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 TM 55-1905-242-14
DIRECT SUPPORT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
STEERING HELM UNIT, REPLACE
INITIAL SETUP:
Tools and Special Tools:
Personnel Required:
Tool Kit, Mechanic's Rail and Marine (Item 1,
Two Watercraft Engineers, 88L
Table 1, WP 0230 00)
Wrench, Torque, 1/2 in. Drive, 0-200 lb-ft
Materials/Parts:
(Item 12, Table 1, WP 0230 00)
Hydraulic Fluid (Item 1, Table 2, WP 0230 00)
Suitable Drain Pan
References:
Equipment Condition:
FM 55-502
Propulsion engines secured, locked out, and
TM 55-1905-242-24P (WP 0079)
tagged out IAW FM 55-502
Access panel below helm removed
REMOVAL
WARNING
Do not allow hydraulic fluid or cleaning solvent to come in contact with unprotected
skin or eyes. Prolonged skin contact can cause illness or injury. Eye contact can cause
serious injury. Always wear chemical protective gloves and goggles when handling
used hydraulic fluid and cleaning solvent. Failure to comply can result in illness, seri-
ous injury, or death.
Hydraulic hoses and lines may be under pressure. Relieve pressure by operating the
appropriate control valve if possible. Loosen fittings on hose lines slowly. Allow oil to
run around threads of fitting, releasing pressure before disconnecting fitting. Releasing
pressurized oil suddenly may cause serious injury or death.
1.
Don chemical protective gloves and goggles and position a suitable drain pan beneath the helm unit (5).
2.
Remove the nut (1) that secures the helm (2) to the steering column (3). Remove the helm and key (4).
3.
Loosen, but do not remove, the four hydraulic hoses (6) at the helm unit (5) to permit any residual hydraulic pressure or
fluid to drain from the system.
4.
Label and remove the four hydraulic hoses (6) from the helm unit (5). Cap the open ends of the hoses to prevent
contamination of the system.
5.
With one crewmember holding the steering column (3) and the other holding the helm unit (5), remove the bolts (7) that
secure the steering column and helm unit to the console. Remove the steering column and the helm unit.
0179 00-1
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