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 23 of 319
TM 9-2520-238-34
EQUIPMENT DESCRIPTION AND DATA — Continued
0002 00
OPERATION
GENERAL.
Understanding the movement of parts in relation the movement of the carrier is important for proper maintenance
of the differential. Each steering function, in relation to the operation of parts when the carrier is moving ahead, is described
below. When the carrier is in reverse, all parts rotate in the opposite direction.
CARRIER MOVING STRAIGHT AHEAD.
The right angle gearbox receives torque into the differential, changes torque
direction 90
, and transmits the torque to the left flange of the steering unit assembly. When the carrier is moving straight
ahead, the steering unit assembly revolves as a unit about a central axis. The output shafts and brake drums revolve at the
same velocity as the steering unit, with no change in gear rotation, and the external spur gears and gearshafts do not revolve
on their own axis.
Steering Control Differential Straight Forward Torque Path
0002 00-8
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