Section 8: Service; Troubleshooting - Grizzly G0771 Owner's Manual

SECTION 8: SERVICE

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.
Symptom Possible Cause
Machine does not 1. Switch disabling key not installed.
start or a breaker 2. Blown fuse.
trips. 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.
Machine stalls or is 1. Feed rate/cutting speed too fast.
underpowered. 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.
Machine has 1. Motor or component loose.
vibration or noisy
operation. 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.
Model G0771 (Mfd. Since 8/15)

Troubleshooting

Possible Solution
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/fix broken, disconnected, or corroded wires.
8. Replace switch.
9. Test/replace if faulty.
10. Test/repair/replace.
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 68).
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.
1. Inspect/replace damaged bolts/nuts, and re-tighten
with thread locking fluid.
2. Replace warped/bent blade; resharpen dull blade.
3. Tension/replace belt (Page 68).
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.
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