Second Gear, Normal Right Steer Operation

TM 9-2520-249-34&P

circuit seats the air valve which causes the brake

A slight movement produces a slight apply pressure-

coolant pump to direct coolant to the left J reverse

greater movement produces greater apply pressure.

clutch

c. Right Steer Valve.

(1) During left steer operation, the right

steer valve is moved upward. (The steer valves move

NOTE

in opposite directions due to an interconnecting pivot

The related mechanical functions required

arm.) The upward movement of the right steer valve

for this travel operation are described in

does not interrupt the apply circuit to the right steer

paragraph 2-51a, and illustrated in figure 2-

clutch. Thus, it remains engaged as the driving clutch

21.

(2) The lower portion of the valve also

2-42.

Second Gear, Normal Right Steer Operation

moves upward. This movement allows main-pressure

oil to enter the left steer signal circuit. Pressure in this

Figure 2-10. Hydraulic system, second gear normal right steer operation-schematic view.

a. Operational Circuits. This driving condition uses

In this steering mode, the geared steer clutch is used as

the steering clutch and the output clutch is the driving

the same circuitry as second gear, straight travel (para

clutch.

2-36), except that the flow of oil through the steer valves

charges the right steer clutch and the left output clutch.

2-24