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Speedaire Operating Instructions and Parts Manual
5Z598C
Excessive tank pressure – safety valve
pops off
Air leaks at fittings
Air leaks at check valve
Air leaks at pressure switch release valve
Air leaks from air tank
1. Move the pressure switch lever to the
OFF position. If the outfit doesn'tshut
off, and the electrical contacts are
welded together, replace the pressure
switch If the contacts are good, check
to seeif the pin in the bottom of the
pressure release valve is stuck. If it does
not move freely, replace the valve
2. Return the outfit to a Service Center to
check and adjust, or replace switch
Tighten fittings where air can be heard
escaping. Check fittings with soapy
water solution. DO NOT OVER-TIGHTEN
Defective check valve results in a constant
air leak at the pressure release valve when
there is pressure in the tank and the
compressor is shut off. Remove and clean
or replace check valve. DO NOT OVER-
TIGHTEN
1. Remove and replace the release valve
2. A defective CHECK valve results in a
constant air leak at the pressure release
valve when there is pressure in the tank
and the compressor is shutoff. Remove
and clean or replace check valve. DO
NOT OVER-TIGHTEN
Air tank must be replaced. Do not repair
the leak
DO NOT DRILL INTO,
WELD, OR OTHERWISE
MODIFY AIR TANK OR IT WILL WEAKEN
Performing repairs may expose voltage sources, moving parts, or compressed air sources.
Personal injury may occur. Prior to attempting any repairs unplug the power cord and bleed off
air pressure.
Corrective Action
Symptom
Troubleshooting Chart
1. Pressure switch does not shut off motor
when compressor reaches "cut-out"
pressure
2. Pressure switch "cut-out" too high
Fittings are not tight enough
Defective or dirty check valve
1. Defective pressure switch valve
2. Defective check valve
Defective air tank
Possible Causes
Clean or replace regulator
If there is an excessive amount of pressure
drop when the accessory is used, adjust the
regulator
NOTE: Adjust the regulated pressure under
flow conditions (while accessory is being
used)
Dirty or damaged regulator internal parts
It is normal for "some" pressure drop to
occur
Regulator knob – continuous air leak
Regulator will not shut-off air outlet
Pressure reading on the regulated
pressure gauge drops when an accessory
is used
Speedaire Portable Air Compressor
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