Section 7: Service; Troubleshooting - Grizzly G0764 Owner's Manual

SECTION 7: SERVICE

Review the troubleshooting and procedures in this section if a problem develops with your machine. If you
need replacement parts or additional help with a procedure, call our Technical Support. Note: Please gather
the serial number and manufacture date of your machine before calling.
Symptom Possible Cause
Machine does not 1. Emergency Stop button is engaged/faulty.
start or a breaker
2. Master power switch turned OFF or is at
trips.
fault.
3. Power supply switched OFF or is at fault.
4. Blade guard limit switch engaged/at fault.
5. Cabinet door is open/door safety switch is
at fault.
6. Motor connection wired incorrectly.
7. Thermal overload relay has tripped.
8. Wall fuse/circuit breaker is blown/tripped.
9. Contactor not getting energized/has burnt
contacts.
10. Wiring is open/has high resistance.
11. Motor ON button is at fault.
12. Set incorrectly or fault.
13. Motor is at fault.
Machine stalls or is 1. Feed rate/cutting speed too fast for task.
underpowered.
2. Workpiece material is not suitable for this
machine.
3. Worn or damaged belts.
4. Motor connection is wired incorrectly.
5. Motor bearings are at fault.
6. Start timer module is at fault.
7. Motor is at fault.
Model G0764 (Mfd. Since 02/14)

Troubleshooting

Possible Solution
1. Rotate clockwise slightly until it pops out/replace it.
2. Turn master power switch ON; replace.
3. Ensure power supply switch is on; ensure power
supply has correct voltage.
4. Move blade guard to working position; replace faulty
limit switch.
5. Close door/replace faulty safety switch.
6. Correct motor wiring connections.
7. Turn cut-out dial to increase working amps and
push reset pin. Replace if tripped multiple times
(weak relay).
8. Ensure circuit size is suitable for this machine;
replace weak breaker.
9. Test for power on all legs and contactor operation.
Replace unit if faulty.
10. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
11. Replace faulty ON button.
12. Adjust to correct delay; replace module.
13. Test/repair/replace.
1. Decrease feed rate/cutting speed.
2. Only cut wood products; make sure moisture
content is below 20% and there are no foreign
materials in the workpiece.
3. Replace bad belts (replace main motor timing belts
as matched set) (Page 75).
4. Correct motor wiring connections.
5. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
6. Adjust to correct delay; replace module.
7. Test/repair/replace.
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