Craftsman 919.16780.CA Manual page 24

PROBLEM
Pressure reading
on the regulated
pressure gauge
(if equipped)
drops when an
accessory is
used.
Air leak from
safety valve.
Compressor is
not supplying
enough air to
operate
accessories.
Restricted air
intake.
Safety Valve on
pump "pops"
out.
D26625
CAUSE
It is normal for "some"
pressure drop to occur.
Possible defect in safety
valve.
Prolonged excessive use of
air.
Compressor is not large
enough for air requirement.
Hole in hose.
Check valve restricted.
Air leaks.
Restricted air intake filter
Loose belt.
Dirty air filter.
Pressure switch, check
valve, or pump could be
in need of servicing.
If there is an excessive amount
of pressure drop when the
accessory is used, adjust the
regulator as instructed in the
Operation section.
NOTE: Adjust the regulated
pressure under flow conditions
(while accesory is being used).
Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.
Decrease amount of air usage.
Check the accessory air
requirement. If it is higher than
the SCFM or pressure supplied
by your air compressor, you
need a larger compressor.
Check and replace if required.
Remove and clean, or replace.
Tighten fittings.
Clean or replace air intake
filter. Do not operate the air
compressor with the filter
removed. Refer to the "Air
Filter" paragraph in the
"Maintenance " section.
Check belt tension, see
Adjusting Belt Tension in the
Maintenance section.
Clean or replace. See Air Filter
paragraph in the Maintenance
section.
Have checked by a Trained
Service Technician.
24-ENG
CORRECTION