Grizzly G0869, Owner'S Manual, Page: 50 / 72

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Model G0869/G0870 (Mfd. Since 01/19)
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.
SECTION 8: SERVICE
Troubleshooting
Motor & Electrical
Symptom Possible Cause Possible Solution
Machine does not
start, or power
supply breaker
immediately trips
after startup. 1. Power supply circuit breaker tripped or fuse
blown.
2. Plug/receptacle at fault/wired incorrectly.
3. ON/OFF switch at fault.
4. Motor at fault.
1. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
2. Test for good contacts; correct the wiring.
3. Test/replace switch.
4. Test/repair/replace.
Machine stalls or is
underpowered. 1. Feed rate/cutting speed too fast.
2. Workpiece material unsuitable for machine.
3. Motor overheated.
4. Blade dull or incorrect for type of cut.
5. Motor brushes worn/at fault.
6. Motor at fault. 1. Decrease feed rate/cutting speed.
2. Only cut wood/ensure moisture is below 20%.
3. Clean motor/let cool, and reduce workload.
4. Use correct, sharp blade; reduce feed rate.
5. Inspect/replace motor brushes (
Page 55).
6. Test/replace.
Machine has
vibration or noisy
operation. 1. Motor or component loose.
2. Blade at fault.
3. Machine incorrectly mounted/resting on
floor/benchtop.
4. Arbor bearings at fault.
1. Inspect/replace damaged bolts/nuts, and re-tighten
with thread-locking fluid.
2. Replace warped/bent blade; resharpen dull blade.
3. Tighten mounting bolts; relocate/shim machine.
4. Replace arbor housing bearings; replace arbor.