Grizzly G9986 instruction manual Drill Press Operations

Symptom	Possible Cause	Possible Solution
Machine vibrates	1. Motor or component is loose.	1.Replace component fasteners and re-tighten with
excessively or is unusually		thread locking fluid.
noisy.	2. Belt is slapping belt cover.	2. Replace, realign, or retension belt (refer to Page 14).
	3. V-belt is worn or is loose.	3. Replace belt.
	4. Motor fan is rubbing on fan cover.	4. Replace/repair dented fan cover, and replace loose or
		damaged fan.
	5. Pulley is loose.	5. Remove pulley, replace with key as required, and re-
		install securely.
	6. Machine is incorrectly mounted to	6. Make sure the mounting hardware is tight; place
	the workbench, or the workbench is	shims under machine.
	uneven.
	7. Chuck or cutter is at fault.	7. Replace out-of-round chuck, replace or resharpen cut-
		ter, use appropriate feed rate and cutting RPM.
	8. Motor bearings are at fault.	8. Check bearings, replace motor or bearings as
		required.
	9. Spindle bearings at fault.	9. Replace bearing.

Drill Press Operations

Symptom	Possible Cause	Possible Solution
Drilling stops, but the motor	1. The belt is loose or worn.	1. Replace and/or adjust the belt.
still operates.	2. The pulley for the spindle shaft or the	2. To resecure the pulley, do these steps:
	motor is slipping on the shaft.	a. UNPLUG THE DRILL PRESS.
		b. Remove the setscrew on the slipping pulley.
		c. Align the flats on the pulley shaft with the setscrew
		hole.
		d. Reinstall and tighten the setscrew.
	3. Bit slips in chuck.	3. Tighten bit; inspect bit for burrs or other obstructions
		that might interfere with clamping surface.
The chuck wobbles or is	1. Foreign material is stuck between the	1. Remove the chuck and clean and de-burr the tapered
loose on the spindle shaft.	chuck-to-spindle mating surface.	chuck and spindle mating surfaces, then reassemble.
	2. Damaged chuck.	2. Replace.
The spindle does not retract	1. The quill shaft is gummy with sawdust	1. Clean shaft and lubricate with a light coat of oil.
completely in the upper-	and oil.
most position or it binds.	2. The feed shaft return spring is weak.	2. Increase the feed shaft return spring tension as
		described on Page 21.
	3. The quill deflection screw is binding	3. Loosen the jam nut, and slightly turn out the screw
	the quill.	where the quill binds. Retighten the jam nut and
		recheck for binding and looseness at all spindle loca-
		tions.
The quill has excessive	1. The quill shaft is at fault.	1. Adjust the quill screw.
deflection.	2. The quill and/or bearings are worn.	2. Replace the quill and/or bearings.
Holes drilled at an angle.	1. Table is not at 90 degrees.	1. Adjust table angle (see Page 13).
Drill bit wobbles, holes are	1. Drill bit installed incorrectly.	1. Remove drill bit and reinstall.
oversized.

-20- Model G9986 8" Drill Press