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

SECTION 7: 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.
Motor & Electrical
Symptom Possible Cause
Machine does 1. Stop push-button engaged/faulty.
not start or a
2. Power supply switched OFF or at fault.
breaker trips.
3. Plug/receptacle at fault/wired wrong.
4. Motor connection wired wrong.
5. Thermal overload relay has tripped.
6. Wall circuit breaker tripped.
7. Contactor not energized/has poor contacts.
8. Wiring open/has high resistance.
9. Motor ON/OFF switch at fault.
10. Brake switch at fault (G9953ZX &
G9953ZXF only).
11. Motor at fault.
Machine stalls 1. Feed rate/cutting speed too fast.
or is underpowered.
2. Workpiece material not suitable for
machine.
3. Dust collection ducting problem.
4. V-belt(s) slipping.
5. Motor wired incorrectly.
6. Plug/receptacle at fault.
7. Pulley/sprocket slipping on shaft.
8. Motor bearings at fault.
9. Machine undersized for task.
10. Contactor not energized/has poor contacts.
11. Motor overheated.
12. Motor at fault.
Machine has 1. Motor or component loose.
vibration or
noisy operation.
2. Knives/gibs at fault.
3. V-belt(s) worn or loose.
4. Pulley loose.
5. Machine incorrectly mounted.
6. Motor fan rubbing on fan cover.
7. Motor bearings at fault.
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Troubleshooting

Possible Solution
1. Rotate button to reset/replace it.
2. Ensure power supply is on/has correct voltage.
3. Test for good contacts; correct the wiring.
4. Correct motor wiring connections (Page 48).
5. Reset; adjust trip load dial if necessary; replace.
6. Ensure circuit size is correct/replace weak breaker.
7. Test all legs for power/replace if faulty.
8. Check/fix broken, disconnected, or corroded wires.
9. Replace switch.
10. Inspect/replace switch.
11. Test/repair/replace.
1. Decrease feed rate/cutting speed.
2. Only cut wood/ensure moisture is below 20%.
3. Clear blockages, seal leaks, use smooth wall
duct, eliminate bends, close other branches.
4. Tension/replace belt(s); ensure pulleys are
aligned (Page 35).
5. Wire motor correctly (Page 48).
6. Test for good contacts/correct wiring.
7. Replace loose pulley/shaft.
8. Test/repair/replace.
9. Use sharp knives/inserts; reduce feed rate/
depth of cut.
10. Test all legs for power/replace if faulty.
11. Clean motor, let cool, and reduce workload.
12. Test/repair/replace.
1. Inspect/replace damaged bolts/nuts, and
re-tighten with thread locking fluid.
2. Resharpen/replace knives; set knife alignment/
height correctly.
3. Inspect/replace belts with a new matched set.
4. Realign/replace shaft, pulley, setscrew, and key.
5. Tighten mounting bolts; relocate/shim machine.
6. Fix/replace fan cover; replace loose/damaged fan.
7. Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
Extreme Series Jointer (Mfd. Since 10/20)