It is necessary to know how fluid leakage affects the status of fuel, oil, coolant, and the hydraulic systems. The following are
definitions of the different types/classes of leakage that determine the status of the vehicle. Learn, then be familiar with them,
and REMEMBER WHEN IN DOUBT, NOTIFY THE SUPERVISOR!
Equipment operation is allowable with minor leakage (Class I or II). Consideration must be given to
the fluid capacity in the item/system being checked/inspected. When in doubt, notify the supervisor.
When operating with Class I or II leaks, continue to check fluid levels as required in the PMCS.
Class III leaks should be reported to the supervisor or to Unit Maintenance. Failure to comply may
result in damage to equipment.
a. Class I. Seepage of fluid (as indicated by wetness or discoloration) not great enough to form drops.
b. Class II. Leakage of fluid great enough to form drops but not enough to cause drops to drip from item being
c. Class III. Leakage of fluid great enough to form drops that fall from the item being checked/inspected.
Table 3-1. Unit Level Preventive Maintenance Checks and Services (PMCS) for IHMEE.
Item to be
Not Fully Mission
PRIOR TO ROAD TEST
Supervise Operator/Crew in performing
Maintenance personnel will be with the
vehicle's operator to assist in performing
PMCS checks and verify preservice checks.
The following will be performed during the
road test. These inspections must be
performed before any Unit-level PMCS,
regardless of interval. For the road test, the
vehicle will be driven at least 5 mi. (8 km)
over different ground to give enough time
to detect any malfunctions.