2-4. INTRODUCTION TO PMCS TABLE-Continued.
Loose. Damaged, or Missing Bolts, Nuts, and Screws. Check for obvious looseness or damaged
condition. Without using a wrench, it may be difficult to spot loose hardware. However, you can often
identify loose bolts by chipped or missing paint around the bolt head and bare metal at the base of the bolt
head. If you find a loose bolt, tighten it. If a bolt is missing, or a damaged bolt, nut, or screw is
discovered, report it to unit maintenance.
Fluid Leaks. Look for wear, damage, and leaks under fluid hoses, lines, and fittings. Ensure fittings and
clamps are tight. Wet spots indicate leaks but stains around a fitting can mean a leak too. If a leak comes
from a loose fitting or connector, tighten the connection. If a hose, fitting, or connector is broken or worn
out, report it to unit maintenance.
It is necessary for you to know how fluid leakage affects your equipment. The following classification
system defines the three types of leaks you may encounter while doing PMCS. Become familiar with the
system so that you can determine the readiness/availability of your hydraulic impact wrench.
Class I leak-Seepage of fluid (indicated by wetness or discoloration) not great enough to form drops.
Class II leak-Leakage of fluid great enough to form drops, but not enough to cause drops to drip from the
item being checked/inspected.
Class IlIl leak-Leakage of fluid great enough to form drops that fall from the item being checked/inspected.
Equipment operation is allowable with minor leakage (class I
or class II). Of course, consideration must be given to fluid
capacity in item/system being checked/inspected. When in
doubt, notify your supervisor. When operating with class I or
class II leaks, continue to check fluid levels as required in
your PMCS to prevent damage to equipment.
Class Ill leaks should be reported to your supervisor or unit
Table 2-1. OPERATOR PMCS.
Inspect hydraulic impact wrench (1) for cracks
Cracks or broken
or breaks in casting.
casting or winch
Inspect hydraulic impact wrench (1) for
Any class Ill leak.
evidence of leakage.
Check for smooth, unrestricted operation of
Trigger will not
on/off trigger (2).