TM 5-2410-240-23-1
0010
ELECTRO-HYDRAULIC CONTROLS CONTINUED
Parking Brake Mechanical Operation
00010
The brake housing (Figure 4, Item 10) mounts directly to the final drive case (Figure 4, Item 2). The splines on the
outside diameter of input shaft (Figure 4, Item 8) connect to the driven plates (Figure 4, Item 4) in the brake
housing. Internal splines of the input shaft connect to the external splines on the output shaft of the drive motor
(Figure 4, Item 7).
When the brakes are applied, the spring (Figure 4, Item 1) pushes on the plate (Figure 4, Item 5). Pressure against
the plate holds the discs (Figure 4, Item 3) and the driven plates (Figure 4, Item 4) together.
When the brakes are released, oil pressure to the brake moves the piston (Figure 4, Item 6) away from the discs
(Figure 4, Item 3) and the driven plates (Figure 4, Item 4). The piston and the lock ring (Figure 4, Item 9) pull the
plate (Figure 4, Item 5) away from the discs and driven plates. This occurs against the force of the spring (Figure 4,
Item 1).
When oil pressure overrides the spring force that holds the discs (Figure 4, Item 3) and the driven plates (Figure 4,
Item 4) together, then the input shaft (Figure 4, Item 8) and the pinion are free to turn when the drive motor output
shaft turns. This allows the operator to move the machine in either direction.
0010-8
