TM 9-4120-402-14
Table 4-2. Unit Preventive Maintenance Checks and Services (PMCS)
Quarterly Schedule - continued
Item
Item to be
Procedures
Paragraph
Number
Inspected/Serviced
Reference
9
Condensate Drip Pan, Drain
a.
Wipe any dust or dirt out of the condensate drip pan (17)
Tubes, and Drain Traps
b.
Pour about one cup of clean fresh water into the
condensate drip pan (17) and watch for it to flow through
the drain traps (18) at the bottom end of the drain tubes.
c.
If the water does not flow through the traps, or if the
discharged water has a muddy appearance, remove the
cotter pin (19), spring (20), and ball (21) from the bottom
end of the drain tubes and thoroughly flush the tubes. If
the tubes are clogged, insert a flexible wire from either
the top or bottom end and agitate until the clog is
removed. Pour additional water in the drip pan until an
unrestricted flow of clean water is achieved. Check that
ball (21) and spring (20) are clean and in good condition.
Reinstall the ball (21), spring (20), and cotter pin (19) in
drain traps.
4-28
TM 9-4120-402-14