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 TM 55-1905-242-14
UNIT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
STEERING SYSTEM COUNTERBALANCE VALVE, ADJUST
INITIAL SETUP:
Tools and Special Tools:
Personnel Required:
Tool Kit, Mechanic's Rail and Marine
Three Watercraft Engineers, 88L
(Item 1, Table 1, WP 0230 00)
References:
Equipment Condition:
TM 55-1905-242-24P (WP 0083)
Propulsion engines running at idle
ADJUST
1.
Position one crewmember in the pilothouse to observe the pilothouse steering system hydraulic pressure gauge read-
ings. This crewmember should establish and maintain contact with the crewmember in the lazarette.
2.
Isolate the port steering cylinder by closing the port isolation valves (1 and 2).
12
3.
Check that the normally closed bypass valves (3 and 4) for the port steering cylinder are CLOSED.
4.
Turn the helm wheel in the pilothouse slowly in one direction while observing the steering system hydraulic pressure
gauge. Slowly turn the wheel throughout the adjustment procedure.
5.
Notify the crewmember in the lazarette of the pressure reading.
6.
Loosen the locknut (5) on the port counterbalance valve (6) adjusting screw (7).
7.
If the pressure reading is 1000 lb/in (68.9 bar), turn OUT the adjusting screw (7) until the pressure drops below
1000 lb/in (68.9 bar).
8.
Slowly turn the adjusting screw (7) IN until the pressure reads 1000 lb/in (68.9 bar).
9.
When 1000 lb/in (68.9 bar) has been reached, tighten the locknut (5) snugly while holding the adjusting screw (7)
stationary.
0150 00-1
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