Grizzly G0671 - Manual (Page 40)

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Model G0671/G0672/G0673 (Mfg. Since 1/13
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.
SECTiON 8: SERViCE
Troubleshooting
Motor & Electrical
symptom possible Cause possible solution
Machine does not
start or a breaker
trips. 1. plug/receptacle is at fault or wired
incorrectly.
2. Motor connection wired incorrectly.
3. thermal overload relay has tripped.
4. Contactor not getting energized/has burnt
contacts.
5. power supply is at fault/switched oFF.
6. Motor on button or on/oFF switch is at
fault.
7. Centrifugal switch is at fault.
8. Wiring is open/has high resistance.
9. Motor is at fault.
1. test for good contacts; correct the wiring.
2. Correct motor wiring connections.
3. turn cut-out dial to increase working amps and
push the reset pin. replace if tripped multiple
times (weak relay).
4. test for power on all legs and contactor operation.
replace unit if faulty.
5. ensure hot lines have correct voltage on all legs
and main power supply is switched on.
6. replace faulty on button or on/oFF switch.
7. adjust/replace the centrifugal switch if available.
8. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
9. test/repair/replace.
Machine stalls or is
underpowered. 1. Motor connection is wired incorrectly.
2. plug/receptacle is at fault.
3. Motor bearings are at fault.
4. Motor has overheated.
5. Contactor not getting energized or has
poor contacts.
6. Motor is at fault.
7. Centrifugal switch is at fault.
1. Correct motor wiring connections.
2. test for good contacts; correct the wiring.
3. test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
4. Clean off motor, let cool, and reduce workload.
5. test for power on all legs and contactor operation.
replace if faulty.
6. test/repair/replace.
7. adjust/replace centrifugal switch if available.
Machine has
vibration or noisy
operation. 1. Motor or component is loose.
2. Motor fan is rubbing on fan cover.
3. Motor mount loose/broken.
4. Motor bearings are at fault.
5. Centrifugal switch.
1. inspect/replace stripped or damaged bolts/nuts,
and re-tighten with thread locking fluid.
2. replace dented fan cover; replace loose/damaged
fan.
3. tighten/replace.
4. test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
5. replace.