Buick Encore Owners & Service Manuals

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

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS AND EQUIPMENT

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     Hydraulic Brakes

     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:

     Filling the Tank (Capless Fuel Fill)

    An arrow on the fuel gauge indicates which side of the vehicle the fuel door is on. See Fuel Gauge Warning Fuel vapors and fuel fires burn violently and can cause injury or death. Follow these guidelines to help avoid injuries to you and others: Read and follow all the instructions on the fuel

     Maintenance and Lubrication

    SPECIFICATIONS APPROXIMATE FLUID CAPACITIES The following approximate capacities are given in English and metric conversions. All capacities are approximate. When adding, be sure to fill to the approximate level as recommended in this manual. Recheck fluid level after filling. FLUID AND LUBRICAN

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