BOLT 0949200 - Caterpillar

Illustration 1 g00517057
Final Drive
(1) Outer axle shaft
(2) Sprocket segments
(3) Inner planetary gears
(4) Outer planetary gears
(5) Inner sun gear
(6) Outer sun gear
(7) Outer carrier
(8) Ring gear
(9) Inner carrier
(10) Hub
(11) Duo-cone seal kits The final drives take power from the steering clutches and the final drives send the power to the tracks. The final drives give a double reduction through the use of planetary gears.The power from the steering clutches is sent to the final drive by outer axle shaft (1).Inner sun gear (5) is fastened by splines to outer axle shaft (1). The rotation of the outer axle shaft and the inner sun gear causes inner planetary gears (3) to turn.Ring gear (8) is a stationary component. As the planetary gears turn the gears move around the inside of the ring gear.The movement of the planetary gears around ring gear (8) causes inner carrier (9) to turn. The inner carrier is connected to outer sun gear (6) by splines. The rotation of the inner carrier and outer sun gear causes outer planetary gears (4) to turn.Outer planetary gears (4) move around the inside of ring gear (11). The movement causes outer carrier (7) and hub (10) to turn. The power is sent to sprocket segments (2) and the track.The final drives have a separate oil supply. All components get lubrication oil as the gears move. The oil is thrown around the housing (splash lubrication).