TM 5-4310-384-13
Table 3-2. Unit Preventive Maintenance Checks and Services (Continued).
W - Weekly
M - Monthly
Q - Quarterly
Semi-Annually
Item
Interval
No.
W
M
Q
S
Item to Be Inspected. Procedures
WARNING
Extreme caution must be exercised when circuits have been
energized. Contact with line circuits can cause severe personal
injury or death.
c. With power on and ON/OFF switch on, observe motor starter while
compressor cycles. Magnetic contact arm (3) should open and
Close (contact base) with operation of pressure switch.
d. Check mounting of thermostat and check capillary tube and leads
to regulator/filter for secure mounting.
2
PRESSURE SWITCH
a. Inspect pressure switch fitting (1) at tank for air leaks.
b. Turn power off and ON/OFF switch off. Check wire connections
at screw terminals (2) for secure attachment.
c. With power on and ON/OFF switch on, check operation of pressure
switch (3) by observing pressure gage on air receiver.
Pressure switch should engage starter at 160 psi and stop starter
at 190 psi.
3-6
