Grizzly G0456 owner manual Service, Troubleshooting

SECTION 7: SERVICE

Review the troubleshooting and procedures in this section to fix your machine if a problem develops. 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
Machine does not		1.	Emergency lockout enabled.	1.	Turn both paddle switch and speed dial OFF. Turn
start or a breaker					paddle switch ON first, then turn speed dial.
trips.		2.	Power supply is at fault/switched OFF.	2.	Ensure hot lines have correct voltage on all legs and
					main power supply is switched ON.
		3.	Speed dial/rheostat is at fault.	3.	Test/replace if faulty.
		4.	Computer board is at fault.	4.	Inspect computer board; replace if faulty.
		5.	Lockout key is at fault.	5.	Install/replace lockout key; replace switch.
		6.	Motor brushes are at fault.	6.	Remove and replace brushes (refer to Page 34).
		7.	ON/OFF switch is at fault.	7.	Replace faulty ON button or ON/OFF switch.
		8.	Wiring is open/has high resistance.	8.	Repair wiring as necessary.
		9.	Motor is at fault.	9.	Test/repair/replace.
Machine stalls or		1.	Feed rate/cutting speed too fast for task.	1.	Decrease feed rate/cutting speed.
is underpowered.		2.	Low power supply voltage.	2.	Ensure hot lines have correct voltage on all legs.
		3.	Computer board is at fault.	3.	Inspect and replace if faulty.
		4.	Motor speed dial/rheostat is at fault.	4.	Test and replace if faulty.
		5.	Belt(s) slipping.	5.	Replace bad belt(s), align pulleys, and re-tension.
		6.	Plug/receptacle is at fault.	6.	Test for good contacts; correct the wiring.
		7.	Motor brushes are at fault.	7.	Remove and replace brushes (refer to Page 34).
		8.	Motor bearings are at fault.	8.	Test by rotating shaft; rotational grinding/loose shaft
					requires bearing replacement.
		9.	Machine is undersized for the task.	9.	Use sharp lathe bits and chisels; reduce the feed rate/
					depth of cut.
		10. Motor is at fault.		10. Test/repair/replace.
Machine	has	1.	Motor or component is loose.	1.	Inspect/replace stripped or damaged bolts/nuts, and
vibration or noisy					re-tighten with thread locking fluid.
operation.		2.	V-belt(s) worn or loose.	2.	Inspect/replace belts (refer to Page 33).
		3.	Sandpaper damaged, off center, or rub-	3.	Replace sandpaper evenly; adjust table-to-disc dis-
			bing.		tance.
		4.	Pulley is loose.	4.	Realign/replace shaft, pulley, setscrew, and key.
		5.	Machine is uneven on floor/poor mounting.	5.	Tighten floor mounting; relocate/shim machine.
		6.	Workpiece or chuck (if installed) is at fault.	6.	Center workpiece in chuck or face plate; reduce RPM;
					replace defective chuck.
		7.	Motor bearings are at fault.	7.	Test by rotating shaft; rotational grinding/loose shaft
					requires bearing replacement.
		8.	Spindle bearings at fault.	8.	Test by rotating spindle; rotational grinding/loose shaft
					requires bearing replacement.
-30-					G0456 Variable Speed Wood Lathe