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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
1. Switch disabling key is removed.
not start, or
2. Incorrect power supply voltage or circuit size.
power supply
breaker
3. Plug/receptacle at fault/wired incorrectly.
immediately
4. Power supply circuit breaker tripped or fuse
trips after
blown.
startup.
5. Motor wires connected incorrectly.
6. Start capacitor at fault.
7. Centrifugal switch adjustment/contact points
at fault.
8. Wiring broken, disconnected, or corroded.
9. ON/OFF switch at fault.
10. Motor or motor bearings at fault.
Machine
1. Workpiece material unsuitable for machine.
stalls or is
underpowered.
2. Motor wires connected incorrectly.
3. Plug/receptacle at fault/wired incorrectly.
4. Machine undersized for task.
5. Motor overheated.
6. Extension cord too long.
7. Centrifugal switch/contact points at fault.
8. Motor or motor bearings at fault.
Machine has
1. Motor or component loose.
vibration or
noisy operation.
2. Machine feet not installed properly.
3. Drive roller hex nut is missing or loose.
4. Motor mount loose/broken.
5. Motor fan rubbing on fan cover.
6. Centrifugal switch needs adjustment/at fault.
7. Motor bearings at fault.
Model G0512 (Mfd. Since 12/22)
Troubleshooting
Possible Solution
1. Install switch disabling key.
2. Ensure correct power supply voltage and circuit size
(Page 11).
3. Test for good contacts; correct wiring (Page 45).
4. Ensure circuit is free of shorts. Reset circuit breaker or
replace fuse.
5. Correct motor wiring connections (Page 45).
6. Test/replace if at fault.
7. Adjust centrifugal switch/clean contact points. Replace
either if at fault.
8. Fix broken wires or disconnected/corroded
connections (Page 45).
9. Replace switch.
10. Replace motor.
1. Only sand wood/ensure moisture is below 20%
(Page 25).
2. Correct motor wiring connections (Page 45).
3. Test for good contacts/correct wiring (Page 45).
4. Clean (Page 33)/replace sandpaper (Page 26); reduce
feed rate/sanding depth.
5. Clean motor, let cool, and reduce workload.
6. Move machine closer to power supply; use shorter
extension cord (Page 12).
7. Adjust centrifugal switch/clean contact points. Replace
either if at fault.
8. Replace motor.
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Adjust machine feet to stabilize machine.
3. Replace or tighten if loose.
4. Tighten/replace.
5. Fix/replace fan cover; replace loose/damaged fan.
6. Adjust/replace if at fault.
7. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
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