TM 5-3820-256-10
Figure 2-3 . Air Compressor Controls and Indicators (Sheet 2 of 2)
CONTROL or
KEY
INDICATOR
FUNCTION
5
Air/oil temperature
Indicates compressor air/oil mixture temperature.
switchgage
Stops compressor operation if temperature
exceeds 230 deq. F.
6
Air compressor intake
Indicates compressor suction air vacuum. If
air switchgage
vacuum reaches 15" W.C., stops compressor
operation.
7
Injection oil temperature
Indicates oil temperature being injected into
switchgage
compressor. Stops compressor when tempera-
ture reaches 180 deq F.
8
Low oil pressure switchgage
Indicates oil pressure injected into compressor.
Stops compressor when oil pressure falls to
5 psi.
9
Air pressure switchgage
Indicates pressure in clutch air supply system.
When pressure falls to 40 psi, it shuts down
compressor or mud pump.
10
Compressor reset button
When low air pressure shuts down compressor,
button pops out to indicate problem. Must
be pushed in after problem is corrected.
11
ON-OFF power switch
Turns power to compressor panel on and off.
12
Cooling fan adjust valve
Regulates oil flow to cooling fan motor. CCW
increases motor speed; CW reduces speed.
13
Compressor oil inject
Regulates amount of cooling oil injected into
throttle valve
compressor during operation. CCW increases
the amount of flow; CW decreases flow.
14 &
Air pressure gages
Shows pressure differential before and after
15
coalescent filter. 10 psi difference indicates
filter needs change.
16
Oil level indicator
Sight glass indicates the level of injection oil
in the compressor system.
17
Oil Temperature gage
Indicates temperature of oil in air/oil separator.
2-4
