CARRIER MOVING TO LEFT WITH LEFT STEERING BRAKE APPLIED

TM 9-2520-238-34

EQUIPMENT DESCRIPTION AND DATA -- Continued

0002 00

CARRIER MOVING TO LEFT WITH LEFT STEERING BRAKE APPLIED. When left brake is applied, the external spur gears

and spur gearshafts continue to rotate at the same velocity. Since the brake impedes or even stops the rotation of the brake

drum hub, the left external gears, in mesh with the hub gear, begin to rotate on their own axes. The gearshafts, fixed to the

external gears, rotate in a direction which slows the rotation of the left steering spur gear, and the track speed on the left side

of the carrier decreases. At the same time, the right gearshafts, in mesh with companion left gearshafts, rotate in the opposite

direction, which speeds rotation of right steering spur gear, and increases track speed on right side of carrier.

Steering Control Differential Left Steer Torque Path

0002 00-9