PROBLEM
Air leaks in air tank o_
at air tank welds.
Air leak from safety
valve.
Knocking noise
Restricted air intake
Compressor is not
supplying enough
air to operate
accessories.
CAUSE
Damagedairtank.
Possible defect in safety
valve
Restricted or malfunctioning
check valve.
Loose pulley.
Low oil level.
Loose flywheel.
Loose compressor mounting
screws.
Loose belt.
Belt too tight.
Carbon build-up.
Dirty air filten
Prolonged excessive use of air.
Compressor is not large
enough for air requirement.
Restricted air intake filten
Loose belt.
Hole in hose.
Check valve restricted.
Air leaks.
CORRECTION
Air tank must be replaced. Do not
repair the leak.
• _r_ DO NOT DRILL
INTO, WELD, OR OTHERWISE
MODIFY AIR TANK OR IT WILL
WEAKEN. THE TANK CAN
RUPTURE OR EXPLODE.
Operate safety valve manually by
pulling on ring. if valve still leaks, it
must be replaced.
Remove and clean or replace.
Torque pulley set screw.
Maintain prescribed oil level. Add
oil.
Torque screw 15-20 ft. Ibs.
Check screws. Torque as required
15-20 ft.-Ibs.)
Tighten wing nut until it contacts
the washer, plus one more turn.
Adjust belt tension (see "Belt
Replacement" .)
Remove the head and valve plate.
Clean the valve plate and top of the
piston. (Be sure carbon does not fall
into the cylinder.) Reassemble to
25-30 ft. Ibs. Using new gasket and
torque screws.
Replace filter.
Decrease amount of air usage.
Check the accessory air
requirement. If it is higher than the
CFM, SCFM or pressure supplied
by your air compressor, you need a
larger compressor.
Clean or replace air intake filter. Do
not operate the compressor in the
paint spray area.
Adjust belt tension.
Check and replace if required.
Remove and clean or replace.
Tighten fittings. (See "Air Leaks"
section of "Troubleshooting Guide".)
D24938 18 ENG
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