TM 55-2210-224-12
2-5. PMCS PROCEDURES (cont)
(3)
Check bolts, nuts, and screws for obvious looseness or missing, bent, or broken
condition. Do not try them all with a tool, but look for chipped paint, bare metal, or rust
around bolt head. If you find one loose, report it to unit maintenance.
(4)
Look for loose or chipped paint, rust, or gaps where parts are welded together. If a bad
weld is found, report it to unit maintenance.
(5)
Check electrical wires and connectors for cracked, burned, or broken insulation, bare
wires, and loose or broken connectors.
(6)
Check hoses and fluid lines for wear, damage, and leaks. Make sure clamps and fittings
are tight. Wet spots show leaks, but a stain around a fitting or connector can 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 unit maintenance.
2-6. SPECIAL INSTRUCTIONS (PMCS)
It is necessary for you to know how fluid leakage affects the status of equipment. The following are
definitions of the types/classes of leakage to help determine the status of locomotive parts. Learn
them and be familiar with each type of leak. Remember when in doubt notify unit maintenance.
Leakage definitions:
WARNING
Water, if allowed to enter electrical equipment, can cause death or serious
injury to personnel and/or damage to generators, motors, and switches.
CAUTION
•
Equipment operation is allowed with minor leakage (Class I or II).
Consideration must be given to the fluid capacity of the item being
checked/inspected. When in doubt, notify unit maintenance.
•
When operating with class I or II leaks, increase the frequency of fluid level
checks in excess to that required in PMCS. Parts without fluid will stop
working and/or cause damage to the parts.
CLASS I - Seepage of fluid (as indicated by wetness or discoloration) not enough to form drops.
CLASS II - Leakage of fluid great enough to form drops but not enough to cause drops to drip from
item being checked/inspected.
CLASS III - Leakage of fluid great enough to form drops that drip from the item being
checked/inspected.
2-17
