Grizzly G0508 owner manual About Service, Troubleshooting, Motor & Machine Operation

SECTION 8: SERVICE

About Service

This section is provided for your convenience—it is not a substitute for the Grizzly Service Department. If you need help troubleshooting, need replacement parts, or are unsure of how to perform the procedures in this section, please call our Technical Support at (570) 546-9663.

Troubleshooting

Motor & Machine Operation

SYMPTOM		POSSIBLE CAUSE		CORRECTIVE ACTION
Machine does not start or	1.	Plug/receptacle is at fault or wired	1.	Test for good contacts; correct the wiring.
a breaker trips.		incorrectly.	2.	Correct motor wiring connections.
	2.	Motor connection wired incorrectly.	3.	Turn cut-out dial to increase working amps and
	3.	Thermal overload relay has		push the reset pin. Replace if tripped multiple
		tripped.		times (weak relay).
	4.	Contactor not getting energized/	4.	Test for power on all legs and contactor operation.
		has burnt contacts.		Replace unit if faulty.
	5.	Power supply is at fault/switched	5.	Ensure hot lines have correct voltage on all legs
		OFF.		and main power supply is switched ON.
	6.	Motor ON button or ON/OFF	6.	Replace faulty ON button or ON/OFF switch.
		switch is at fault.
	7.	Centrifugal Switch is at fault.	7.	Adjust/replace the centrifugal switch if available.
	8.	Wiring is open/has high	8.	Check for broken wires or disconnected/corroded
		resistance.		connections, and repair/replace as necessary.
	9.	Motor is at fault.	9.	Test/repair/replace.
	10.	Start delay module is at fault.	10.	Adjust to correct delay; replace module.
Machine stalls or is	1.	Motor connection is wired	1.	Correct motor wiring connections.
underpowered.		incorrectly.	2.	Test for good contacts; correct the wiring.
	2.	Plug/receptacle is at fault.	3.	Test by rotating shaft; rotational grinding/loose
	3.	Motor bearings are at fault.		shaft requires bearing replacement.
	4.	Motor has overheated.	4.	Clean off motor, let cool, and reduce workload.
	5.	Contactor not getting energized or	5.	Test for power on all legs and contactor operation.
		has poor contacts.		Replace if faulty.
	6.	Motor is at fault.	6.	Test/repair/replace.
	7.	Centrifugal switch is at fault.	7.	Adjust/replace centrifugal switch if available.
Machine has vibration or	1.	Motor or component is loose.	1.	Inspect/replace stripped or damaged bolts/nuts,
noisy operation.				and re-tighten with thread locking fluid.
	2.	Motor fan is rubbing on fan cover.	2.	Replace dented fan cover; replace loose/damaged
				fan.
	3.	Cast iron motor mount loose/	3.	Tighten/replace.
		broken.	4.	Test by rotating shaft; rotational grinding/loose
	4.	Motor bearings are at fault.		shaft requires bearing replacement.
	5.	Centrifugal switch.	5.	Replace

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