Model G0458Z (Mfd. Since 7/19)
-29-
SECTION 7: SERVICE
Troubleshooting
Motor & Electrical
Symptom Possible Cause Possible Solution
Machine does
not start or a
breaker trips.
1. Switch disabling key removed.
2. Incorrect power supply voltage or
circuit size.
3. Machine circuit breaker tripped.
4. Variable speed dial at fault.
5. Start capacitor at fault.
6. Motor wires connected incorrectly.
7. Power supply circuit breaker tripped or fuse
blown.
8. Centrifugal switch/contact points is at fault.
9. Wiring open/has high resistance.
10. Motor at fault.
1. Install switch disabling key.
2. Ensure correct power supply voltage and circuit size.
3. Reset circuit breaker on switch.
4. Test/repair if at fault.
5. Test/replace if at fault.
6. Correct motor wiring connections (Page 41).
7. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
8. Test/repair/replace.
9. Check/fix broken, disconnected, or corroded wires.
10. Test/repair/replace.
Machine
stalls or is
underpowered.
1. Workpiece material is not suitable for
machine.
2. Feed rate/cutting speed too fast.
3. Machine undersized for task.
4. V-belt is slipping.
5. Plug or receptacle at fault.
6. Run capacitor at fault.
7. Motor bearings at fault.
8. Motor overheated, tripping machine circuit
breaker.
9. Centrifugal switch at fault.
10. Motor is at fault.
1. Only sand wood; ensure moisture is below 20% and
there are no foreign materials in the workpiece.
2. Decrease feed rate/cutting speed.
3. Clean/replace sandpaper; reduce feed rate/sanding
depth.
4. Replace bad belt, align pulleys, and re-tension V-belt
(Pages 31 & 32).
5. Test for good contacts/correct wiring.
6. Test/repair/replace.
7. Test/repair/replace.
8. Clean motor/let cool, and reduce workload. Reset
breaker. Test/repair/replace.
9. Test/replace.
10. Test/repair/replace.
Machine has
vibration or
noisy operation.
1. Machine undersized for task.
2. Motor or component loose.
3. V-belt is worn, loose, or misaligned.
4. Pulley loose.
5. Motor fan rubbing on fan cover.
6. Motor mount loose/broken.
7. Motor bearings at fault.
1. Reduce feed rate/sanding depth.
2. Inspect/replace damaged bolts/nuts, and re-tighten
with thread-locking fluid.
3. Inspect/replace belt; realign pulleys (Pages 31 & 32).
4. Realign/replace shaft, pulley, set screw, and key.
5. Replace dented fan cover/damaged fan.
6. Tighten/replace.
7. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
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.
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