Craftsman 919.17673 - 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
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.
Air leaks at pressure
switch release valve Defective pressure switch
release valve.
Remove and replace the release valve.
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.
Air leaks in air tank Defective air tank. Air tank must be replaced. Do not repair the leak.
WARNING
DO NOT DRILL INTO, WELD, OR OTHER­
WISE MODIFY AIR TANK OR IT WILL
WEAKEN.
Air leaks from safety valve Possible defect in safety valve Operate safety valve manually by pulling on ring. If
valve still leaks, it should be replaced.
Regulator knob - continu­
ous air leak. Regulator will
not shut-off at air outlet.
Dirty or damaged regulator inter­
nal parts. Clean or replace regulator, or internal parts.
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.
Carbon build up. Remove the head and valve plate. Clean the valve
plate and the top of the piston. (Be sure carbon
does not fat! into the cylinder.) Reassemble using
new gaskets and torque screws, 25 to 30 ft. lbs.
Compressor is not supply­
ing enough air to operate
accessories.
Prolonged excessive use of air.
Compressor is not large enough
for air requirement.
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.
Restricted air intake filter. Clean or replace air intake filter. Do not operate the
compressor in the paint spray or sand blasting
area.
Hole in hose. Check and replace.
Check valve restricted. Remove and clean, or replace.
Air leaks.
Tighten fittings. (See Air Leaks section of
Troubleshooting Guide, Pg. 11.)