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
SEE MORE:
Lower Anchor and Top Tether Anchor Locations
(Top Tether Anchor): Seating
positions with top tether anchors.
(Lower Anchor): Seating
positions with two lower anchors.
To assist in locating the lower
anchors, each seating position with
lower anchors has two labels, near
the crease between the seatback
and the seat cushion.
To assist in lo
Symptoms - antilock brake system
NOTE: The following steps must be completed before using the
symptom tables.
Perform the Diagnostic System Check - Vehicle before using the symptom
tables in order to verify that
all of the following are true:
There are no DTCs set
The control modules can communicate via the serial data li
