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TM 10-4930-250-13&P
Section II. OPERATOR'S PREVENTIVEMAINTENANCE
CHECKS AND SERVICES (PMCS)
2.1 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 2-3 lists the AAFARS PMCS. Service intervals are divided into
categories: Before Operation; During Operation; After Operation; and various other checks and services to be performed at
prescribed hourly intervals. Table 2-3 organizes your PMCS tasks in chronological sequence. As the AAFARS operator, you
should:
a.
Perform your PMCS as scheduled in table 2-3. 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 AAFARS 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 arm Keep in mind the WARNINGS and CAUTIONS.
e.
If your equipment fails to operate, perform the operator troubleshooting procedures presented in this manual.
Report unresolved maintenance problems to unit maintenance personnel.
f.
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.
g.
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 or
notify Unit Maintenance.
h.
Welds. Look for loose or chipped paint, rust or gaps where parts are welded together. If a bad weld is found,
notify Unit Maintenance.
i.
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, notify Unit Maintenance.
2.2 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 classes of leaks are listed below.
Be-comefamiliar with each class of leak so that you are aware of the status of your equipment. When in doubt, notify your
supervisor.
2-4
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