TM-9-2520-238-34
M113A1 FOV, M113A2 FOV, M548 AND M548A1
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL; RIGHT ANGLE DRIVE, COOLING FAN; GEARCASE, TRANSFER; DRIVE ASSEMBLY, FINAL; DIFFERENTIAL, STEERING CONTROL; BRAKE, SINGLE DISK; CYLINDER ASSEMBLY, HYDRAULIC BRAKE
TM-9-2520-238-34 - Page 26 of 319
((13 TEETH ON ASSEMBLY A))
TM 9-2520-238-34
EQUIPMENT DESCRIPTION AND DATA — Continued
0002 00
PIVOT BRAKE RELEASED.
Upon release of hydraulic pressure, wave washers in the housings pull the pistons and linings
away from the brake disk and releasing the disk and output shaft on the differential.
REPAIR FINAL DRIVE ASSEMBLIES
GENERAL.
Final drive assemblies transmit power from the steering control differential to the track drive sprockets. The final
drives consist of reduction gears encased in a forged housing with a cast cover and use a flat gasket to seal the cover to the
FINAL DRIVE ASSEMBLIES A AND B.
Final drive A has a spur gearshaft with 13 teeth and a spur gear with 56
teeth, resulting in a gear ratio of 4.308:1.
Final drive B has a spur gearshaft with 14 teeth and a spur gear with 55 teeth,
resulting in a gear ratio of 3.929:1.
Final Drive Assembly A and B
0002 00-11
housing.
SPUR GEAR
(55 TEETH ON ASSEMBLY B)
(56 TEETH ON ASSEMBLY A)
SPUR GEARSHIFT
(14 TEETH ON ASSEMBLY B)
(13 TEETH ON ASSEMBLY A)
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