The brake shoe lining material rides against the
brake rotors braking surface. When the brakes are
applied, the shoes apply pressure against the rotor,
thus slowing the vehicle.
As brake shoe linings wear, master cylinder reser-
voir brake fluid level will go down. If brake fluid has
been added to the reservoir, overflow may occur if the
piston is pushed back into the recessed position.
An audible wear indicator (Fig. 7) is mounted on
the outboard pad of the front disc brake assemblies.
Upon contact with the brake rotor, this indicator
emits a sound, signaling that brake shoes may need
inspection or replacement.
DISC BRAKES (REAR)
DESCRIPTION
The rear disc brakes are similar to front disc
brakes, however, there are several distinctive fea-
tures that require different service procedures. This
single piston, floating caliper rear disc brake assem-
bly includes:
• disc brake caliper
• brake shoes (and linings)
• brake rotor
• disc brake caliper adapter
This vehicle is equipped with a caliper assembly
that has a 36 mm (1.42 in.) piston and uses a 14 inch
solid non-vented rotor.
The caliper assembly on all applications float on
rubber bushings using internal metal sleeves which
are attached to the adapter using threaded guide pin
bolts.
The adapter and disc shield are mounted to the
rear suspension knuckles of vehicle. The adapter is
used to mount the brake shoes and actuating cables
for the parking brake system. The adapter also
mounts the rear caliper assembly to the vehicle. The
adapter has two machined abutments which are used
to position and align the caliper and brake shoes for
movement inboard and outboard (Fig. 11).
The parking brake system on all vehicles equipped
with rear disc brakes uses the rear disc brake rotor
as a drum for its brakes.
OPERATION
Rear disc brakes operate similarly to front disc
brakes. Refer to front disc brakes for additional infor-
mation.
When the parking brake is applied, the parking
brake shoes expand out against a braking surface
(hat section) on the inside area of the rear disc brake
rotor.
PARKING BRAKE
DESCRIPTION
The parking brake mechanism on vehicles
equipped with rear disc brakes consists of a small
duo-servo brake which is mounted to the disc brake
caliper adapter. The hat (center) section (Fig. 12) of
the rear rotor serves as the braking surface (drum)
for the parking brakes.
The parking brake shoes are mechanically oper-
ated by an internal lever connected to a flexible steel
cable. The wheel brake (rear) cables are joined at an
equalizer which is attached to the intermediate cable.
The intermediate cable is attached to the front cable
leading to the foot lever.
OPERATION
When the parking brake (foot) lever is pressed, the
cables are pulled, thus actuating the parking brake
shoes. The shoes expand outward against the drum
section of the rear disc brake rotor.
BRAKE LAMP SWITCH
DESCRIPTION
The brake lamp switch is located under the instru-
ment panel at the brake pedal arm (Fig. 13). It con-
trols operation of the vehicle’s brake lamps. Also, if
the vehicle is equipped with speed control, the brake
lamp switch will deactivate speed control when the
brake pedal is depressed.
OPERATION
When the brake pedal is pressed, the plunger on
the outside of the switch extends outward. This
action closes the electrical contacts within the switch,
completing the circuit to the brake lamps at the rear
of the vehicle, thus illuminating the brake lamps and
the center-high-mounted stop lamp (CHMSL).
BRAKE FLUID LEVEL SWITCH
DESCRIPTION
The brake fluid level switch used on this vehicle’s
master cylinder is internal to the master cylinder
fluid reservoir (Fig. 14). The vehicle wiring harness
has a connector which plugs directly into the brake
fluid reservoir.
The brake fluid level switch in the brake fluid res-
ervoir is not a repairable item. If the switch is found
to be defective the entire brake fluid reservoir must
be replaced.
5 - 8 BRAKES LH
DESCRIPTION AND OPERATION (Continued)
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