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Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
Park Brake Pedal
Identification
Hole*
Pedal Latch Arm
Kick Off Cam
Set Screw
Cam Pivot
Washers
Part of
Accelerator
Pedal
BRAKE SYSTEM OVERVIEW
General Description
This vehicle is equipped with a mechanically activated
rear drum brake system. The brake system consists of a
brake and parking brake pedal, parking brake release
linkage, compensator assembly, equalizer link, brake
cables and self adjusting wheel brake assemblies (Figure
1).
Mechanical brakes depend on the travel of the brake
cables to move the brake shoes against the brake drums.
The travel of the brake cables is controlled by the brake
pedal. If the cables cannot travel far enough to absorb the
slack (free travel) in the system and still apply the shoes
to the drums, the braking effort at the wheel brake will not
be adequate. The self adjusting mechanism in the wheel
brakes requires enough cable travel at the wheel brake to
work reliably. When the brake is released, there must be
653045
Torsion Springs
Lock Nut
Nylock Nut
Park Brake
Release Linkage
Bushing
Figure 1 Mechanical Brake System
Repair and Service Manual
BRAKES
Push Nut
Hinge Pin
Service Brake Pedal
Spacer
Catch Bracket
Cap Screw
Pedal Bumper
Brake Pedal Pivot Bolt
Compensator Assembly
Bushing
Torsion Spring
Retaining Ring
Brake Cables
Self Adjusting
Wheel Brake
slack in the system so the brakes will release fully and the
adjusters will function. Free pedal travel, pedal force,
shoe to drum clearance and braking capability are closely
related. It is very important to maintain the proper rela-
tionships to assure braking performance and the best
wheel brake adjustment.
How the Brake Works
Pressing the brake pedal pulls the compensator assem-
bly and equalizer link, which are connected to the brake
cables (Figure 1). The first part of the pedal travel
removes slack from the system. Continued motion of the
brake pedal pulls both the left and right brake cables.
Each brake cable pulls a brake lever which pushes the
rear brake shoe against the brake drum. When the rear
shoe contacts the brake drum, it can no longer move rear-
ward. Additional pedal (and cable) travel causes the actu-
ator bracket (moving anchor) to move and applies force to
BRAKES
Equalizer Link
Spherical Nut
Jam Nut
Part of Frame
Brake Lever
B
Clevis Pin
Cotter Pin
41
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