Grizzly G9986 instruction manual About Service, Troubleshooting, Motor & Electrical

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, you need replacement parts, or you are unsure of how to perform the pro- cedures 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 wired	1. Test power plug and receptacle for good contact and
breaker trips.	incorrectly.	correct wiring.
	2. Motor connection is wired incorrectly.	2. Correct motor wiring (see Page 23).
	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. Safety switch key is at fault.	4. Install or replace safety key, or replace switch assem-
		bly.
	5. ON/OFF switch is faulty.	5. Replace faulty switch.
	6. Cable or wiring is open or has high	6. Troubleshoot wires for internal or external breaks,
	resistance.	check for disconnected or corroded connections and
		repair or replace wiring.
	7. Motor is at fault.	7. Test, repair or replace motor.
Machine stalls or is under-	1. Incorrect spindle speed for task.	1. Decrease spindle speed.
powered.	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 dull.	3. Sharpen/replace bit or cutter.
	4. Low power supply voltage.	4. Make sure hot lines and grounds are operational w/
		correct voltage.
	5. Belt(s) is slipping.	5. Replace bad belts, align pulleys, and re-tension.
	6. Plug or receptacle is at fault.	6. Test power plug and receptacle for good contact and
		correct wiring.
	7. Motor connection is wired incorrectly.	7. Correct motor wiring (see Page 23).
	8. Pulley is slipping on shaft.	8. Replace loose pulley and shaft.
	9. Motor bearings are at fault.	9. Rotate motor shaft for noisy or burnt bearings, repair/
		replace as required.
	10. Motor has overheated.	10. Clean dust off motor, let it cool, and reduce workload
		on machine.
	11. Motor is at fault.	11. Test, repair or replace motor.

Model G9986 8" Drill Press -19-