Chevrolet Trax: 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
DTC C0267: Low brake fluid indicated
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
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Paint and Coatings - Introduction
BASECOAT/CLEARCOAT PAINT SYSTEMS
WARNING: Exposure to isocyanates during paint preparation and
application
processes can cause severe breathing problems. Read and follow all of
the instructions from the manufacturers of painting materials, equipment,
and protective gear.
All paint finish repairs of
Brake pad inspection
Fig. 7: Disc Brake Pads And Audible Wear Sensors
WARNING: Refer to Brake Dust Warning .
Inspect the disc brake pads at regular intervals, or whenever the tire
and wheel assemblies are removed
from the vehicle.
If replacement is necessary, always replace disc brake pads in axle sets.
Inspect
