Grizzly G0644 owner manual Service, Troubleshooting

troubleshooting

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.

Troubleshooting

Motor & Electrical

Symptom		Possible Cause		Possible Solution
Motor does not start		1.	Compressed air to the machine is not at 57	1.	Connect clean, dry compressed air to the machine at
or a breaker trips.			PSI.		57 PSI.
		2.	Sanding motor is not on (conveyor motor).	2.	Turn sanding motor on before conveyor motor.
		3.	Emergency stop push-button is engaged/	3.	Rotate clockwise slightly until it pops out/replace it.
			faulty.
		4.	Air pressure safety switch is at fault.	4.	Test/replace air pressure safety switch; adjust (Page
					33).
		5.	Switch disabling key is removed (conveyor	5.	Install switch disabling key.
			motor).
		6.	Plug/receptacle is at fault or wired incor-	6.	Test for good contacts; correct the wiring.
			rectly.
		7.	Start capacitor is at fault.	7.	Test/replace if faulty.
		8.	Conveyor speed dial is at fault.	8.	Test/replace if faulty.
		9.	Motor connection wired incorrectly.	9.	Correct motor wiring connections.
		10. Wall fuse/circuit breaker is blown/tripped.		10. Ensure circuit size is suitable for this machine;
					replace weak breaker.
		11. Thermal overload relay has tripped.		11. Turn cut-out dial to increase working amps and push
					the reset pin. Replace if tripped multiple times (weak
					relay).
		12. Contactor not getting energized/has burnt		12. Test for power on all legs and contactor operation.
			contacts.		Replace unit if faulty.
		13. Power supply switched OFF or is at fault.		13. Ensure power supply is switched on; ensure power
					supply has the correct voltage.
		14. Wiring is open/has high resistance.		14. Check for broken wires or disconnected/corroded
					connections, and repair/replace as necessary.
		15. Motor ON button (sanding motor) or ON/		15. Replace faulty ON button or ON/OFF switch.
			OFF switch (conveyor motor) is at fault.
		16. Centrifugal switch is at fault.		16. Adjust/replace the centrifugal switch if available.
		17. Motor is at fault.		17. Test/repair/replace.
Machine	has vibra-	1.	Motor or component is loose.	1.	Inspect/replace stripped or damaged bolts/nuts, and
tion or noisy opera-					re-tighten with thread locking fluid.
tion (a	metallic	2.	Motor mount loose/broken.	2.	Tighten/replace.
"thump" sound dur-		3.	Motor fan is rubbing on fan cover.	3.	Replace dented fan cover; replace loose/damaged
ing operation is nor-
mal).					fan.
		4.	Motor bearings are at fault.	4.	Test by rotating shaft; rotational grinding/loose shaft
					requires bearing replacement.
		5.	Centrifugal switch at fault.	5.	Replace.
G0644 15" Open-End Wide Belt Sander					-29-