TM 9-4110-254-14
Table 2-1. Operator Preventive Maintenance Checks and Services - Continued
Location
Item
Interval
Item to Check/
Procedure
Not Fully Mission
No
Service
Capable If:
Inspect pulleys for cracks, chips, or warpage.
4
Before
Pulleys
Pulleys are cracked,
Inspect for secure mounting to shaft If damaged or
chipped, warped, or loose
loose, notify unit maintenance to tighten or replace
on shaft.
it as necessary.
5
Before
Fan Drive Shaft
Inspect fan drive shaft for cracks, chips, or
Fan drive shaft is cracked,
warpage. If damaged, notify unit maintenance to
chipped, or warped.
replace it as necessary.
Refrigeration
Unit Exterior
NOTE
The gages must not be inspected when the
DEFROST IN PROGRESS indicator is on.
Pressures given are the acceptable
operating range.
Inspect the (high) pressure gage for reading
6
During
Pressure Gages
Gage reading above or
between 160 and 270 psi (1104 and 1863 kPa) and
below acceptable operating
the (low) compound gage for reading between 0 and
range.
15 psi (0 and 104 kPa). If either gage 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.
Thermometer should indicate within 15F (7C ) of
7
During
Thermometer
Thermometer indicates
TEMPERATURE CONTROL setting. If out of this
more than 15F (7C)
range, shut down refrigeration unit and notify unit
above or below
maintenance.
TEMPERATURE
CONTROL setting.
2-9
