TM 9-2320-366-10-1
2-16. GENERAL MAINTENANCE INSTRUCTIONS (CONT)
e. Hydraulic Lines and Fittings. Look for wear, damage, and leaks; make sure clamps
and fittings are tight. Wet spots show leaks. 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, notify Unit Maintenance.
f. Damage. Damage is defined as any condition that affects safety or would make the
vehicle unserviceable for mission requirements.
2-17. 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 vehicle. Learn, then be familiar with them, and REMEMBER-
WHEN IN DOUBT, NOTIFY UNIT MAINTENANCE!
CAUTION
• Equipment operation is allowable with minor leakage (Class I or Class II).
Fluid levels of items with Class I and Class II leaks must be checked often
so proper levels can be kept. Consideration must be given to the fluid
capacity in the item/system being checked/inspected. Failure to comply may
result in damage to equipment.
• Class III leaks must be reported to Unit Maintenance. Failure to comply may
result in damage to equipment.
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 drip from
item being inspected.
Class III
Leakage of fluid great enough to cause drops
to drip from item being checked.
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