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SECTiON 7: SERviCE
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.
Motor & Electrical
symptom
possible Cause
Machine does not
1. plug/receptacle is at fault or wired
start or a breaker
incorrectly.
trips.
2. power supply is at fault/switched OFF.
3. lockout key is at fault.
4. Motor on button or on/oFF switch is at
fault.
5. Wiring is at fault.
6. Motor brushes are worn.
7. Motor is at fault.
Machine stalls or is
1. too much tool pressure.
overloaded.
2. plug/receptacle is at fault.
3. Motor bearings are at fault.
4. Motor brushes are worn.
5. Motor has overheated.
6. Motor is at fault.
Machine has
1. Motor or component is loose.
vibration or noisy
operation.
2. Motor fan is rubbing on fan cover.
3. Workpiece or center/chuck is at fault.
4. Motor bearings are at fault.
Models G0657/G0658 (Mfg. Since 5/13)
Troubleshooting
possible solution
1. test for good contacts; correct the wiring.
2. ensure hot lines have correct voltage on all legs
and main power supply is switched ON.
3. install/replace lockout key; replace switch.
4. replace faulty on button or on/oFF switch.
5. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
6. replace brushes.
7. test/repair/replace.
1. reduce tool pressure.
2. test for good contacts; correct the wiring.
3. test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
4. replace brushes.
5. Clean off motor, let cool, and reduce workload.
6. test/repair/replace.
1. inspect/replace stripped or damaged bolts/nuts, and
re-tighten with thread locking fluid.
2. replace dented fan cover; replace loose/damaged
fan.
3. Center workpiece on center/chuck or face plate;
reduce rpM; replace defective center/chuck.
4. test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
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