Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Park Brake System Description and Operation

Chevrolet Sonic Repair Manual / Chassis / Brakes / Parking Brake / Park Brake System Description and Operation

System Component Description

The park brake system consists of the following:

Park Brake Lever Assembly

Receives, multiplies, and transfers park brake system apply input force from driver to park brake cable system.

Releases applied park brake system when lever release button is depressed and lever is returned to the at rest position.

Park Brake Cables

Transfers input force received from park brake lever, through park brake cable equalizer, to park brake apply lever.

Park Brake Cable Equalizer

Evenly distributes input force to both the left and right park brake units.

Threaded front park brake cable adjuster is also used to remove slack in park brake cables.

Park Brake Apply Lever

Multiplies and transfers input force to park brake actuator/adjuster.

Park Brake Actuator/Adjuster

Uses multiplied input force from apply lever to expand drum brake shoes toward the friction surface of the brake drum.

Threaded park brake actuators/adjusters are also used to control clearance between the drum brake shoes and the friction surface of the brake drum.

System Operation

Park brake apply input force is received by the park brake lever assembly being applied. The input force is multiplied by the lever assembly, transferred and evenly distributed, through the park brake cables and the park brake cable equalizer, to the left and right park brake apply levers. The park brake apply levers multiply and transfer the apply input force to the park brake actuators/adjusters which expand the drum brake shoes toward the friction surface of the brake drum in order to prevent the rotation of the rear tire and wheel assemblies. The park brake lever assembly releases an applied park brake system when it is released and returned to the at rest position.

Park Brake Hardware Inspection
Warning: Refer to Brake Dust Warning. Visually inspect the park brake lever (1) and the lever pivot pin (2) for the following conditions: The lever being bent ...

Park Brake and P (Park) Mechanism Check
Warning: When you are doing this check, the vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of the vehicle in case ...

Other materials:

Tire and Wheel Assembly-to-Hub/Axle Flange Match-Mounting
Note: After remounting a tire and wheel assembly to a hub/axle flange, remeasure the tire and wheel assembly on-vehicle runout in order to verify that the amount of runout has been reduced and brought to within tolerances. Mark the location of the high spot on the tire and wheel asse ...

Bushing and Mating Shaft Inspection
Note: Proper bushing and corresponding mating shaft inspection should be performed before replacing the bushing, shaft, and in some cases, the component which houses the bushing. Thoroughly clean and dry the bushing and shaft surfaces before inspecting for damage. Any of the followin ...

Special Tools
Illustration Tool Number/Description 3-0207944 Main Shaft Tapered Bearing Insert Tool 39506289 Universal Adapter, 2.5L HST Engine 69604356 Gear Pullers ...

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