TM 9-4120-399-14
Table 4-2. Unit Preventive Maintenance Checks and Services (PMCS). - Continued.
Interval
Item To Be
Item
Procedure
Inspected
No.
Remove top panel per para. 3-4.
9
Impeller Fans
Inspect evaporator fans for bent or loose
blades.
Check that fans are not rubbing against
fan scrolls.
Remove top panel per para. 3-4.
10
Scrolls
Inspect scrolls for dents, cracks, or bent
metal.
Check for loose or missing mounting
hardware.
Remove top panel per para. 3-4.
11
Fan Motor
Check motor for loose, broken or cut
and Bracket
motor leads and connections.
Check for smooth rotation of motor.
Check for loose or missing mounting
hardware.
Inspect for bent motor shafts.
Check that fresh air damper operates
Fresh Air
12
without binding.
Damper
Check that damper door opens and
closes properly.
Remove front panel per para. 3-4.
Junction Box
13
Assembly
Inspect junction box for loose or missing
mounting hardware.
Check that all connectors are in place
and tight.
4-20
