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TM 10-4320-348-14
(7)
When you do your PMCS, you will always need a rag or two. The following items are common to all of the
pumping assembly components.
(a)
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 (Appendix E, Item 5) on all metal
surfaces. Use soap (Appendix E, Item 8) when you clean rubber or plastic material.
(b)
Rust and Corrosion. Check the components of the pumping assembly for rust and corrosion. If any
bare metal or corrosion exists, clean and apply a thin coat of oil. (Appendix E, Item 4). Report it to
your supervisor.
(c)
Bolts, Nuts and Screws. Check them 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.
(d)
Welds. Look for loose or chipped paint, rust, or gaps where metal parts are welded together. If you
find a bad weld, report it to your supervisor.
(e)
Hoses. Look for wear, damage, or leaks and make sure clamps and fittings are tight. Wet spots
show obvious 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.
(8)
When you check for "proper operating condition", you look at the component to see if its serviceable.
c.
Special Instructions. If the equipment must be kept in continuous operation, check and service only those items
that can be checked and services without disturbing operation. Make the complete checks and services when the
equipment can be shut down.
d.
Leakage Definitions for Operator PMCS. It is necessary for you to know how fluid leakage affects the status of the
pumping assembly. Following are types and classes of leakage an operator needs to know to be able to
determine the status of the pumping assembly. Learn these leakage definitions and remember when in doubt,
notify your supervisor.
CAUTION
•
Equipment operation is allowable with minor leakage (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 by your
PMCS.
•
Class III leaks should be reported immediately to your supervisor.
(1)
Class I. Seepage of fluid (as indicated by wetness or discoloration) not great enough to form drops.
(2)
Class II. Leakage of fluid great enough to form drops but not enough to cause drops to drip from item being
checked/inspected.
(3)
Class lII. Leakage of fluid great enough to cause drops to drip from item being checked/inspected.
2.4 OPERATOR PMCS TABLE. The Operator PMCS information is shown in Table 2-1.
2-6
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