Section 7: Service; Troubleshooting - Grizzly G0827 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. Note: Please
gather the serial number and manufacture date of your machine before calling.
Motor & Electrical
Symptom Possible Cause
Machine does not 1. Master power switch OFF or at fault.
start or a breaker
2. E-Stop Button depressed/at fault.
trips immediately
3. POWER lamp button not engaged.
upon startup.
4. Plug/receptacle at fault/wired incorrectly.
5. Incorrect power supply voltage or circuit
size.
6. Column cover limit switch disengaged or at
fault.
7. Power supply circuit breaker tripped or fuse
blown.
8. Thermal overload relay has tripped.
9. Motor wires connected incorrectly.
10. Contactor not energized/has poor contacts.
11. Spindle rotation switch at fault.
12. Motor at fault.
Machine stalls or is 1. Machine undersized for task.
underpowered.
2. Feed rate/cutting speed too fast.
3. Improper tooling or wrong workpiece
material.
4. Belt(s) slipping. Oil/grease on belt(s).
5. Motor wired incorrectly.
6. Motor overheated.
7. Pulley slipping on shaft.
8. Gearbox at fault.
9. Motor bearings at fault.
Model G0827 (Mfd. Since 11/17)

Troubleshooting

Possible Solution
1. Turn master power switch ON or replace if at fault.
2. Rotate E-Stop Button head to reset. Replace.
3. Press POWER lamp button.
4. Test for good contacts; correct wiring.
5. Ensure correct power supply voltage and circuit
size.
6. Close cover to engage switch; replace if at fault.
7. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
8. Reset; adjust trip load dial if necessary; replace.
9. Correct motor wiring connections.
10. Test all legs for power; replace if necessary.
11. Test/replace switch.
12. Test/repair/replace.
1. Use correct cutter/bit; reduce feed rate; reduce
spindle RPM; use coolant if possible.
2. Decrease feed rate/cutting speed.
3. Use proper cutting tools and workpiece materials.
4. Tension/replace belt(s) (Page 53); clean belt(s) of
any oil/grease.
5. Wire motor correctly (Page 69).
6. Clean motor, let cool, and reduce workload.
7. Replace loose pulley.
8. Select appropriate gear ratio; replace broken or
slipping gears.
9. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
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