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 TM 55-1905-242-14
0030 00
Transmission Backdriving (continued)
c.
Repeat this process every 8 hours when the transmission is being backdriven.
STEERING FAILURE
If one steering pump or one propulsion engine fails, the steering system will continue to operate using the remaining pump
or engine. If both steering pumps fail, steering can still be accomplished by turning the helm. With both steering pumps
inoperative, the helm unit acts as its own hydraulic pump. Should the hydraulic steering system fail completely, the vessel
can be steered with the emergency tiller or by varying engine speed.
Steering With the Emergency Tiller
1.
OPEN the bypass valves (29), two port and two starboard, in the lazarette to permit manual steering. Leave the four
isolation valves (30) OPEN.
RUDDER ARM (p/s)
TIE ROD
STEERING
CYLINDER (p/s)
30 (p/s)
29 (p/s)
2.
Remove the deck plate (31) over the port or starboard rudder stock in the main deck.
3.
Remove the emergency tiller (32) from its stowage brackets on the main deck, aft.
4.
Insert the emergency tiller (32) over the upper square rudder stock.
WARNING
Steering the LCM-8 Mod 2 with the emergency tiller must be accomplished at engine
speeds below 1500 r/min. Steering by the emergency tiller at speeds over 1500 r/min may
endanger the tiller operator and cause loss of steering control. Failure to comply could
result in serious injury or death to personnel.
5.
Steer the vessel by operating the emergency tiller. To turn the vessel to starboard, the emergency tiller must be moved
port. To turn the vessel to port, the emergency tiller must be moved starboard.
0030 00-10
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