FINAL DRIVE SYSTEM CONTINUED
Final Drive - Operation
External splines on the output shaft of drive motor (Figure 2, Item 1) connect with the internal splines of the input
shaft (Figure 2, Item 9). Drive motor rotation causes the input shaft to transmit power through the final drive. The
input shaft turns the bull gear (Figure 2, Item 8). The bull gear causes the sun gear (Figure 2, Item 7) to turn. The
ring gear (Figure 2, Item 5) is held stationary. Movement of the sun gear shaft (Figure 2, Item 7) causes the
planetary gears (Figure 2, Item 3) to move around inside the ring gear. Rotation of the planetary gears causes
planetary carrier (Figure 2, Item 4) and sprocket hub (Figure 2, Item 6) to turn. Sprocket segments, which are
connected to the sprocket hub (Figure 2, Item 2), then drive the track.
The final drives have their own supply of lubrication. There are filler plugs and drain plugs in the planetary carrier
(Figure 2, Item 4). A drain plug is also located in the bottom of the final drive case (Figure 2, Item 2) in order to
drain the oil from the area of the bull gear (Figure 2, Item 8).
Figure 2. Final Drive Operation.
END OF WORK PACKAGE