TM 5-3895-383-24
Final Drive
SMCS Code: 5655; 5656
Part No.: 152-0287
Illustration 62
Final Drive
(1) Final drive housing. (2) Inner planetary gears. (4) Ring gear. (5) Outer carrier. (6) Outer planetary gears. (7) Input shaft. (8) Inner
sun gear. (9) Inner sun gear. (10) Brake plates. (11) Brake discs. (12) Stationary housing. (13) Coupling. (14) Brake piston. (15)
Passage for charge oil.
The final drive takes power from the drum drive motor and the
power is sent to the drum. Final drive housing (1) is attached
to the drum drive plate. The final drive provides three-stage
gear reduction through the use of planetary gears.
Power from the drum drive motor is sent to the torque hub by
the motor output shaft. Outer planetary gears (6) mesh with
outer gear of input shaft (7). The rotation of input shaft (7)
causes outer planetary gears (6) to turn. The planetary gears
move around the inside of ring gear (4).
The movement of the planetary gears around the ring gear
causes outer carrier (5) to turn. The outer carrier is connected
to inner sun gear (8) by splines. The rotation of the outer
carrier and the inner sun gear causes inner planetary gears (2)
to turn.
Inner carrier (3) is connected to inner sun gear (9) by splines.
As the inner carrier (3) is held stationary, inner planetary gears
(2) rotate inside ring gear (4). This movement causes gearbox
housing (1) to turn. This transfers the power to the drum drive
plate.
The final drive has a separate oil supply. All components get
lubrication oil as the gears move through splash lubrication.
The parking brake is spring applied and pressure released.
Brake discs (11) are splined to coupling (13). Brake plates (8)
are splined to output housing (12).
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