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| Illustration 1 | g03663687 |
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(1) Parking brake
(2) Actuator | |
The spring engaged, hydraulically released parking brake (1) is bolted to the drive line of the 820K Series machines. When the parking brake switch in the operator compartment is energized, pressurized oil enters the actuator ( 2) and moves the actuator piston against the spring force. This action the parking brake to release.
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| Illustration 2 | g00474334 |
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Front View Of The Parking Brake Control Assembly (1) Actuator. (5) Drum. (6) Yoke. (7) Shoes (two). (8) Brake assembly. (9) Rod. (10) Lever. (11) Shaft. (12) Cage. | |
The parking brake is a dry brake drum assembly. A spring engages the brake and oil disengages the brake. The spring is located in actuator (1). As drive shaft (11) rotates, drum (5), and yoke (6) also rotate. Brake assembly (8), and lever (10) are fastened to cage (12), which remains stationary.
When the parking brake is engaged, rod (9) moves lever (10) which will actuate brake assembly (8). Brake assembly (8) consists of three retraction springs and two brake shoes. The assembly is mounted on a plate assembly.
The brake assembly operates in the following manner. When lever (10) is actuated, the plate assembly will expand. Shoes (7) inside brake assembly (8) press against drum (5) preventing shaft (11) and yoke (6) from turning.