Loading ...
Loading ...
Loading ...
15
10.0 Troubleshooting JBG-6W, JBG-8W Bench Grinders
Table 4
Symptom Possible Cause Correction *
Motor will not start. Not connected to power source. Verify that switch is on and plug is properly
inserted into receptacle.
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 tripped. Re-set. May be too many machines on one
line; use dedicated line if needed.
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 fault. Contact JET technical service.
Motor will not start;
fuses blow or circuit
breakers trip.
Too many machines running on same
circuit.
Turn off other machines and try again. Use
dedicated circuit if needed.
Incorrect fuse. Try time delay fuse, or go to circuit with
higher rated fuse or 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.
Capacitor or motor failure. Contact JET technical service.
Motor overheats. Motor overloaded. Reduce pressure against wheel. Make sure
grit size is appropriate for the job.
Poor motor ventilation. Unplug and clean out around motor;
provide better air circulation.
Capacitor or motor failure. Contact JET technical service.
Motor stalls, resulting
in blown fuses or
tripped circuit.
Motor overloaded. Reduce load on motor; do not press so
hard when grinding.
Capacitor or motor 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 low voltage conditions.
Incorrect fuses or circuit breakers in
power line.
Install correct fuses or circuit breakers.
Motor slows. Motor overloaded. Reduce load on motor; do not press so
hard when grinding.
Low line voltage. Check power line for proper voltage.
Loose connections. Inspect and remedy.
Loading ...
Loading ...
Loading ...