TM 9-4110-258-13
Table 2-1. Operator Preventive Maintenance Checks and Services - Continued
Location
Item
Interval
Item to
Procedure
Not Fully Mission
No.
Check/
Capable If:
Service
6
Before
Pulleys
Inspect pulleys for cracks, chips, or warpage.
Pulleys are cracked,
Inspect for secure mounting to shaft. If damaged
chipped, warped, or loose
or loose, notify unit maintenance to tighten or
on shaft.
replace it as necessary.
7
Before
Fan Drive
Inspect fan drive shaft for cracks, chips, or
Fan drive shaft is cracked,
Shaft
warpage. If damaged, notify unit maintenance
chipped, or warped.
to replace it necessary.
Refrigeration
Unit Exterior
NOTE
The gauges must not be inspected
when the DEFROST IN PROGRESS or
HEATING CYCLE ON indicators are
on.
Pressures given are the acceptable
operating range.
8
During
Pressure Gauges
Inspect the (high) pressure gauge for reading
Gauge reading above or
between 165 and 250 psi (1138.5 and 1725 kPa)
below acceptable
and the (low) pressure gauge for reading between
operating range.
0 and 15 psi (0 and 103.5 kPa). If either gauge is
out of acceptable operating range on a continuous
basis, note the readings and shut down the
refrigeration unit. Notify unit maintenance of
the pressure readings.
NOTE
The thermometer must not be inspected
when the DEFROST IN PROGRESS
indicator is on.
9
During
Thermometer
Thermometer should indicate within 15F
Thermometer indicates
(7C ) of TEMPERATURE CONTROL setting. If
more than 15F (7C)
out of this range, shut down refrigeration unit
above or below
and notify unit maintenance.
TEMPERATURE
CONTROL setting.
2-9
