WIRE AS 8Y5572 - Caterpillar

Illustration 1 g00480626
Final Drives (1) Sun gear shaft (2) Sprocket hub (3) Hub (4) Ring gear (5) Planetary carrier (6) Spindle housing (7) Sprocket segments (8) Planetary gearsThe final drive is a modular single reduction planetary gear set. The final drives cause the last speed reduction in the power train. The final drives cause the last torque increase in the power train.Ring gear (4) is fastened to hub (3). Hub (3) is connected to spindle housing (6) by splines. Spindle housing (6) is fastened through the brake housing to the case. Ring gear (4), hub (3) and spindle housing (6) are held stationary.Sun gear shaft (1) is connected to the steering clutch output hub by splines. Sun gear shaft (1) is engaged with planetary gears (8). Planetary gears are held in planetary carrier (5). Planetary carrier (5) is fastened to sprocket hub (2) .The power from the steering clutches is sent to the final drive by sun gear shaft (1). The rotation of sun gear shaft (1) causes planetary gears (8) to turn. Since ring gear (4) is held by hub (3), the planetary gears (8) move around the inside of ring gear (4) .The movement of the planetary gears causes planetary carrier (5) to turn. The planetary carrier is turned in the same direction as sun gear shaft (1), but at a slower speed. The planetary carrier (5) turns sprocket hub (2). Sprocket segments (7) are fastened to the sprocket hub (2). The sprocket segments drive the track as the sprocket hub turns. Oil is supplied separately for the final drives. All components receive lubrication oil as the gears move, and all components receive lubrication through splash lubrication.