Grizzly T33903 Owner's Manual page 41

17" & 20" floor drill press w/led light & laser guide
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Motor & Electrical (Cont.)
Symptom
Possible Cause
Machine has
7. Chuck or cutter at fault.
vibration or
8. Motor fan rubbing on fan cover.
noisy operation.
9. Spindle bearings at fault.
10. Centrifugal switch needs adjustment/at fault.
11. Motor bearings at fault.
LED does not
1. Lens covered with dust.
illuminate.
2. Wiring broken, disconnected, or corroded.
3. LED or LED driver damaged/at fault.
4. LED switch at fault.
Laser guide
1. Lens covered with dust.
does not
2. Wiring broken, disconnected, or corroded.
illuminate.
3. Laser module(s) damaged/at fault.
4. Laser switch at fault.
5. Laser LED driver at fault.
Operation
Symptom
Possible Cause
Tool falls out or
1. Chuck jaws loose.
loose in chuck.
2. Excessive feed pressure.
Chuck and
1. Debris on chuck, arbor, or in spindle taper.
arbor fall out
or loose in
2. Excessive feed pressure.
spindle.
Breaking tools
1. Spindle speed/feed rate too fast.
or cutters.
2. Taking too big of cut at one time.
3. Improper cutting technique or type of cut for
tool/machine.
4. Cutting tool too small.
5. Cutting tool getting too hot.
6. Spindle extended too far down during or at
beginning of operation.
Workpiece or
1. Spindle extended too far down during or at
tool vibrates or
beginning of operation.
chatters during
2. Table lock handles not tight.
operation.
3. Workpiece not secure.
4. Spindle speed/feed rate too fast.
5. Quill shaft lock screw not adjusted correctly.
Table hard to
1. Table locked.
move.
2. Dirty or dry rack and pinion.
Backside of
1. Scrap board not installed between table and
workpiece
workpiece.
splinters.
Model T33903/T33904 (Mfd. Since 07/23)
Possible Solution
7. Replace out-of-round chuck, dull, or bent cutter.
8. Fix/replace fan cover; replace loose/damaged fan.
9. Test by rotating spindle; rotational grinding/loose shaft
requires bearing replacement.
10. Adjust/replace if at fault.
11. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
1. Clean lens.
2. Fix broken wires or disconnected/corroded
connections (Page 47).
3. Replace LED or driver (Page 44).
4. Replace switch.
1. Clean lens.
2. Fix broken wires or disconnected/corroded
connections (Page 47).
3. Replace lase module(s) (Page 44).
4. Replace switch.
5. Replace laser LED driver.
Possible Solution
1. Tighten chuck jaws.
2. Decrease feed pressure and allow chips to clear.
1. Clean chuck, arbor, and spindle taper, then re-install
(Page 22).
2. Decrease feed pressure and allow chips to clear.
1. Reduce spindle speed (Page 29); reduce feed rate.
2. Decrease feed pressure and allow chips to clear.
3. Use right technique, tool, or machine for job.
4. Use larger cutting tool and slower feed rate.
5. Use coolant or oil for appropriate application; reduce
cutting speed (Page 29).
6. Fully retract spindle and raise table to increase rigidity.
1. Fully retract spindle and raise table to increase rigidity.
2. Tighten table lock handles (Page 32).
3. Properly clamp workpiece on table or in vise.
4. Reduce spindle speed (Page 29); reduce feed rate.
5. Adjust quill shaft lock screw (Page 46).
1. Disengage table locks (Page 32).
2. Clean away chips/debris. Lubricate rack and pinion
(Page 37).
1. Install scrap board between table and workpiece.
-39-

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T33904

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