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G8749 Drum/Flap Sander
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. Switch disabling key removed.
2. Power supply switched OFF or at fault.
3. Plug/receptacle at fault/wired wrong.
4. Start capacitor at fault.
5. Motor connection wired wrong.
6. Wall circuit breaker tripped.
7. Wiring open/has high resistance.
8. Motor ON/OFF switch at fault.
9. Motor at fault.
1. Install switch disabling key.
2. Ensure power supply is ON/has correct voltage.
3. Test for good contacts; correct the wiring.
4. Test/replace if faulty.
5. Correct motor wiring connections (Page 23).
6. Ensure circuit size is correct/replace weak breaker.
7. Check/fix broken, disconnected, or corroded wires.
8. Replace switch.
9. Test/repair/replace.
Machine stalls or is
underpowered.
1. Workpiece material not suitable for
machine.
2. Motor wired incorrectly.
3. Plug/receptacle at fault.
4. Motor bearings at fault.
5. Machine undersized for task.
6. Motor overheated.
7. Motor at fault.
1. Only cut wood; ensure moisture is below 20%.
2. Wire motor correctly (Page 23).
3. Test for good contacts/correct wiring.
4. Test/repair/replace.
5. Clean/replace sandpaper; reduce feed rate/sanding
depth.
6. Clean motor, let cool, and reduce workload.
7. Test/repair/replace.
Machine has
vibration or noisy
operation.
1. Motor or component loose.
2. Incorrectly mounted to workbench.
3. Motor mount bolts loose/broken.
4. Motor bearings at fault.
1. Inspect/replace damaged bolts/nuts, and re-tighten
with thread locking fluid.
2. Shim/tighten mounting hardware.
3. Tighten/replace.
4. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.