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TM 9-4120-389-14
Table 2-1. Operator Preventive Maintenance Checks and Services (Cont).
B-Before
D-During
A-After
W-Weekly
M-Monthly
Item
Item To Be Inspected
Equipment Is Not
No.
B
D
A
W
M
Procedure
Ready/Available
9
•
Refrigerant Sight Glass
After 15 minutes of
Bubbles, milky flow, or
operation in maximum,
yellow color is observed.
cooling, check for
bubbles or milky flow
indicating low refrig-
erant charge. Check
for yellow color which
indicates presence of
moisture.
2-14
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