TM 5-5420-280-10
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PREVENTIVE MAINTENANCE CHECKS AND SERVICES (Contd)
WARNING
The bleed valve on hydraulic line should be used to
bleed residual pressure from the line prior to
disconnecting. When disconnecting any hydraulic line,
open line slowly and protect face; hydraulic oil may
spray out due to residual pressure in system. Failure
to comply may result in serious injury to personnel.
d. Hydraulic lines. Look for wear, damage, and leaks. Ensure clamps and
fittings are tight. Wet spots and stains around a fitting or connector can
mean a leak. If a leak comes from a loose connector, notify field
maintenance. If a hydraulic component is leaking, notify field maintenance.
LEAKS
a. It is necessary to know how fluid leaks affect equipment operation and
readiness. The following definitions for types/classes of leakage shall be observed.
CAUTION
Equipment operation is allowable with minor leakage
(Class I or II) of any fluid except fuel. Of course,
consideration must be given to the fluid capacity in
the item being checked/inspected. When in doubt,
notify your supervisor.
When operating with Class I or II leaks, continue to
check fluid level more often than required in the
PMCS. Parts without fluid will stop working and/or
cause equipment damage.
Class III leaks should be reported to your supervisor
or field maintenance.
Class I
Seepage of fluid (as indicated by wetness or discoloration) not
great 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 fall from the
item being checked/inspected.
PAINTING
Paint touch-up of the REB should be performed as needed during PMCS. Notify
field maintenance.
END OF WORK PACKAGE
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