Porter-Cable C7501M - Manual (Page 22)

22 - ENG N020206
PROBLEM CAUSE CORRECTION
Motor will not
run (continued)
Fuse blown, circuit
breaker tripped.
1. Check fuse box for blown fuse
and replace as necessary. Reset
circuit breaker. Do not use a fuse
or circuit breaker with higher
rating than that specified for
your particular branch circuit.
2. Check for proper fuse. You
should use a time delay fuse.
3. Check for low voltage conditions
and/or proper extension cord.
4. Disconnect the other electrical
appliances from circuit or
operate the compressor on
its own branch circuit.
Safety Valve
on pump
"pops" out
Pressure switch, check
valve, or pump could be
in need of servicing.
Have checked by a Trained
Service Technician.
Knocking Noise Possible defect in
safety valve.
Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.
Defective check valve. Remove and clean, or replace.
Loose pulley. Tighten pulley set screw.
Loose flywheel. Tighten flywheel screw.
Compressor mounting
screws loose.
Tighten mounting screws.
Loose belt. Loosen wingnut and then
tighten wingnut until it contacts
the washer, plus one turn.
Carbon build-up in pump. Have checked by a Trained
Service Technician.
Belt too tight. Loosen wingnut and then
tighten wingnut until it contacts
the washer, plus one turn.
Excessive
belt wear
Loose belt. Loosen wingnut and then
tighten wingnut until it contacts
the washer, plus one turn.
Tight belt. Loosen wingnut and then
tighten wingnut until it contacts
the washer, plus one turn.
Loose pulley. Have checked by a Trained
Service Technician.
Pulley misalignment. See Motor Pulley/Flywheel
Alignment paragraph in the
Maintenance section.
Squealing
sound
Compressor pump
has no oil.
See Oil-Checking paragraph
in the Maintenance section.
Loose belt. Loosen wingnut and then
tighten wingnut until it contacts
the washer, plus one turn.