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TM 5-4320-308-13
Table 3-1. Unit Preventive Maintenance Checks and Services - Continued
B - Before Operation
A - After Operation
M - Monthly
D - During Operation
W - Weekly
INTERVAL
ITEM TO BE INSPECTED
Equipment is
Item
PROCEDURE
Not Ready/
No.
B
D
A
W
M
Available If:
10
Air Filter Assembly.
Check for red band in window of restriction
Dirt in air filter
indicator (2).
blocks air flow
enough to cause
red band to
appear in window
of restriction
indicator.
Check rain hood (2) for damage that could prevent
Damage or block-
the replacement of air filter, allow dirt to enter air
age prevents air
flow after the air filter, cause restriction indicator
flow to engine
(2) to provide inaccurate readings, or obstruct air
and trips re-
flow to the engine.
striction indi-
cator.
3-12
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