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 TM 55-1925-273-10-2
0121 00
SECURE HAND-HYDRAULIC STEERING
Once the malfunction is repaired, the steering system can return to normal operation.
1.
CLOSE the following valves:
a.
SH-7, HAND PMP C.O.V. (figure 1, item 1)
b.
SH-8, HAND PMP C.O.V. (figure 1, item 2)
1
2
1
0
Figure 2. Steering Gear Motor Controller
PERFORM MANUAL POWER-HYDRAULIC STEERING
Manual power hydraulic steering mode is used when a malfunction results in loss of control in the pilothouse, but power is
still available at the steering hydraulic power pack Auxiliary Machinery Space (AMS) 2.
NOTE
No change to valve alignment is necessary for this steering method.
1.
On the steering gear motor controller, set the change-over switch (figure 2, item 1) to LOCAL CONTROL position 3.
NOTE
There are two power packs, one for each rudder.
The vessel heading is indicated on the bulkhead mounted compass repeater. Use the sound-
powered telephone headset to communicate with the pilothouse for course changes.
2.
Steer the vessel, using the following procedure:
a.
Adjust the course to LEFT by pressing down on the port control valve handle (figure 3, item 1) on each power pack.
b.
Adjust the course to RIGHT by pressing down on the starboard control valve handle (figure 3, item 2) on each
power pack.
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