TM 9-2320-360-10
2-5. GENERAL MAINTENANCE PROCEDURES (CONT)
e. Hydraulic Lines and Fittings. Look for wear, damage, and leaks; ensure clamps and fittings are
tight. Wet spots show leaks. 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.
f. Damage. Damage is defined as any condition that affects safety or would make the HET Tractor
unserviceable for mission requirements.
2-6. FLUID LEAKAGE
It is necessary to know how fluid leakage affects the status of fuel, oil, coolant, and hydraulic systems.
The following are definitions of the different types of leakage that can determine the status of the HET
Tractor. Learn, then be familiar with them and REMEMBER - WHEN IN DOUBT NOTIFY YOUR
SUPERVISOR!
CAUTION
Equipment operation is allowable with minor leakage (Class I or
Class II). Consideration must be given to the fluid capacity in
the item/system being checked/inspected. When in doubt,
notify your supervisor.
Class Ill leaks should be reported to the supervisor or to unit
maintenance.
Fluid leakage is classified and defined as follows:
Classification
Identification
Class I -
Seepage of fluid (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 fall
from item being checked/inspected.
Class Ill -
Leakage of fluid great enough to cause drops to fall from item being
checked/inspected.
2-7. PMCS TABLE
Refer to table 2-1 for operator/crew PMCS procedures for the HET Tractor. Perform your PMCS (Before,
During, After, or Weekly) starting with the left front of the HET Tractor and continuing counterclockwise
around the NET Tractor.
NOTE
If leakage is detected, further investigation is needed to determine
the location and cause.
If there is any doubt, contact your
supervisor or unit maintenance.
When operating with Class I or Class II leaks, continue to check fluid levels as required in the PMCS.
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