TM 9-4310-397-142-3. INTRODUCTIONTOPMCSTABLE.(6)When you do your PMCS, you will always need a rag or two. Following are checks that are common to theentire air compressor.(a)Keep it clean. Wipe faces of gauges with clean, lint-free cloth.(b)Check frame for rust and corrosion. If any bare metal or corrosion exists, clean and apply a thin coatof oil. Use MIL-L-2104, or equivalent.(c)Check for obvious looseness, or missing, bent, broken bolts, nuts, and screws. If you find a bolt, nut,or screw you think is loose, tighten it or report it to your supervisor.(d)Check for cracked, frayed or broken insulation, bare wires and loose or broken connectors. Tightenloose connectors. Report any damage to your supervisor.(e)Look for wear, damage, and leaks on hoses and fluid lines. Make sure clamps and fittings are tight. Wet spots show leaks, but a stain around a fitting or connector can also mean a leak. If a leak comes from a loose fittingor connector, tighten it. If something is broken or worn out, report it your supervisor.(f)When you check for "operating condition," you look at the component to see if it is serviceable.NOTEOnly use those authorized solvents or agents listed in appendix E.(g)Clean all metal parts with solvent. Wipe nonmetallic parts, with a clean lint-free cloth moistenedslightly with solvent and air dry thoroughly.(7)Leakage Definition for Operator PMCS. It is necessary for you to know how fluid leakage affects the statusof your air compressor. The following are types/classes of leakage an operator needs to know to be able to determinethe status of their unit. When in doubt notify your supervisor.CAUTION·Equipment will not be operated with an obvious fuel leak.·Equipment operation is allowable with minor leakages (class I or II). Consideration must begiven to fluid capacity in the item/system being checked/inspected.·When operating with class I or II leaks continue to check fluid levels as required in yourPMCS.·Class III leaks should be reported immediately to your supervisor.(a)Class I is defined as seepage of fluid as indicated by wetness or discoloration but not great enoughto form drops.(b)Class II is defined as leakage of fluid great enough to form drops but not enough to cause drops todrip from item being checked/inspected.(c)Class III is defined as leakage of fluid great enough to form drops that fall from item beingchecked/inspected.2-6
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