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:
Engine Controls and Fuel - 1.4L - Description and operation
Camshaft actuator system description
Camshaft Actuator System Overview
Fig. 1: Identifying Camshaft Actuator System Components
The camshaft actuator system enables the engine control module (ECM) to
change camshaft timing of all 4
camshafts while the engine is operating. The camshaft position
Repair instructions - off vehicle
Engine support fixture
Fig. 237: Engine Support Fixture Components
Engine Support Fixture
ENGINE MOUNT BRACKET REMOVAL
Fig. 238: Engine Mount Bracket And Bolts
Remove the 3 engine mount bracket bolts (1).
Remove the engine mount bracket (2).
CAMSHAFT TIMING CHAIN INSPECTION
Special Tools
