PACKING 3830519 - Caterpillar

Illustration 1 g01440558
Cross section of a final drive (1) Bearing cup and cone (2) Bearing cup and cone (3) Hub (4) Planetary gears (5) Ring gear (6) Planetary carrier (7) Planetary gears (8) Planetary carrier (9) Sun gear (10) Spindle housing (11) Wheel (12) Sun gear The final drives are located at the ends of each axle housing. Each final drive has the same components. A final drive provides the last speed reduction and the torque increase in the power train. The final drive is a double reduction unit that consists of two planetary gear sets.
Illustration 2 g01440657
Final driveRing gear (5) is splined to hub (3) which is connected to spindle housing (10) by splines. Spindle Housing (10) is fastened to the axle housing. Ring gear (5), hub (3), and spindle housing (10) are held stationary.The axle shaft is connected to the differential by splines. Sun gear (12) is connected to the axle shaft by splines. Sun gear (12) is engaged with planetary gears (4). Planetary gears (4) are held in planetary carrier (6). Planetary carrier (6) is fastened to sun gear (9) by splines. Sun gear (9) is engaged with planetary gears (7) which are held in planetary carrier (8). Carrier (8) is connected to wheel (11) .Power from the differential turnsthe axle shaft. The axle shaft turns sun gear (12). Sun gear (12) turns planetary gears (4). Because ring gear (5) is stationary, the planetary gears move around the inside of ring gear (5). The movement of the planetary gears cause planetary carrier (6) to turn. The planetary carrier is turned in the same direction as sun gear (12) but at a slower speed.Carrier (6) turns sun gear (9). Sun gear (9) turns planetary gears (7). Because ring gear (5) is held stationary, the planetary gears move around the inside of ring gear (5). The movement of the planetary gears cause planetary carrier (8) to turn. Carrier (8) is turned in the same direction as sun gear (9) but at a slower speed. Carrier (8) turns wheel (11) .Each final drive has an oil reservoir. Oil is added to the final drive through a filler plug on the outside cover. Oil is removed from the final drive through a drain plug.The components of the final drives are lubricated from the oil that is inside of the final drives. The oil in the final drives is the same oil that is in the differentials.