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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
(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

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