the low pressure side of the valve. As the
piston moves toward this side of the valve, ramps on the
piston contact the differential switch plunger forcing it
upward and closing the switch internal contacts. This
completes the electrical circuit between switch and
warning lamp causing the lamp to light. Unless the
ignition lock cylinder is turned to the OFF position, the
lamp will remain illuminated until the cause of the
pressure differential is corrected.
In normal operation, with the ignition lock cylinder
turned to the Start Position, the warning lamp will
illuminate and remain so until the engine Is started and
the lock cylinder is returned to the On position, or when
the parking brakes are released. This feature is provided
as a means of checking warning lamp bulb and circuit
operation.
PARKING BRAKE A D J U S T M E N T
N O T E : The service brakes must be adjusted before ad-
justing the parking brakes.
(1) Release parking brakes.
(2) Loosen equalizer locknuts to release tension on
cables (fig. 2G-3 and 2G-4).
(3) Inspect all cables for binds, kinks, or frayed
condition. Replace damaged cables.
(4) Tighten equalizer locknut until slight drag is
produced at wheels.
(5) Loosen equalizer locknut until wheels rotate
freely and brake drag is eliminated.
CLIP H A N D L E
Fig. 2G-3 Parking Brake Assembly—CJ Models
8 0 3 4 0