Grizzly G9249 owner manual Service, Troubleshooting, Motor & Electrical

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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
		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).
		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-

Image 55

Contents Model G9249 Ss ,EAD from Leadbased PAINTS Table of Contents Foreword Functional Overview IntroductionContact Info Identification Machine Data Sheet Tailstock Info Other Specifications !,7!93 53%3 %!2.2 02/4%#4/ %. /0%2!4.! -!#.%29 !,7!93 53% !.3 !002/6%$$ 3!&%49 ,!33%33 7%. /0%2!4 !,7!93 ,/#+ -/,% !3%3 & 53%$ % %&/2% /0%2!4. -!#.%29# 53%3!!2/5.$%$ %84%.3/..#/2$ 2!4%$4&/2/4%-!#.%!-0%2!%2 53%3 2%#/--%.$%$- !##%33/2%3 -!.9 -!#.%3 #!. %*%#4 7/2+0%#%3 4/7!2$ /0%2!4/2Additional Safety Instructions For Metal Lathes 220V Operation Circuit RequirementsUnpacking SetupSetup Safety Items Needed for SetupBox 1 Inventory Figure Qty InventoryBox 2 Inventory Figure Qty Left Cabinet Stand Clean UpFloor Load Lathe Assembly PlacementPlacement Location Site ConsiderationsLoosening the carriage lock bolt Mounting to Shop Floor Using Machine MountsBolting to Concrete Floors Lubrication subsection on Check Gearbox OilTest Run To test run the machineMERGENCYG3TOP Utton Factory adjustments that should be verified Recommended AdjustmentsSpindle Break-In Headstock Controls Operation SafetyOperations Basic ControlsTailstock Controls Carriage ControlsTools Needed Qty Chuck & Faceplate Mounting/RemovalTo remove a chuck or faceplate Mounting a Chuck or Faceplate Mounting a WorkpieceTo remove and install the jaws Using the 3-Jaw ChuckTo mount a workpiece in the 3-jaw chuck To mount a workpiece on the 4-jaw chuck Using the 4-Jaw ChuckTo mount a workpiece on the faceplate Using the FaceplateInstalling a Sleeve and Center into the Spindle CentersTailstock Installing a Tapered Tool into the QuillRemoving a Sleeve and Center from the Spindle To align the tailstock with the headstock Offsetting TailstockTo set up the tailstock to cut a shallow taper Aligning TailstockStep Drilling with Tailstock To set up the tailstock for drillingTo remove a tapered drill arbor or drill bit Steady Rest To install and use the steady restCross Slide Follow RestHandwheel Dial Increments To load and use the 4-way tool post Compound SlideTool Posts To set the compound slide angleSpindle Speed Configuring the V-Belts and Back GearCalculating the Correct Spindle RPM To disengage the back gears To engage the back gearsPower Feed Recommended Feed Rates Setting Feed RateTo set the feed rate Change Gears To re-configure the change gearsChange gear. G9249 12 x 37 Belt Drive Gap Bed Lathe Side Front ViewTo cut threads Threading OperationEdhidc H3022-Measurement Tool Set AccessoriesH2670-HSS Square Tool Bits Pc. Carbide Tipped Tool Bit SetsH5936-2 Pc. Knurling Tool Set H2996-Double Ended Boring BarG1070-MT3 Live Center Set H6879-Lathe Operation & Maintenance BookCleaning Protecting MaintenanceSchedule To add oil to the spindle bearing reservoirs LubricationSpindle Bearing Oil Lubricant Frequency QtyHeadstock Spindle Pulley Shaft Headstock Change GearsHeadstock Idler Pulley Shaft Headstock GearsApron Gearbox Feed Rate GearsTo lubricate the feed rate gears Back Gear Shaft Ball OilersReplacing Motor V-Belt Adjusting Motor V-BeltTo adjust the motor V-belt tension Tensioning Replacing V-BeltsSpindle V-Belt Power Twist V-Belt G9249 12 x 37 Belt Drive Gap Bed LatheTroubleshooting ServiceMotor & Electrical Faceplate Operations To adjust the saddle gib Adjusting GibsTo adjust the cross slide and compound slide gibs Cross Slide Backlash To adjust the tailstock lockTo adjust the cross slide backlash Tailstock LockSpindle Bearing Preload Gap RemovalDisconnect Lathe from Power To confirm that the bearings are correctly pre- loaded Type of Finger Tip Part Number To remove/install the rest fingersTo remove/install the brass tips Rest Finger TipsTo adjust the half-nut guide bar Adjusting Half-NutElectrical Safety Instructions WiringMotor Wiring OverviewDiagram on Control PanelElectrical Cabinet Wiring Diagram Box Control Panel & Motor Wiring DiagramsBed PartsHeadstock Figured Flat NUT M8-1.25 Headstock Parts ListBushing Feed Rate Gearbox Feed Rate Gearbox Parts List Apron Apron Parts List + + Carriage Parts List #* #+ Spindle Lever Change Gear Cover Complete Steady Rest Complete Follow Rest Electrical Cabinet Electrical Cabinet Parts List Cabinet Stand Accessories Label Placement 22!.49 #!2$ 99.$5342!, .# 0//88 %,,.!- 7! Warranty and Returns #ALL 4ODAYD&ORO! &2%%