TM 5-2410-241-23-1
0009
PRIMARY POWERTRAIN CONTINUED
Service Brakes
0009
The brakes are included in two different components of the machine.
One component, which is located on the left side of the machine, is called the steering differential and brake. The
other component, which is located on the right side of the machine, is called the planetary gears and brake.
The brakes are used to stop the machine. The brakes do not assist in the steering of the machine.
The brake components include:
hub (Figure 18, Item 13),
carrier (Figure 18, Item 6),
brake pistons (Figure 18, Items 10 and 4),
retainer (Figure 18, Item 12),
stationary ring gear (Figure 18, Item 1),
Belleville springs (Figure 18, Iem 9) and (Figure 18, Item 5),
t
housings (Figure 18, Items 14 and 3),
and friction discs and brake plates(Figure 18, Items 11 and 2).
The brakes are engaged by Belleville springs (Figure 18, Items 9 and 5). The brakes are released by pressure oil
from the brake control valve. The operator controls the brake control valve with a service brake foot pedal.
During movement of the machine, pressure oil is sent through passages in the brake housings (Figure 18, Items 14
and 3) to chambers (Figure 18, Items 7 and 8). Since the brakes are held in the released position, the outer axle
shafts rotate freely.
When the service brake pedal is pushed, pressure oil to chambers (Figure 18, Items 7 and 8) is stopped. The
chambers are opened to the drain. Belleville springs (Figure 18, Items 9 and 5) then push brake pistons (Figure 18,
Items 10 and 4) against friction discs and brake plates (Figure 18, Items 11 and 2). Friction discs and brake plates
(Figure 18, Items 11 and 2) stop the rotation of powertrain components: hub (Figure 18, Item 13), carrier
(Figure 18, Item 6), and the outer axle shafts.
The machine stops. The engine is in torque converter stall condition.
0009-22
