Section 7: Service; Troubleshooting - Grizzly G0949G 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 1. Master power switch in OFF position.
not start, or
2. E-Stop button depressed/at fault.
power supply
3. Blown fuse.
breaker
4. Incorrect power supply voltage or circuit size.
immediately
5. Motor speed potentiometer at fault.
trips after
6. Power supply circuit breaker tripped or fuse
startup.
blown.
7. Motor wires connected incorrectly.
8. Wiring broken, disconnected, or corroded.
9. START button at fault.
10. Circuit board at fault.
11. Motor or motor bearings at fault.
Machine 1. Feed rate/cutting speed too fast.
stalls or is 2. Improper tooling or workpiece material.
underpowered. 3. Gearbox at fault.
4. Motor circuit board at fault.
5. Motor speed potentiometer at fault.
6. Belt(s) slipping/pulley(s) misaligned.
7. Motor wired incorrectly.
8. Pulley slipping on shaft.
9. Machine undersized for task.
10. Motor overheated.
11. Extension cord too long.
12. Motor or motor bearings at fault.
Model G0949G (Mfd. Since 01/22)

Troubleshooting

Possible Solution
1. Turn master power switch to ON position.
2. Rotate E-Stop button head to reset. Replace if at fault.
3. Replace fuse/ensure no shorts.
4. Ensure correct power supply voltage and circuit size.
5. Test/replace if at fault.
6. Ensure circuit is free of shorts. Reset circuit breaker or
replace fuse.
7. Correct motor wiring connections (Page 82).
8. Fix broken wires or disconnected/corroded
connections.
9. Replace START button.
10. Inspect/replace if at fault.
11. Replace motor.
1. Decrease feed rate/cutting speed.
2. Use appropriate tooling and/or workpiece material.
3. Select appropriate gear ratio; replace broken or
slipping gears.
4. Inspect and replace if at fault.
5. Test and replace if at fault.
6. Clean/tension/replace belt(s) (Page 72); ensure
pulleys are aligned.
7. Wire motor correctly (Page 82).
8. Tighten/replace loose pulley/shaft.
9. Use sharp bits/chisels at correct angle; reduce feed
rate/depth of cut; use cutting fluid if possible.
10. Clean motor, let cool, and reduce workload.
11. Move machine closer to power supply; use shorter
extension cord.
12. Replace motor.
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