TM 9-4120-405-13&P
2-5. LEAKAGE TEST. It is necessary for you to know how fluid leakage affects the status of your equipment. The
following definitions of the types/classes of leakage you need to know to be able to determine the status of your
equipment. Learn, then be familiar with them and REMEMBER WHEN IN DOUBT, NOTIFY YOUR SUPERVISOR.
Leakage Definitions:
Class I
Seepage of fluid (as indicated by wetness or discolor ation) not great
enough to form drops.
Class II
Leakage of fluid great enough to form drops but not enough to cause
drops to drop from item being checked/inspected.
Class III
Leakage of fluid great enough to form drops that fall from the item being
checked/inspected.
Table 2-1. Operator Preventive Maintenance Checks and Services
B - BEFORE
D - DURING
A - AFTER
W - WEEKLY
M - MONTHLY
Procedures:
Interval
Check for and have
Equipment is
Item
Item to be
repaired, filled or adjusted
Not Ready/
No.
B D A WM
Inspected
as needed
Available If:
AIR CONDITIONER
1
Information Plates
Check for legibility and loose or
missing hardware.
2
Fabric Cover
Check that cover is rolled up for
normal operation.
Roll down cover and check for
Cover is missing or dam-
condition of snaps, mildew, tears,
aged.
or worn edges.
3
Panels
Check for cracks, dents, or missing
Panels missing or dam-
hardware.
aged.
4
Air Filter
Check that filter is clean.
Filter is clogged or missing.
5
Vent Control
Check for proper adjustment.
Should be in closed position.
Freedom of operation.
Control wheel missing or
inoperable.
6
Condensate Drain
No water dripping anywhere
Water is leaking in an
except drain.
area that would cause
damage or be a hazard.
2-6
