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TM 5-2410-237-23
TRANSFER AND FINAL DRIVE THEORY OF OPERATION
1.
The main components of the final drives are: bevel gear (1), bevel gear shaft (2), steering clutch inner drum (3), disc
assemblies (4), steel discs (5), steering clutch outer drum (6) (also the brake drum), final drive pinion (7), idler pinion
(8), final drive gear (9), sprocket shaft (10) and sprocket (11).
2.
The bevel gear and steering clutches are in the bevel gear and steering clutch case. The bevel gear and steering clutch
case is the reservoir for the transmission and steering hydraulic systems. As the bevel gear turns, lubricant is thrown on
the bevel gear, bevel pinion and steering clutches for lubrication. The bearings for the bevel gear shaft get lubrication
from the control valve for the steering clutches.
3.
The final drive cases are fastened to the bevel gear and steering clutch case. The final drive cases are reservoirs for oil
for the final drives.
4.
With a steering clutch engaged, power goes from the inner drum (3), through the discs (4), to the outer drum (6). The
steering clutches are normally engaged.
5.
With a steering clutch released, power cannot go from the inner drum to the outer drum.
6.
Splines connect both ends of bevel gear shaft (2) to the drive hub (12). The drive hubs are fastened to inner drums (3) of
the steering clutches. Teeth connect steel discs (5) to the inner drums (3). Teeth connect disc assemblies (4) to outer
drum (6). The outer drum is fastened to the drive hub (13) of pinion (7). Pinion (7) is engaged with idler gear (8). The
idler gear is engaged with the final drive gear (9). Splines connect sprocket (11) to the final drive gear. The teeth of the
sprocket are engaged with the track pins.
7.
When a steering clutch is engaged, the flow of power is: from the bevel gear (1) through bevel gear shaft to inner drum
(3). The inner drum turns steel discs (5). The steel discs turn disc assemblies (4). The disc assemblies turn outer drum
(6). The outer drum turns final drive pinion (7). The final drive pinion turns idler gear (8). The idler gear turns final
drive gear (9). The gear turns sprocket (11). The sprocket turns the track.
8.
When a steering clutch is not engaged, the connection between bevel gear (1) and final drive pinion (7) is broken. Power
does not go through the final drive to the track.
13
6
7
8
4
1
2
11
10
12
5
3
9
387-510
END OF WORK PACKAGE

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