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TM 10-4930-250-13&P
Section III. PREVENTIVEMAINTENANCE CHECKS AND SERVICES(PMCS)
4.4 GENERAL.
Preventive Maintenance Checks and Services (PMCS) involves systematic caring, inspection, and servicing of equipment to
keep it in good condition and prevent breakdowns. Table 4-1 lists the AAFARS System PMCS. Service intervals are divided
into categories: Before Operation; After Operation; and various other checks and services to be performed at prescribed
monthly interval. Table 4-1 organizes your PMCS tasks in chronological sequence. As the AAFARS operator, you should:
a.
Perform your PMCS as scheduled in table 4-1. Always do your PMCS in the same order, so it gets to be a
habit. Always assume explosive vapors are present at the AAFARS. Do not allow any smoking or spark
producing equipment within fifty feet of the AAFARS while performing your PMCS.
b.
Do your BEFORE PMCS prior to the equipment leaving its staging/service area or performing its intended
mission. Keep in mind the WARNINGS and CAUTIONS.
C.
Do your DURING PMCS during filter-separator liquid fuel operation. Leaks can be spotted only during
operation. Keep in mind the WARNINGS and CAUTIONS.
d.
Do your AFTER PMCS as soon as possible after the AAFARS has been taken out of its mission mode or
returned to its containment area. Keep in mind the WARNINGS and CAUTIONS.
WARNING
Do not operate AAFARS if there is any indication of fuel leakage.
e.
Cleanliness. Dirt, grease, oil and debris only get in the way and may cover up a serious problem. Use dry
cleaning solvent SD (P-D-680) or some other suitable cleaning solvent on all metal surfaces.
f.
Bolts, Nuts and Screws. Check bolts, nuts and screws for obvious looseness and missing, bent or broken
conditions. Look for chipped paint, bare metal or rust around bolt heads. If any part seems loose, tighten it.
9.
Welds. Look for loose or chipped paint, rust or gaps where parts are welded together. If a bad weld is found,
notify your supervisor.
h.
Electric Wires and Connections. Look for cracked or broken insulation, bare wires and loose connectors.
Tighten loose connectors and make sure bare wires are in a serviceable condition. If a bad wire or connector
is found, replace it or notify your supervisor.
4.5 LEAKAGE CRITERIA.
Wetness around seals, gaskets, fittings or connections indicates leakage. A stain also indicates leakage. If a fitting or
connector is loose, tighten it. If it is broken or defective, report it. Definitions of the classesof leaks are listed below.
Become familiar with each class of leak so that you are aware of the status of your equipment. When in doubt, notify your
supervisor.
4-3
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