Warn Industries 75789, Original Instructions Manual

7

COMPRESSOR 

OPERATING INSTRUCTIONS

AIR CONNECTOR

AIR CONNECTOR

LEADS TO BATTERY

LEADS TO BATTERY

RELIEF 

VALVE

POWER SWITCH

RELIEF VALVE
LOCATED BEHIND COVER

POWER SWITCH

VTC

SPI

8

Operating the Compressor

1.  Connect compressor to battery. Follow electrical 

connections guidelines.

2.  Plug hose into compressor air connector. Use a 

hose rated for 180ûF (80ûC).

3.  Tool or accessory may be attached to end of 

air hose.

4.  Turn on air compressor by pressing top side of 

main the power switch. A red light will indicate 
that the unit is “ON”. The compressor will now 
run.

5. A tools or accessory may now be used.
6.  The pressure switch will automatically cycle the 

compressor on and off as air is used.

7.    Turn off air compressor by pressing bottom side
     of main the power switch. The compressor will
    stop running and the red light will go out.
8.    Always disconnect the compressor from battery  
     after  use.
9. Store compressor in a clean dry place.

INTERCOOLER

The intercooler provides a small air chamber that 
reduces the air temperature at the quick-connect 
fitting. There is a pressure switch and a relief valve 
mounted to the intercooler.

PRESSURE SWITCH

The pressure switch will automatically stop the 
compressor when it reaches the factory set “cut-
out” pressure of approximately 100 psi (670 kPa). 
When the pressure drops to the “cut-in” pressure of 
approximately 70 psi (480 kPa), the compressor will 
start up again.

RELIEF VALVE

If the pressure switch does not shut off the 
compressor at its “cut-out” pressure setting, the 
relief valve will protect against high pressure 
by “popping out” at approximately 125 psi (860 
kPa). The relief valve should be operated manually 
once a month to make sure it moves freely and is 
functional. Pull on the metal ring momentarily. 

DRAINING THE INTERCOOLER

It is normal for condensation to collect in the 
intercooler. This can be drained off at the relief 
valve by pulling on the metal ring. This should be 
done after every ten hours of usage or before any 
prolonged storage period. 

CLEANING

•  Do not wash the unit if it is hot to the touch.

•  Do not direct high pressure water at the unit. 

(pressure washers, car washes, etc.)

To prevent severe injury or death:

•  The compressed air stream can cause soft tissue 

damage to exposed skin and can propel dirt, 
chips, loose particles, and small objects at high 
speed, resulting in property damage or personal 
injury.

•  Always wear ANSI Z87.1 approved safety glasses 

with side shields when using the air compressor. 

•  Never point any nozzle or sprayer toward any 

part of the body or at other people or animals.

•  Always turn the compressor off and bleed 

pressure from the air hose and intercooler 
before attempting maintenance, attaching tools, 
or accessories.

W A R N I N G

C A U T I O N

To prevent minor or moderate injury:

• Never touch exposed metal, compressor 

head or head outlet tubes. 

• Never touch any exposed metal parts on 

compressor during or immediately after 
operation. Compressor will remain hot for 
several minutes after operation.

• Never reach around protective shrouds or 

attempt maintenance until unit has been 
allowed to cool.

COMPRESSOR 

OPERATING INSTRUCTIONS