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15
10.0 Troubleshooting the IBG series Bench Grinders
Table 3
Symptom Possible Cause Correction *
Motor will not start. Not connected to power source. Verify that plug is properly inserted into
receptacle.
Switch in Off position. Make sure safety key is inserted.
Motor cord cut or abraded. Replace with new cord.
Wheels cannot rotate because of
obstruction.
Unplug and turn grinding wheel by hand to
ensure free movement. Restart.
Plug on cord is faulty. Replace with new plug.
Low line voltage. Check power line for proper voltage.
Fuse blown or circuit breaker open. Re-set. May be too many machines on
one line.
Faulty switch. Replace switch.
Faulty capacitor. Replace capacitor.
Open circuit in motor or loose
connection.
Inspect all lead connections on motor for
loose or open connections.
Motor faulty. Contact JET technical service.
Motor will not start;
fuses blow or circuit
breakers trip.
Too many electrical machines
running on same circuit.
Turn off other machines and try again.
Incorrect fuse. Try time delay fuse, or go to circuit with
higher rated fuse of circuit breaker.
Wheels cannot rotate because of
obstruction.
Unplug and turn grinding wheel by hand to
ensure free movement. Clear any
obstructions and restart.
Undersized extension cord. Use correct size extension cord.
Short circuit in line cord or plug. Inspect cord or plug for damaged
insulation and shorted wires.
Short circuit in motor or loose
connections.
Inspect all connections on motor for loose
or shorted terminals or worn insulation.
Motor fails to develop
full power.
Low line voltage. Check power line for proper voltage.
Faulty motor or capacitor Contact JET technical service.
Motor overheats. Motor overloaded. Reduce pressure against wheel. Make
sure grit size is appropriate for the job.
Motor stalls, resulting
in blown fuses or
tripped circuit.
Motor overloaded. Reduce load on motor; do not press so
hard.
Capacitor failure. Contact JET technical service.
Short circuit in motor or loose
connections.
Inspect connections on motor for loose or
shorted terminals or worn insulation.
Low voltage. Correct the low voltage conditions.
Incorrect fuses or circuit breakers in
power line.
Install correct fuses or circuit breakers.
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