Section 7: Service; Troubleshooting; Motor & Electrical - Grizzly G0725 Owner's Manual

SECTION 7: SERVICE

Review the troubleshooting and 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 at (570) 546-9663.
Note: Please gather the serial number and manufacture date of your machine before calling.
Motor & Electrical
Symptom Possible Cause
Machine does not 1. Safety key removed from ON/OFF switch,
start or a breaker
2. Plug/receptacle is at fault or wired
trips.
incorrectly.
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.
Machine stalls or is 1. Wrong workpiece material.
overloaded.
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.
Machine has
1. Motor or component is loose.
vibration or noisy
.
operation
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.
Model G0725 (Mfd. Since 03/18)

Troubleshooting

Possible Solution
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.
1. Use wood with correct moisture content, without
glues, and little pitch/resins.
2. Re-tension or replace cutterhead belt.
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 and ensure stock is properly sized for
safe machine operation.
7. Use sharp knives; reduce feed rate/depth of cut.
8. Clean off motor, let cool, and reduce workload.
9. Test/repair/replace.
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.
.
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