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 TM 55-1925-273-10-2
OPERATOR'S MANUAL
INLAND AND COASTAL LARGE TUG (LT)
OPERATION UNDER UNUSUAL CONDITIONS
STEERING SYSTEM FAILURE
INITIAL SETUP:
Personnel Required:
References:
One Watercraft Engineer, 88L
WP 0077 00 (volume 1)
One Watercraft Operator, 88K
GENERAL
Emergency steering may be accomplished with:
1.
Hand-hydraulic steering.
2.
Manual power hydraulic steering.
PERFORM HAND-HYDRAULIC STEERING
When power is lost at the steering hydraulic power pack, hand-hydraulic steering is used. For hand-hydraulic steering, use
the following procedures:
1.
OPEN 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).
2.
Secure both steering pumps by placing each steering gear motor controller selector switch (figure 2, item 1) in the STOP
position.
NOTE
Vessel heading is indicated on the bulkhead mounted compass repeater. Use the sound powered
telephone headset to communicate with the pilothouse for course changes.
3.
Steer the vessel using the following procedure:
NOTE
Two crewmembers are required for this operation.
a.
If rudder movement to LEFT is required:
(1)
One crewmember rotates the handwheel (figure 1, item 3) to provide hydraulic pressure and flow to the
steering gear.
(2)
When the desired rudder angle is attained, stop rotating the hand wheel.
b.
If rudder movement to RIGHT is required, repeat steps 3a (1-2).
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