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

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 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 02/20)

Troubleshooting

Possible Solution
1. Replace safety key.
2. Test for good contacts; correct the wiring
(Page 36).
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 (Page 34).
6. Replace faulty ON/OFF switch.
7. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary
(Page 36).
8. Test/repair/replace.
1. Use wood with correct moisture content, without
glues, and little pitch/resins (Page 21).
2. Re-tension or replace cutterhead belt (Page 33).
3. Test for good contacts; correct the wiring
(Page 36).
4. Remove/replace brushes (Page 34).
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 (Page 21).
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 (Page 35)
3. Inspect/replace belts with a new ones (Page 33)
4. Replace dented fan cover; replace loose/damaged
fan.
5. Replace/tighten as required.
6. Replace warped, bent, or twisted blade; resharpen
dull blade (Page 35).
.
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