Buick Encore: Description and operation
DRUM BRAKE SYSTEM DESCRIPTION AND OPERATION
System Component Description
The drum brake system consists of the following:
Drum Brake Shoes
Applies mechanical output force, from hydraulic brake wheel cylinders, to friction surfaces of brake drums.
Brake Drums
Uses mechanical output force applied to friction surface from drum brake shoes to slow speed of tire and wheel assembly rotation.
Brake Drum Hardware
Secures drum brake shoes firmly in proper relationship to hydraulic brake wheel cylinders. Enables sliding motion of brake shoes needed to expand toward friction surface of drums when mechanical output force is applied. Provides return of brake shoes when mechanical output force is relieved.
Brake Drum Adjusting Hardware
Provides automatic adjustments of brake shoes to brake drum friction surface whenever brake apply occurs.
System Operation
Mechanical output force is applied from the hydraulic brake wheel cylinder pistons to the top of the drum brake shoes. The output force is then distributed between the primary and secondary brake shoes as the shoes expand toward the friction surface of the brake drums. The brake shoes apply the output force to the friction surface of the brake drums, which slows the rotation of the tire and wheel assemblies. The proper friction of both the drum brake hardware and adjusting hardware is essential to the proper distribution of braking force.
SPECIAL TOOLS AND EQUIPMENT
SPECIAL TOOLS
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Diagnostic information and procedures
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Fastener Tightening Specifications
BRAKE COMPONENT SPECIFICATIONS
Brake Component Specifications
BRAKE SYSTEM SPECIFICATIONS
Brake System Specific
Repair instructions
Master cylinder reservoir filling
WARNING: Refer to Brake Fluid Irritant Warning
CAUTION: Refer to Brake Fluid Effects on Paint and Electrical
Components Caution .
Visually inspect the brake fluid
SEE MORE:
Malfunction Indicator Lamp (Check Engine Light - Capless)
This light is part of the vehicle's
emission control on-board
diagnostic system. If this light is on
while the engine is running, a
malfunction has been detected and
the vehicle may require service. The
light should come on to show that it
is working when the ignition is in
Service Mode. See Ignitio
Cruise Control
The cruise control lets the vehicle
maintain a speed of about 40 km/h
(25 mph) or more without keeping
your foot on the accelerator. Cruise
control does not work at speeds
below 40 km/h (25 mph).
Warning
Cruise control can be dangerous
where you cannot drive safely at
a steady speed. Do not use
crui
