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 TM 55-1905-242-14
OPERATOR, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
MAINTENANCE INSTRUCTIONS
PMCS INTRODUCTION
GENERAL
Preventive Maintenance Checks and Services (PMCS) are performed to keep the vessel in operating condition. The checks
are used to find, correct, or report problems. Crew members are to do the PMCS jobs as shown in WP 0053 00. Unit
maintenance members are to do the PMCS as shown in WP 0054 00. PMCS is done every day the vessel is operated, using
the appropriate PMCS work packages. Pay attention to WARNING and CAUTION statements. A WARNING means some-
one could be hurt. A CAUTION means equipment could be damaged.
Before operating vessel equipment, do Before PMCS.
During operation, do During PMCS.
After operation, do After PMCS.
Once a week do Weekly PMCS. If vessel has not been operated in a week, also do Before PMCS at the same time as Weekly
PMCS.
Do Monthly PMCS once a month. If vessel has not been operated in a month, also do After PMCS at the same time as
Monthly PMCS.
If the vessel is being operated for the first time, do the Weekly and Monthly PMCS at the same time that the Before PMCS
is performed.
If a deficiency is noted when performing PMCS, fix it, if possible, using troubleshooting procedures and/or maintenance
procedures. If the deficiency cannot be corrected, write up the items not fixed on DA Form 2404 for unit maintenance. For
further information on how to use this form, see DA PAM 738-750.
The right hand column of the PMCS table lists conditions that make the vessel not fully mission capable. Write up items not
fixed on DA Form 2404 for unit maintenance. For further information on how to use this form, see DA PAM 738-750.
If tools required to perform PMCS are not listed in WP 0227 00, notify unit maintenance.
LEAKAGE DEFINITION
! CAUTION
Equipment operation is allowable with minor leakages (Class I or 11) except for fuel
leaks. Of course, consideration must be given to the fluid capacity of the item or system
being checked. When in doubt, ask your supervisor.
When operating with Class I or 11 leaks, continue to check fluid levels as required in your PMCS.
Class III leaks should be reported immediately to your supervisor.
It is necessary to know how fluid leakage affects the status of the vessel. The following are definitions of the classes of
leakage an operator or crew member needs to know to be able to determine the condition of the leak. Learn and then be
familiar with them, and REMEMBER: WHEN IN DOUBT, ASK YOUR SUPERVISOR.
Leakage Definitions for Crew/Operator PMCS.
CLASS I - Seepage of fluid (as indicated by wetness or discoloration) not great enough to form drops.
CLASS II - Leakage of fluid great enough to form drops but not enough to cause drops to drip from item being checked.
CLASS III - Leakage of fluid great enough to form drops that fall from the item being checked.
0052 00-1
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