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 TM 55-1905-221-14-1
4-18.
HYDRAULIC STEERING SYSTEM (Continued).
LOCATION/ITEM
ACTION
REMARKS
SERVICING
2. Steering System
a. Fill system through fill-vent cap (1) in the pilothouse expansion tank (2).
b. Open valves (3) at the bottom of each tank.
c. Open the vent petcock on the storage tank in the engine room.
d. Fill until oil appears at the vent petcock then close it.
e. Continue filling the expansion tank until it is full. Check sight glass (4).
f. Open all ball valves in the system.
g. Prefill suction lines and pumps by loosening pump discharge hoses at the union swivel.
h. Turn pumps over slowly with engines idling, to draw oil into them.
i. When suction occurs in the pumps, retighten discharge lines and close one ball valve in the pump
discharge line.
j. Continue filling the expansion tank and venting the storage tank throughout the filling operation.
k. Turn pumps over at engine idling speed while continuing to purge the system.
4-53
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