Grizzly G9249 owner manual Service, Troubleshooting, Motor & Electrical

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
Machine	does not	1.	Emergency stop button is engaged, or is at	1.	Rotate the emergency stop button clockwise until it
start or	a breaker		fault.		pops out, or replace faulty emergency stop button.
trips.		2.	Change gear door, headstock cover, or	2.	Make sure the change gear door is closed and
			chuck guard open tripping safety switch.		secure, the headstock cover is all the way down,
					and the chuck guard is in the proper operational
		3.	Plug or receptacle is at fault or wired		position.
			incorrectly.	3.	Test power plug and receptacle for good contact and
		4.	Start capacitor is at fault.		correct wiring.
		5.	Contactor not getting energized or has burnt	4.	Test capacitor and replace if necessary.
			contacts.	5.	Test for power in and out on all legs, and contactor
		6.	Wall fuse or circuit breaker is blown or		operation; replace if faulty.
			tripped.	6.	Make sure circuit breaker/fuse is sized correctly for
		7.	Motor connection is wired incorrectly.		machine load; replace faulty breaker.
		8.	Power supply is at fault, or is switched	7.	Correct motor wiring (Page 66).
			OFF.	8.	Make sure all hot lines and grounds are operational
		9.	Motor ON button is at fault.		and have correct voltage.
		10. Centrifugal switch is at fault.		9.	Replace faulty motor ON button.
		11. Spindle switch is at fault.		10. Adjust/replace.
		12. Cable or wiring is open or has high		11. Test; replace if necessary.
			resistance.	12. Troubleshoot wires for internal/external breaks;
					check for disconnected or corroded connections;
		13. Motor is at fault.			repair or replace faulty wiring or connections.
				13. Test/repair/replace.
Machine	has	1.	Motor or component is loose.	1.	Inspect/replace stripped or damaged fasteners;
vibration	or noisy				re-tighten with thread locking fluid.
operation.		2.	V-belt(s) worn, damaged, or loose.	2.	Replace/re-tension V-belts (Page 51).
		3.	Motor fan is rubbing on fan cover.	3.	Repair/replace dented fan cover or fan.
		4.	Pulley set screws or keys are missing or	4.	Inspect set screws/keys; replace/tighten if
			loose.		necessary.
		5.	Machine is incorrectly mounted to floor.	5.	Re-tighten/replace machine mounting hardware as
					necessary; use shims where required.
		6.	Cutting tool is chattering.	6.	Re-sharpen/replace cutting tool; index tool to
					workpiece; use correct feed rate and spindle speed.
		7.	Workpiece or chuck is at fault.	7.	Re-center and properly secure workpiece in chuck or
					faceplate; replace defective chuck/faceplate.
		8.	Spindle bearings are at fault.	8.	Tighten/replace spindle bearings.
		9.	Motor bearings are at fault.	9.	Rotate motor shaft to check for noisy or burnt
					bearing; repair/replace as necessary.
		10. Gears are at fault.		10. Replace bad gears/bearings.
G9249  12" x 37" Belt Drive Gap Bed Lathe					-53-