5
preset cut-out pressure. The pilot valve opens, actuating the unloading
device that allows the compressor to run in an unloaded mode. When
the tank pressure drops to the preset cut-in pressure,
the pilot valve closes allowing the unloading device to
close and the compressor once again pumps into the
t a n k s .
Manual Lock:
The manual lock allows you to manually unload the
compressor with air pressure in the tank. To operate the
unloading device in the head, rotate the flip lever to an
in-line position (dashed lines). Be sure to return lever to
the loaded position after starting the engine or the pump
will not operate at preset pressures.
SAFETY RELIEF VALVE:
This valve (A) is designed to prevent system failures by relieving
pressure from the system when the
compressed air reaches a predetermined
level. The valve is preset by the manu-
facturer and must not be removed or
modified in any way.
AIR INTAKE FILTER(S):
The filter(s) (B) are designed to clean air entering
the pump. To ensure the pump continually
receives a clean, cool, and dry air supply the
filter(s) must always be clean and the filter intake
must be free from obstructions.
AIR TANK DRAIN VALVE(S):
The drain valve(s) (C) are used to remove
moisture from the air tank after the air compressor
is shutoff .
TANK PRESSURE GAUGE:
The tank pressure gauge (D) indicates air pressure in the air tank.
REGULATED PRESSURE GAUGE:
The regulated pressure gauge (E) indicates the air pressure available
at the outlet side of the regulator. This pressure is controlled by the
regulator and is always less or equal to the air tank pressure.
PRESSURE REGULATOR:
The regulator knob (F) controls the air pressure coming from the air
t a n k .
PILOT VALVE CUT-OUT PRESSURE ADJUSTMENT
N O T E : Unit can remain running while performing this adjustment
WARNING : A f t e r c o o l e r, pump head, and surrounding parts are
very hot; do not touch. (see the Hot Surfaces identified on page 2)
WARNING - Moving Parts: Keep your hair, clothing and gloves
away from moving parts. Loose clothing, jewelry, or long hair can be
caught in moving parts. Air vents may cover moving parts and should
be avoided as well. Do not remove the protective covers from this
p r o d u c t .
WARNING : The pilot valve is brass which is a soft metal. Do not
overtighten screw as threads can strip out.
1. Hold “I” firmly and loosen nut “H”.
WARNING : Do not loosen screw
“G” more than 1 revolution as screw
is subjected to tank pressure and can
burst out which can harm the user or
surrounding personnel.
2 . Turn screw “G” clockwise to
increase cut-out pressure limit or counter clockwise to decrease cut-
out pressure. (example: if the cut-out pressure on the tank gauge
reads 120 psi. and desired cut out is 130 psi, turn screw “G”
c l o c k w i s e )
3 . Drain air from tanks through drain valves until pump begins to
charge tanks.
4 . Close drain valves.
5 . Monitor cut-out pressure to verify the new setting
C
D
E
F
G H I J
A
B
Gas Manual 10-5-01 2/10/03 2:31 PM Page 5
