Grizzly G7947 User Manual
-36-
G7947/G7948 12 Speed Floor Drill Press
Symptom
Possible Cause
Possible Solution
Machine has vibration or noisy operation. 1. Motor or component is loose.
2. Belts are slapping belt cover.
3. V-belt(s) is worn or is loose.
4. Motor fan is rubbing on fan cover.
4. Motor fan is rubbing on fan cover.
5. Pulley is loose.
6. Machine is incorrectly mounted to the
floor, or the floor is uneven.
7. Chuck or cutter is at fault.
8. Motor bearings are at fault.
9. Spindle bearings at fault.
1. Inspect, replace for stripped or dam-
aged bolts/nuts, and re-tighten with
thread locking fluid.
thread locking fluid.
2. Replace/realign belts with a new
matched set, and retension belts (refer
to
to
Page 28).
3. Replace belts.
4. Replace/repair dented fan cover, and
4. Replace/repair dented fan cover, and
replace loose or damaged fan.
5. Remove pulley, replace with key as
required, and re-install securely.
6. Make sure floor mounting hardware is
tight; place shims under machine.
7. Replace out-of-round chuck, replace or
resharpen cutter, use appropriate feed
rate and cutting RPM.
rate and cutting RPM.
8. Check bearings, replace motor or bear-
ings as required.
9. Replace bearing.