Section 7: Service; Troubleshooting - Grizzly G0801 Owner's Manual

SECTION 7: SERVICE

Review the troubleshooting procedures in this section if a problem develops with your machine. If you need
replacement parts or additional help with a procedure, call our Technical Support. Note: Please gather the
serial number and manufacture date of your machine before calling.
Motor & Electrical
Symptom Possible Cause
Machine does not 1. Incorrect power supply voltage/circuit size.
start or a breaker
2. Power supply circuit breaker tripped or fuse
trips.
blown.
3. Motor wires connected incorrectly.
4. Plug/receptacle at fault/wired wrong.
5. Wiring open/has high resistance.
6. Spindle rotation switch at fault.
7. Start capacitor at fault.
8. Centrifugal switch at fault.
9. Motor at fault.
Machine stalls or is 1. Machine undersized for task.
underpowered.
2. Feed rate/cutting speed too fast.
3. Wrong tooling for workpiece material.
4. Belts are loose/slipping/worn/oily.
5. Motor wired incorrectly.
6. Spindle rotation switch at fault.
7. Motor overheated.
8. Pulley/sprocket slipping on shaft.
9. Centrifugal switch at fault.
10. Motor bearings at fault.
Machine has 1. Workpiece loose.
vibration or noisy
2. Belt(s) worn or loose.
operation.
3. Motor or component loose.
4. Chuck or cutter at fault.
5. Belt(s) slapping headstock casting/guard.
6. Motor fan rubbing on fan cover.
7. Pulley loose.
8. Machine incorrectly mounted.
9. Motor bearings at fault.
10. Centrifugal switch at fault.
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Troubleshooting

Possible Solution
1. Ensure correct power supply voltage/circuit size.
2. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
3. Correct motor wiring connections.
4. Test for good contacts; correct the wiring.
5. Check/fix broken, disconnected, or corroded wires.
6. Replace switch.
7. Test/replace.
8. Adjust/replace centrifugal switch if available.
9. Test/repair/replace.
1. Use correct cutter/bit; reduce feed rate; reduce
spindle RPM; use coolant if possible.
2. Decrease feed rate/cutting speed.
3. Use correct type/size of tooling.
4. Properly tension belts (Page 48). Replace belts if
worn or contaminated with grease or oil.
5. Wire motor correctly.
6. Test/replace switch.
7. Clean motor, let cool, and reduce workload.
8. Replace loose pulley/shaft.
9. Adjust/replace centrifugal switch if available.
10. Test/repair/replace.
1. Use correct holding fixture/reclamp workpiece.
2. Inspect/replace belts with a new matched set.
3. Inspect/replace damaged bolts/nuts, and retighten
with thread locking fluid.
4. Replace unbalanced chuck; replace/resharpen
cutter; use correct feed rate.
5. Replace/re-align belts with a matched set.
6. Fix/replace fan cover; replace loose/damaged fan.
7. Re-align/replace shaft, pulley set screw, and key.
8. Tighten mounting bolts; relocate/shim machine.
9. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
10. Replace.
Model G0801/G0802 (Mfd. Since 09/15)