Grizzly G0771Z - SECTION 8: SERVICE; Troubleshooting

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Model G0771Z (Mfd. Since 01/21)
Troubleshooting
Symptom Possible Cause Possible Solution
Machine does not
start or a breaker
trips.
1. Switch disabling key not installed.
2. Blown fuse.
3. Wall circuit breaker tripped.
4. Power supply switched OFF or at fault.
5. Plug/receptacle at fault/wired wrong.
6. Motor connection wired wrong.
7. Wiring open/has high resistance.
8. Motor ON/OFF switch at fault.
9. Start capacitor at fault.
10. Motor at fault.
1. Insert switch disabling key into ON/OFF switch.
2. Replace fuse/ensure no shorts.
3. Ensure circuit size is correct/replace weak breaker.
4. Ensure power supply is on/has correct voltage.
5. Test for good contacts; correct the wiring.
6. Correct motor wiring connections.
7. Check/xbroken,disconnected,orcorrodedwires.
8. Replace switch.
9. Test/replace if faulty.
10. Test/repair/replace.
Machine stalls or is
underpowered.
1. Feed rate/cutting speed too fast.
2. Workpiece material unsuitable for machine.
3. Workpiece crooked; fence mis-adjusted.
4. Machine undersized for task; wrong blade.
5. Run capacitor at fault.
6. Belt slipping.
7. Motor wired incorrectly.
8. Plug/receptacle at fault.
9. Pulley/sprocket slipping on shaft.
10. Motor bearings at fault.
11. Contactor not energized/has poor contacts.
12. Motor overheated.
13. Motor at fault.
1. Decrease feed rate/cutting speed.
2. Only cut wood; ensure moisture is below 20%.
3. Straighten or replace workpiece; adjust fence.
4. Use correct blade; reduce feed rate or depth of cut.
5. Test/repair/replace.
6. Tension/replace belt (Page 72).
7. Wire motor correctly.
8. Test for good contacts/correct wiring.
9. Replace loose pulley/shaft.
10. Test/repair/replace.
11. Test all legs for power/replace if faulty.
12. Clean motor, let cool, and reduce workload.
13. Test/repair/replace.
Machine has
vibration or noisy
operation.
1. Motor or component loose.
2. Blade at fault.
3. Belts worn or loose.
4. Pulley loose.
5. Motor mount loose/broken.
6. Machine incorrectly mounted.
7. Arbor pulley loose.
8. Arbor bearings at fault.
9. Motor bearings at fault.
1. Inspect/replace damaged bolts/nuts, and re-tighten
withthreadlockinguid.
2. Replace warped/bent blade; resharpen dull blade.
3. Tension/replace belt (Page 72).
4. Realign/replace shaft, pulley, setscrew, and key.
5. Tighten/replace.
6. Tighten mounting bolts; relocate/shim machine.
7. Retighten/replace arbor pulley.
8. Replace arbor housing bearings; replace arbor.
9. Test by rotating shaft; grinding/loose shaft requires
bearing replacement.
Review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel-
ops. If you need replacement parts or you are unsure of your repair skills, then feel free to call our Technical
Support at (570) 546-9663.
SECTION 8: SERVICE