Section 7: Service; Troubleshooting - Grizzly G0458ZX 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
1. Switch disabling key removed.
Machine does
not start, or 2. Machine circuit breaker tripped.
power supply
3. Circuit board fuse blown.
breaker
4. Incorrect power supply voltage or circuit size.
immediately
5. Motor speed potentiometer at fault.
trips after
6. Power supply circuit breaker tripped or fuse
startup.
blown.
7. Motor wires connected incorrectly.
8. Start capacitor at fault.
9. Centrifugal switch/contact points is at fault.
10. Wiring broken, disconnected, or broken.
11. Motor brushes worn out.
12. ON/OFF or circuit breaker switch at fault.
13. Circuit board at fault.
14. Motor or motor bearings at fault.
1. Workpiece material is unsuitable for
Machine
stalls or is machine.
underpowered.
2. Sanding depth of cut too much or feed rate
too high.
3. Motor speed potentiometer at fault.
4. V-belt slipping/pulleys misaligned.
5. Motor wires connected incorrectly.
6. Motor brushes worn out.
7. Pulley slipping on shaft.
8. Machine undersized for task.
9. Motor overheated, tripping machine circuit
breaker.
10. Run capacitor at fault.
11. Extension cord too long.
12. Centrifugal switch/contact points at fault.
13. Motor or motor bearings at fault.
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Troubleshooting

Possible Solution
1. Install switch disabling key.
2. Reset circuit breaker on switch.
3. Replace fuse/ensure no shorts.
4. Ensure correct power supply voltage and circuit size.
5. Test/repair if at fault.
6. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
7. Correct motor wiring connections (Page 43).
8. Test/repair if at fault.
9. Test/repair/replace.
10. Fix broken wires or disconnected/corroded
connections.
11. Replace motor brushes (Page 41).
12. Replace switch/circuit breaker.
13. Test/replace if at fault.
14. Replace motor.
1. Only sand wood; ensure moisture is below 20% and
there are no foreign materials in the workpiece.
2. Reduce depth of cut (Page 21) or decrease feed
rate (Page 22).
3. Test/repair if at fault.
4. Tension (Page 33)/replace V-belt (Page 34);
ensure pulleys are aligned (Page 34).
5. Correct motor wire connections.
6. Replace motor brushes (Page 41).
7. Tighten loose pulley.
8. Clean/replace sandpaper (Page 28); decrease feed
rate (Page 22)/reduce depth of cut (Page 21).
9. Clean motor/let cool, and reduce workload. Reset
breaker. Test/repair/replace.
10. Test/repair/replace.
11. Move machine closer to power supply; use shorter
extension cord.
12. Adjust centrifugal switch/clean contact points. Replace
either if at fault.
13. Replace motor.
Model G0458ZX (Mfd. Since 04/24)