Reverse- 1 Gear, Pivot Left Steer

TM 9-2520-249-34&P

2-44.

Reverse- 1 Gear, Pivot Left Steer (fig. 2-12)

Figure 2-12. Hydraulic system, reverse-1 gear, pivot left steer operation-schematic view.

a. Operational Circuits.

Thus driving

left steer clutch (fig. 2-13) and allows the left reverse

clutch to exhaust.

condition uses the same circuitry as forward, first gear,

d. Reverse-1 Signal Circuit. Signal pressure

normal left steer (para 2-41) except that the right

reverse clutch is used as the driving component and left

in this circuit causes a reduction in main pressure. The

steer clutch is used as the steering member. The flow

pressure is reduced in this driving condition to limit the

through the steer valve circuits is also the same as

torque through the driving clutches (para 2-39c).

described for first gear, normal left steer (para 2-41).

b. Pivot Valve (pivot water steer position).

NOTE

The position of the pivot valve does not affect the

The mechanical functions required for

circuits involved for this driving condition.

this travel operation are described in

c. Steer Relay Valve. Signal pressure in the

paragraph 2-52e, and illustrated in

reverse signal circuit enters near the bottom of the steer

relay valve and forces it upward. In this position, the

steer relay valve directs regulated steer pressure to the

2-27