Craftsman CMXECXM301 Instruction Manual page 18

ENGLISH
PROBLEM
The compressor is making knocking
sounds.
There is excessive belt wear.
Tank is slow to build pressure or will not
build pressure
There is excessive moisture in the discharge
air.
The fuses blow or the circuit breaker trips
repeatedly.
Excessive tank pressure - safety valve
pops off.
Air leaks at fittings.
Air leaks in air tank or at air
tank welds.
CAUSE
There is a loose pulley.
There is a loose flywheel.
The compressor mounting screws are
loose.
The belt is too loose.
An excessive amount of carbon has built-
up in the pump.
The belt is too tight.
The belt is too loose.
The belt is too tight.
The pulley is loose.
The pulley is misaligned.
The connections (fittings, tubing, etc.) are
loose and leaking.
The drain valve is loose or open.
The check valve is leaking.
There is excessive water in the air tank.
The oil blow-by has accumulated in
the pump.
The incorrect fuse size is being used, or
the circuit is overloading.
There are loose electrical connections.
There is a defective check valve or
unloader.
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.
Defective air tank.
16
CORRECTION
Tighten the pulley set screws.
Tighten the flywheel screw.
Tighten the mounting screws.
Check the belt tension.
Bring the compressor to a service center.
Check the belt tension.
Check the belt tension.
Check the belt tension.
Align the pulley/flywheel. Correct the belt tension. Torque
the set screws.
Align the pulley/flywheel.
Check all the connections with a soap and water solution
and tighten.
Tighten the drain valve.
Bring the compressor to a service center.
It is normal for oil lube air compressor pumps to release
some oil into the tank and air lines. Air compressors will also
generate water condensation that will form in the tank and
air lines. Install water and oil filter traps when needed. The
Typical Compressed Air Distribution System section provides
a guideline. Contact or call Craftsman Customer Service for more
information.
IMPORTANT: If the tank or air lines have excessive water and/or
oil, bring the compressor to a service center.
Verify the proper fuse size is being used.
Use time-delay fuses.
Disconnect other electrical appliances from the circuit or
operate the compressor on its own branch circuit.
Verify the wiring connection inside the pressure switch and the
terminal box area.
Bring the compressor to a service center.
Clean or replace check valve
Move On/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 solution. Do Not Overtighten.
Air tank must be replaced. Do not repair the leak.
WARNING: Risk bursting. Do not drill into, weld or
otherwise modify air tank or it will weaken. The tank
can rupture or explode.