Reverse-2 Gear, Straight Travel Operation

TM 9-2520-249-34&P

Thus, the engaged clutches cause the vehicle to travel

d. Reverse Signal Circuit. Main pressure is

in reverse.

directed from the manual selector valve to the steer

NOTE

relay valve. The oil enters near the bottom of the steer

relay valve but above the geared steer signal plug. This

The related mechanical functions required

causes the steer relay valve to move to the upward

for this travel condition are described in

position.

paragraph 2-50e, and illustrated in figure 2-

e. Drive Relay Valve. Main-pressure oil from

19.

the steer valves is directed to the drive relay valve. The

2-40. Reverse-2 Gear, Straight Travel Operation

drive relay valve, in the upward position, directs the oil

through the left, and right, drive feed passages to the

steer relay valve.

Steer Relay Valve. The steer relay valve

directs main-pressure oil through the reverse clutch

apply lines to the respective reverse clutches (fig. 2-13).

Figure 2-8. Hydraulic system, reverse 2 gear, straight travel operation-schematic view

a. Operational Circuits. This driving condition

reverse-2 detent. This allows a main-pressure port

(upper passage) to index with an intermediate range

uses the same circuitry as reverse-1, straight travel.

clutch apply port. The low-range clutch (or high-range

(para 2-39), except that the intermediate range clutch is

clutch) is exhausted simultaneously

engaged.

b. Manual Selector Valve.

The valve is

moved toward the left until the retaining ball rests in

2-22