TM 10-4130-237-14
g. When you do your PMCS, you will always need a rag or two. Following are checks that are common to the entire
water chiller:
(1)
(2)
(3)
(4)
(5)
(6)
Keep It Clean. Dirt, grease, oil, and debris only get in the way and may cover up a serious problem. Clean as you
work and as needed. Use dry cleaning solvent (SD–2) on all metal surfaces. Use soap and water when you clean
rubber or plastic material. Upholstery can be cleaned with soap and water and a clean, damp cloth.
Rust and Corrosion. Check water chiller and frame for rust and corrosion. If any bare metal or corrosion exists,
clean, and apply a thin coat of oil. Report it to your supervisor.
Bolts, Nuts, and Screws. Check them all for obvious looseness, missing, bent, or broken condition. You can’t try
them all with a tool, but look for chipped paint, bare metal, or rust around bolt heads. If you find a bolt, nut, or
screw you think is loose, tighten it or report it to your supervisor.
Welds. Look for loose or chipped paint, rust, or gaps where parts are welded together. If you find a bad weld,
report it to your supervisor.
Electric Wires and Connectors. Look for cracked, frayed, or broken insulation, bare wires, and loose or broken
connectors. Tighten loose connectors. Report any damaged wires to your supervisor.
Hoses and Fluid Lines. Look for wear, damage, and leaks, and 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 fitting or
connector, tighten it. If something is broken or worn out, report it to your supervisor.
h.
When you check for “operating condition,” you look at the component to see if it’s serviceable.
2-4.
LEAKAGE DEFINITIONS FOR OPERATOR PMCS
It is necessary for you to know how fluid leakage affects the status of the water chiller. Following are types/classes of
leakage an operator needs to know to be able to determine the status of the water chiller. Learn these leakage definitions
and remember – when in doubt, notify your supervisor.
CAUTION
Equipment operation is allowable with minor leakages (Class I or II). Of course, consideration
must be given to fluid capacity in the item/system being checked/inspected. When in doubt,
notify your supervisor.
When operating with Class I or II leaks, continue to check fluid levels as required in your
PMCS.
Class III leaks should be reported immediately to your supervisor.
a.
CLASS I - Seepage of fluid (as indicated by wetness or discoloration) not great enough to form drops.
b.
CLASS II- Leakage of fluid great enough to form drops but not enough to cause drops to drip from item being
checked/inspected.
c.
CLASS III- Leakage of fluid great enough to form drops that fall from item being checked/inspected.
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