Section 7: Service; Troubleshooting - Grizzly G0449 Owner's Manual

SECTION 7: SERVICE

Review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel-
ops. If you need replacement parts or you are unsure of your repair skills, then feel free to call our Technical
Support at (570) 546-9663.
Motor & Electrical
Symptom Possible Cause
Machine does not 1. Emergency stop push-button is engaged/
start or a breaker
faulty.
trips.
2. Power supply switched OFF or is at fault.
3. Start capacitor is at fault (G0449 only).
4. Motor connection wired incorrectly.
5. Thermal overload relay has tripped.
6. Wall fuse/circuit breaker is blown/tripped.
7. Contactor not getting energized/has burnt
contacts.
8. Wiring is open/has high resistance.
9. Emergency stop push-panel is stuck/switch
is at fault.
10. Motor is at fault.
Machine stalls or is 1. Feed rate too fast for task.
overloaded.
2. Workpiece material is not suitable for this
machine.
3. Run capacitor is at fault (G0449 only).
4. Belt(s) slipping.
5. Motor connection is wired incorrectly.
6. Motor bearings are at fault.
7. Machine is undersized for the task.
8. Contactor not getting energized or has poor
contacts.
9. Motor has overheated.
G0449/G0450 37" Drum Sander

Troubleshooting

Possible Solution
1. Rotate clockwise slightly until it pops out/replace it.
2. Ensure power supply is switched on; ensure power
supply has the correct voltage.
3. Test/replace if faulty (G0449 only).
4. Correct motor wiring connections.
5. Unplug machine, open magnetic switch cover, turn
amperage dial on Thermal Protection Circuit Breaker
to a higher amperage setting.
6. Ensure circuit size is suitable for this machine;
replace weak breaker.
7. Test for power on all legs and contactor operation.
Replace unit if faulty.
8. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
9. Free push-panel from binding; replace faulty switch.
10. Test/repair/replace.
1. Decrease feed rate.
2. Only cut wood products; make sure moisture content
is below 20% and there are no foreign materials in
the workpiece.
3. Test/repair/replace (G0449 only).
4. Replace bad belt(s) as a matched set, align pulleys,
and re-tension.
5. Correct motor wiring connections.
6. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
7. Use new sandpaper with appropriate grit; reduce the
feed rate/depth of sanding.
8. Test for power on all legs and contactor operation.
Replace if faulty.
9. Clean off motor, let cool, and reduce workload.
-31-