TM 10-3510-209-24
2-24. AIR COMPRESSOR (CONT)
ADJUSTMENT
1.
Turn on electrical power to air compressor.
WARNING
This adjustment is performed with
power on. Proceed with extreme
caution. Follow steps carefully.
Death or serious injury could result.
2.
Loosen captive acorn nut (5) and remove
pressure switch cover (6).
3.
Open bleeder valve (7) on bottom of air tank (8).
Release air until compressor turns on. Note
pressure on pressure gage (9). Close bleeder
valve.
4.
Watch pressure gage (9) on air tank (8) and
note the pressure that the compressor cuts off.
NOTE
The pressure switch has a differential
of
20
psi
(138
kPa)
between
compressor
cut-on
and
cutoff.
Adjustment of nut (10) changes the
cutoff pressure. Tightening the nut
(clockwise)
increases
cutoff
pressure.
Loosening
the
nut
(counterclockwise)
reduces
cutoff
pressure.
5.
Make a one-quarter turn of nut (10) to increase
or decrease cutoff pressure.
6.
Repeat steps 3 thru 5 until the compressor cut-
on/cutoff range is reached: ON-60 psi (414 kPa); OFF-
80 psi (552 kPa).
7.
Install pressure switch cover (6), tighten captive
acorn nut (5), and turn off power to compressor.
Change 1 2-91
