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1. Replace pressure switch if it does not release
air pressure briefly when unit shuts off.
Do not remove pressure
switch with air pressure in
tank
1. Make sure unit is mounted on a level surface
with vibration pads.
2. Replace belts. Align and tighten properly.
3. Align flywheel and drive pulley.
1. Reduce air demand or use a compressor
with more air capacity.
2. Clean all cooling surfaces of dirt and dust.
3. Install compressor in an area with adequate
cool dry air.
1. Malfunctioning check valve
Overheating
TROUBLESHOOTING GUIDE (Continued)
Pressure switch un-
loader constantly
leaking air
1. Replace check valve if unloader bleeds
constantly.
Do not remove check valve
with air pressure in tank
!
DANGER
Pressure switch not
unloading
1. Malfunctioning pressure
switch
!
DANGER
Excessive vibration
1. Compressor too small for
application
2. Cooling surfaces dirty
3. Improper cooling
1. Improper installation
2. Loose belts
3. Misaligned flywheel or
drive pulley
