Section 7: Service; Troubleshooting - Grizzly G0750GV Owner's Manual

SECTION 7: SERVICE

Review the troubleshooting 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.
Motor & Electrical
Symptom Possible Cause
Machine does not 1. RESET or E-Stop button engaged or at
start or a circuit fault.
breaker trips. 2. Circuit breaker tripped in machine electrical
box.
3. Power supply switched OFF or at fault.
4. Motor/plug wired incorrectly.
5. Thermal overload relay has tripped.
6. Wall fuse/circuit breaker is blown/tripped;
short in electrical system; start-up load too
high for circuit.
7. Start capacitor at fault.
8. Contactor not getting energized/has burned
contacts.
9. Wiring is open/has high resistance.
10. Motor is at fault.
Motor stalls or is 1. Belt(s) slipping.
underpowered. 2. Run capacitor at fault.
3. Plug/receptacle at fault.
4. Gearbox at fault.
5. Motor overheated.
6. Contactor not energized/has poor contacts.
7. Motor bearings at fault.
8. Motor at fault.
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Troubleshooting

Possible Solution
1. Press RESET button to reset circuit; rotate E-Stop
button to reset; replace if not working properly.
2. Inspect/reset circuit breaker; determine if overload
is due to heavy operation; ensure power source has
correct voltage.
3. Ensure power supply is ON/has correct voltage.
4. Correct motor/plug wiring connections (Page 84).
5. Turn the thermal relay cut-out dial to increase
working amps and push the reset pin. Replace if
tripped multiple times (weak relay).
6. Verify circuit is rated for machine amp load;
troubleshoot and repair cause of overload; replace
weak breaker; find/repair electrical short.
7. Test/replace if faulty.
8. Test for power on all legs and contactor operation.
Replace unit if faulty.
9. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
10. Test/repair/replace.
1. Tension/replace belt(s); ensure pulleys are aligned.
2. Test/repair/replace.
3. Test for good contacts/correct wiring.
4. Select appropriate gear ratio; replace broken or
slipping gears.
5. Allow motor to cool; reduce load on motor.
6. Test all legs for power/replace if faulty.
7. Test/repair/replace.
8. Test/repair/replace.
Model G0750GV (Mfd. Since 03/18)