Craftsman 919.167631 Owner's Manual page 19

compressed air, or moving parts. Before servicing unit unplug or disconnect
electrical supply to the air compressor, bleed tank of pressure, and allow the air
compressor to cool.
PrOBLeM
Excessive
tank pressure
- safety valve
pops off.
Air leaks at fit-
tings.
Air leaks at or
inside check
valve.
Air leaks in air
tank or at air
tank welds.
Air leaks
between head
and valve plate.
Pressure read-
ing on the regu-
lated pressure
gauge drops
when an acces-
sory is used.
TROUBLESHOOTING
Risk of Unsafe Operation. Unit cycles automatically when power
is on. When servicing, you may be exposed to voltage sources,
CAUSE
Pressure switch does not
shut off motor when
compressor reaches
"cut-out" pressure.
Pressure switch "cut-out"
too high.
Tube fittings are not tight
enough.
Check valve seat damaged.
Defective air tank.
Leaking seal.
It is normal for "some"
pressure drop to occur.
CORRECTION
Move Auto/Off lever to the
"Off" position, if the outfit
does not shut off contact a
Trained Service Technician.
Contact a Trained Service
Technician.
Tighten fittings where air can
be heard escaping. Check
fittings with soapy water solu-
tion. Do Not Overtighten.
Replace check valve. Refer to
the To Replace Check Valve
in the Service and Adjustment
section.
Air tank must be replaced. Do
not repair the leak.
Do not drill into, weld or
otherwise modify air tank or
it will weaken. The tank can
rupture or explode.
Contact a Trained Service
Technician.
If there is an excessive
amount of pressure drop when
the accessory is used, adjust
the regulator following the
instructions in the Description
of Operation paragraph in the
Operation section.
NOTE: Adjust the regulated
pressure under flow condi-
tions (while accessory is being
used).
19 - ENG
Risk of
Bursting