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Model G0471 3 HP Air Compressor
-23-
The pressure switch has been factory set
for the highest PSI that is safe for this
compressor.
The pressure switch ensures the com-
pressor will shut OFF when the air tank
reaches maximum PSI.
Pressure Switch
Figure 20. Pressure adjustment screws.
5. Turn the black plastic pressure adjust-
ment screw (Figure 20) a half turn
clockwise to increase the maximum
tank pressure and a half turn counter-
clockwise to decrease the pressure.
NOTICE
This air compressor has been factory
set to turn ON and OFF at the proper
PSI range. Only attempt to adjust the
pressure regulator if your air com-
pressor does not reach, or pressur-
izes beyond the proper PSI level.
To adjust the pressure switch:
1. Unplug the air compressor from the
power supply.
2. Make sure the compressor switch is in
the OFF position.
3. Drain the pressure from the tank.
4. Remove the black AUTO/OFF switch
cover (Figure 19) by removing the
screw in the recess of the cover. Pull
the black cover up and set it aside.
Figure 19. Pressure switch cover.
6. Adjust the metal pressure adjustment
screw to change how low the pressure
can drop before the motor turns ON.
7. Connect the compressor to the power
supply and start the compressor. If
the compressor does not automati-
cally turn OFF at 120 PSI, flip the ON/
OFF switch to OFF before the pres-
sure reaches 125 PSI.
8. If the PSI level still needs adjustment,
repeat Steps 1–7.
9. Replace the cover when the proper
adjustments have been completed.
Maximum
Tank Pressure
Minimum Tank
Pressure