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| Illustration 1 | g00577420 |
Final Drive Components (1) Brake group (2) Wheel assembly (3) Planetary carrier (4) Cover assembly (5) Sun gear (6) Planetary gears (7) Ring gear (8) Hub (9) Spindle housing | |
Each final drive has the same components. A final drive causes the last speed reduction. A final drive also causes an increase in torque in the power train.
The ring gear (7) is fastened to the hub (8). The hub (8) is connected to the spindle housing (9) by splines. The spindle housing (9) is fastened to the axle housing. The ring gear (7), the spindle housing (9) and the hub (8) are held stationary.
The axle shaft is connected to the differential by splines. The sun gear (5) is connected to the differential by splines. The sun gear (5) is connected to the axle shaft by splines. The sun gear (5) is engaged with the planetary gears (6). The planetary gears (6) are held in the planetary carrier (3). The planetary carrier (3) is fastened to the wheel assembly (2) .
The power from the differential turns the axle shaft. The axle shaft turns the sun gear (5). The sun gear (5) turns the planetary gears (6). Since the ring gear (7) is held by the hub (8), the planetary gears (6) move around the inside of the ring gear (7). The movement of the planetary gears causes the planetary carrier (3) to turn. The planetary carrier (3) is turning in the same direction as the sun gear (5) but at a slower speed. The planetary carrier (3) turns the wheel assembly (2) .
Each final drive has an oil reservoir. Oil is filled into the final drive through a check/fill plug. The check/fill plug is located on the outside cover assembly (4). Oil is removed from the final drive through a drain plug on cover assembly (4) .
The components of the final drives get lubrication from the oil inside the final drives.