Grizzly POLAR BEAR G0453P - Manual (Page 41)

-31- Model G0453Z/G0454Z (Mfg. 1/09+)
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 7: SERvICE
Troubleshooting
Motor & Electrical
symptom possible Cause possible solution
Machine does not
start or a breaker
trips. 1. stop push-button engaged/faulty.
2. power supply switched oFF or at fault.
3. thermal overload relay has tripped.
4. Wall circuit breaker tripped.
5. plug/receptacle at fault/wired wrong.
6. Motor connection wired wrong.
7. Contactor not energized/has poor contacts.
8. Wiring open/has high resistance.
9. on/oFF switch at fault.
10. start capacitor at fault.
11. Centrifugal switch at fault.
12. Motor at fault. 1. rotate button to reset/replace it.
2. Ensure power supply is on/has correct voltage.
3. reset; adjust trip load dial if necessary; replace.
4. Ensure circuit size is correct/replace weak breaker.
5. test for good contacts; correct the wiring.
6. Correct motor wiring connections (
Pages 44–45).
7. test all legs for power/replace if faulty.
8. Check/fix broken, disconnected, or corroded wires.
9. replace switch.
10. test/replace if faulty.
11. Adjust/replace centrifugal switch.
12. test/repair/replace.
Machine stalls or is
underpowered. 1. Feed rate too fast.
2. Workpiece material not suitable.
3. dust collection ducting problem.
4. Motor overheated.
5. Machine undersized for task.
6. V-belt(s) slipping.
7. Motor wired incorrectly.
8. plug/receptacle at fault.
9. run capacitor at fault.
10. pulley/sprocket slipping on shaft.
11. Motor bearings at fault.
12. Contactor not energized/has poor contacts.
13. Motor at fault.
14. Centrifugal switch at fault.
1. decrease feed rate.
2. only cut wood/ensure moisture is below 20%.
3. Clear blockages, seal leaks, use smooth wall duct,
eliminate bends, close other branches.
4. Clean motor, let cool, and reduce workload.
5. use sharp blades/inserts; reduce feed rate or depth
of cut.
6. tension/replace belt(s) ( Page 35); ensure pulleys
are aligned ( Page 36).
7. Wire motor correctly ( Pages 44–45).
8. test for good contacts/correct wiring.
9. test/repair/replace.
10. replace loose pulley/shaft.
11. test/repair/replace.
12. test all legs for power/replace if faulty.
13. test/repair/replace.
14. Adjust/replace centrifugal switch.
Machine has
vibration or noisy
operation. 1. Belts slapping cover.
2. V-belt(s) worn or loose.
3. pulley loose.
4. Motor mount loose/broken. 1. replace/realign belts with a matched set.
2. inspect/replace belts with a new matched set.
3. realign/replace shaft, pulley, setscrew, and key.
4. tighten/replace.