Section 7: Service; Troubleshooting - Grizzly G0812 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. Emergency stop button depressed/at fault.
start, or power
2. Stop button depressed.
supply breaker
3. Wheel cover limit switch engaged/at fault.
immediately trips
4. Blade tension limit switch engaged/at fault.
after startup.
5. Hydraulic motor, vise close, and blade start
buttons not pressed/buttons at fault.
6. Headstock not raised.
7. Incorrect power supply voltage or circuit
size.
8. Power supply circuit breaker tripped or fuse
blown.
9. Motor wires connected incorrectly.
10. Wiring open/has high resistance.
11. Motor centrifugal switch out of adjustment
or at fault.
12. Start capacitor at fault.
13. Thermal overload relay has tripped.
14. Contactor not energized/has poor contacts.
15. Motor at fault.
Machine stalls or 1. Feed rate too fast; blade speed too low.
underpowered.
2. Machine undersized for task.
3. Blade not correct for material being cut.
4. Improper workpiece material for saw/blade.
5. Blade slipping on wheels.
6. Belt slipping; oil/grease on V-belt.
7. Blade dull.
8. Motor overheated.
9. Motor wired incorrectly.
10. Pulley/sprocket slipping on shaft.
11. Contactor has poor contacts.
12. Motor at fault.
Machine has 1. Motor or component loose.
vibration or noisy
2. Blade damaged or dull.
operation.
3. V-Belt worn or loose.
4. Motor fan rubbing on fan cover.
5. Pulley loose.
Model G0812 (Mfd. Since 2/16)

Troubleshooting

Possible Solution
1. Rotate button to reset. Replace if at fault.
2. Press stop button to reset.
3. Close wheel cover/replace limit switch.
4. Properly tension blade (Page 27)/replace limit
switch.
5. Press hydraulic motor, vise close, and blade start
buttons/replace buttons if at fault.
6. Raise headstock.
7. Ensure correct power supply voltage and circuit
size.
8. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
9. Correct motor wiring connections.
10. Check/fix broken, disconnected, or corroded wires.
11. Adjust/replace.
12. Test/replace.
13. Reset; adjust trip load dial if necessary; replace.
14. Test all legs for power/replace if at fault.
15. Test/repair/replace.
1. Reduce feed rate/pressure; increase blade speed.
2. Use correct, sharp blade; reduce feed rate/
pressure; use coolant if possible.
3. Use correct blade for operation (Page 24).
4. Only cut correct material for saw blade/type.
5. Adjust blade tracking (Page 28), tension (Page 27).
6. Tension/replace belt (Page 47); clean belt.
7. Replace blade (Page 26).
8. Clean motor, let cool, reduce workload.
9. Wire motor correctly (Page 64).
10. Replace loose pulley/shaft.
11. Test all legs for power/replace if at fault.
12. Test/repair/replace.
1. Retighten/replace damaged bolts/nuts.
2. Replace blade (Page 26).
3. Inspect/replace belt (Page 47).
4. Fix/replace fan cover; replace loose/damaged fan.
5. Re-align/replace shaft, pulley, set screw, and key.
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