Grizzly G0517g - Manual (Page 29)

Model G0517 Mill/Drill
-27-
Symptom Possible Cause Possible Solution
Machine vibrates
excessively or is unusually
noisy. 1. Motor fan is rubbing on fan cover.
2. Motor or component is loose.
3. Belt is slapping belt cover.
4. V-belt is worn.
5. Pulley is loose.
6. Machine is incorrectly mounted to the
stand, stand is incorrectly mounted to
the floor, or the stand is uneven.
7. Chuck or cutter is at fault.
8. Motor bearings are at fault.
9. Spindle bearings at fault.
1. Replace/repair dented fan cover, and replace loose or
damaged fan.
2. Replace component fasteners and re-tighten with
thread locking fluid.
3. Replace, realign, or re-tension belt (refer to Page
18).
4. Replace belt.
5. Remove pulley, replace with key as required, and re-
install securely.
6. Make sure the mounting hardware is tight; place
shims under machine.
7. Replace out-of-round chuck, replace or resharpen cut-
ter, use appropriate feed rate and cutting RPM.
8. Check bearings, replace motor or bearings as
required.
9. Replace bearings.
Symptom Possible Cause Possible Solution
Drilling stops, but the motor
still operates. 1. The belt is loose, worn, or broken.
2. Bit slips in chuck. 1. Replace or adjust the belt.
2. Tighten bit; inspect bit for burrs or other obstructions
that might interfere with clamping surface.
The chuck wobbles or is
loose on the spindle shaft. 1. Foreign material is stuck between the
chuck-to-spindle mating surface.
2. Damaged chuck.
1. Remove the chuck, clean, and de-burr the tapered
chuck and spindle mating surfaces, then reassemble.
2. Replace.
The spindle does not retract
completely in the upper-
most position or it binds. 1. The quill shaft is gummy with sawdust
and oil.
2. The quill lock is locked or not fully
released.
3. The feed shaft return spring is weak.
1. Clean shaft and lubricate with a light coat of oil.
2. Fully release the quill lock.
3. Increase the feed shaft return spring tension.
The quill has excessive
deflection. 1. The quill bearings are worn or dam-
aged.
2. The quill shaft is at fault.
1. Replace the bearings.
2. Replace the quill shaft.
Drill bit wobbles, holes are
oversized. 1. Drill bit installed incorrectly. 1. Remove drill bit and reinstall.
Mill/Drill Operations