Grizzly G9749 owner manual About Service, Troubleshooting, Motor & Electrical

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SECTION 7: 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 how to perform the procedures in this section, then feel free to call our Technical Support at (570) 546-9663.

Troubleshooting

Motor & Electrical

Symptom	Possible Cause		Possible Solution
Machine does not start or a	1.	Plug or receptacle is at fault or	1.	Test power plug and receptacle for good contact
breaker trips.		wired incorrectly.		and correct wiring.
	2.	Cable or wiring is open or has high	2.	Troubleshoot wires for internal or external breaks,
		resistance.		check for disconnected or corroded connections
				and repair or replace wiring, as necessary.
	3.	Power supply is faulty, or is switched	3.	Make sure all hot lines and grounds are operational
		OFF.		and have correct voltage on all legs.
	4.	Rotary switch at fault.	4.	Replace faulty switch.
	5.	Motor connection is wired incor-	5.	Correct motor wiring (see Wiring Diagram on Page
		rectly.		30).
	6.	Motor is at fault.	6.	Test, repair or replace motor.

Machine stalls or is under-	1.	Incorrect drilling speed or feed	1.	Decrease drilling speed or feed rate.
powered.		rate.
	2.	Machine is undersized for the task.	2.	Use smaller drill bits/cutters and reduce the feed
				rate and spindle speed.
	3.	Bit or cutter is too large for	3.	Use a smaller bit or cutter.
		machine.
	4.	Belt is slipping.	4.	Replace, realign, or re-tension belt.
	5.	Plug or receptacle is at fault.	5.	Test power plug and receptacle for good contact
				and correct wiring.
	6.	Pulley is slipping on shaft.	6.	Replace loose pulley and shaft.
	7.	Motor bearings are at fault.	7.	Rotate motor shaft for noisy or burnt bearings,
				repair/replace as required.
	8.	Motor has overheated.	8.	Clean dust off motor, let it cool, and reduce work-
				load on machine.
	9.	Motor connection is wired incor-	9.	Correct motor wiring (see Wiring Diagram on Page
		rectly.		30).
	10.	Motor is at fault.	10.	Test, repair or replace motor.

G9749 Variable Speed Drill Press

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Contents Model G9749 Variable Speed Drill Press Page Table of Contents Contact Info IntroductionForeword Machine Data Sheet Other Related Information Identification G9749 Variable Speed Drill Press Safety Instructions for Machinery Additional Safety for Drill Presses 110/220V Operation Circuit RequirementsAmperage Draw Circuit RequirementsExtension Cords Grounding220V Operation 110V OperationSetup Safety SetupItems Needed for Setup Site ConsiderationsTo unpack and move the drill press Unpacking LiftingTo mount the drill press to the floor Mounting to Shop FloorBolting to Concrete Floors Contents Figure Qty Inventory Clean UpTo install the rapid downfeed handles AssemblyTo install the table crank handle Components and Hardware Needed QtyTo test run the machine Test Run Spindle Break-InOperations Installing Drill ChuckTo install the drill chuck onto the arbor To install a drill bit into the chuck Installing/Removing Drill BitsChanging Speeds To remove a drill bit from the chuckLubrication Suggestions Using the Drill Bit Speed ChartChoosing Speeds To use the quill lock DrillingQuill Travel To use the depth gauge and depth stop To use the rapid downfeed controlTo use the fine downfeed control To adjust table height and rotation Table AdjustmentsHeadstock Rotation To rotate the headstockTo remove the arbor and chuck from the spindle Removing/Installing Arbor and ChuckTo remove the chuck from the arbor To install the arbor into the spindle with the drawbarG1076-52-PC. Clamping Kit AccessoriesH5685-4Rotary Table Schedule MaintenanceUnpainted Cast Iron LubricationAbout Service ServiceTroubleshooting Symptom Possible Cause Possible SolutionDrill Operations Electrical Components G9749 switch wiringWiring Diagram Headstock Parts Breakdown Headstock Components Parts Breakdown Variable Speed Parts Breakdown Base Parts Breakdown Description Parts ListFlat Washer 1/4 403 401 405 404 400 402 406 Label PlacementWarranty and Returns Page Page