Craftsman 919.176730 Owner's Manual page 12

TROUBLESHOOTING GUIDE (continued)
PROBLEM CAUSE CORRECTION
Air leaks at check valve Defective or dirty check valve. A defective check valve results in a constant air
teak at the pressure reiease valve when there is
pressure in the tank and the compressor is shut off.
Remove and clean, OFreplace check valve. DO
NOT OVER-TiGHTEN.
Air leaks at pressure Defective pressure switch Remove and replace the release valve.
switch release valve release valve.
Air leaks in air tank
Defective check valve.
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 shut off.
Remove and clean, or replace check valve. DO
NOT OVER-TIGHTEN.
Defective air tank.
Air tank must be replaced. Do not repair the leak.
DO NOT DRILL mNTO, WELD, OR OTHER-
W_SE MODIFY AIR TANK OR mT WILL
WEAKEN.
Air leaks from safety valve Possible defect in safety valve Operate safety valve manually by pulling on ring. ff
valve still leaks, it should be replaced.
Regulator knob - continu- Dirty or damaged regulator inter- Clean or replace regulator, or internal parts.
ous air leak. Regulator will nat parts.
not shut-off at air outlet.
Knocking noise Defective check valve. Remove and clean, or replace.
Loose pulley.
Tighten pulley set screw, (70-80 In.-Lbs.).
Low oil level.
Maintain prescribed oil level. Add oil
Loose flywheel.
Tighten screw. 15 to 20 ft. lbs.
Loose compressor mounting
screws.
Check screws. Tighten as required, (15-20 Ft.-
Lbs.).
Loose belt.
Tighten wing nut on motor mount until it contacts
the washer, plus one more turn.
Compressor is not supply-
ing enough air to operate
accessories.
Carbon build up.
Prolonged excessive use of air.
Compressor is not large enough
for air requirement.
Remove the head and valve plate. Clean the valve
plate and the top of the piston. (Be sure carbon
does not fall into the cylinder.) Reassemble using
new gaskets and torque screws, 25 to 30 ft. Ibs.
Decrease amount of air usage.
Check the accessory air requirement, ff it is higher
than the SCFM or pressure supplied by your air
compressor, you need a larger compressor.
Restricted air intake filter.
Clean or replace air intake filter. Do not operate the
compressor in the paint spray or sand blasting
area.
2
Hole in hose.
Check valve restricted.
Air leaks.
Check and replace.
Remove and ctean, or replace.
Tighten fittings. (See Air Leaks section of
Troubleshooting Guide, Pg. tl.)