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G0612 6" Jointer
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
Motor and Electrical
Symptom Possible Cause Possible Solution
Machine does not
start or a breaker
trips.
1. Safety key removed from ON/OFF switch,
2. Plug/receptacle is at fault or wired incor
-
rectly.
3. Power supply is at fault/switched OFF.
4. Lockout key is at fault.
5. Motor brushes are at fault.
6. Motor ON/OFF switch is at fault.
7. Wiring is open/has high resistance.
8. Motor is at fault.
1. Replace safety key.
2. Test for good contacts; correct the wiring.
3. Ensure hot lines have correct voltage on all legs and
main power supply is switched ON.
4. Install/replace lockout key; replace switch.
5. Remove/replace brushes.
6. Replace faulty ON/OFF switch.
7. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
8. Test/repair/replace.
Machine stalls or is
underpowered.
1. Wrong workpiece material (wood).
2. Cutterhead belt slipping.
3. Plug/receptacle is at fault.
4. Motor brushes are at fault.
5. Motor bearings are at fault.
6. Machine is undersized for the task.
7. Knives dull, feed rate is too fast depth of cut
too great.
8. Motor has overheated.
9. Motor is at fault.
1. Use wood with correct moisture content, without
glues, and little pitch/resins.
2. Replace cutterhead belt and re-tension.
3. Test for good contacts; correct the wiring.
4. Remove/replace brushes.
5. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
6. Stop operation.
7. Use sharp knives; reduce feed rate/depth of cut.
8. Clean off motor, let cool, and reduce workload.
9. Test/repair/replace.
Machine has
vibration or noisy
operation.
1. Motor or component is loose.
2. Knife blades, clamp or jack screws are at
fault.
3. Belts worn or loose.
4. Motor fan is rubbing on fan cover.
5. Loose mounting bolts.
6. Blade is at fault.
1. Inspect/replace stripped or damaged bolts/nuts, and
re-tighten with thread locking fluid.
2. Resharpen/replace knives as required; set knife
alignment correctly
.
3. Inspect/replace belts with a new ones.
4. Replace dented fan cover; replace loose/damaged
fan.
5. Replace/tighten as required.
6. Replace warped, bent, or twisted blade; resharpen
dull blade.
Troubleshooting