Section 7: Service; Troubleshooting - Grizzly G2790 Owner's Manual

SEctION 7: SERVIcE

review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel-
ops. if you need replacement parts or you are unsure of your repair skills, then feel free to call our technical
support at (570) 546-9663.
Motor & Electrical
symptom possible Cause
machine does not 1. power supply switched oFF or at fault.
start or a breaker
2. plug/receptacle at fault/wired wrong.
trips.
3. start capacitor at fault.
4. motor connection wired wrong.
5. Wall circuit breaker tripped.
6. Wiring open/has high resistance.
7. motor on/oFF switch at fault.
8. motor at fault.
machine stalls or is 1. motor wired incorrectly.
underpowered.
2. plug/receptacle at fault.
3. motor bearings at fault.
4. machine undersized for task.
5. Contactor not energized/has poor contacts.
6. motor overheated.
7. motor at fault.
machine has 1. motor or component loose.
vibration or noisy
operation.
2. grinding wheel at fault; bore hole not
round.
3. incorrectly mounted to workbench.
4. motor bearings at fault.
5. motor shaft bent.
g2790 universal Knife grinder

troubleshooting

possible solution
1. Ensure power supply is on/has correct voltage.
2. test for good contacts; correct the wiring.
3. test/replace if faulty.
4. Correct motor wiring connections (page 28).
5. Ensure circuit size is correct/replace weak breaker.
6. Check/fix broken, disconnected, or corroded wires.
7. replace switch.
8. test/repair/replace.
1. Wire motor correctly (page 28).
2. test for good contacts/correct wiring.
3. test/repair/replace.
4. use new grinding wheel; reduce the depth of cut and
feed rate.
5. test all legs for power/replace if faulty.
6. Clean motor, let cool, and reduce workload.
7. test/repair/replace.
1. inspect/replace damaged bolts/nuts, and re-tighten
with thread locking fluid.
2. dress/replace grinding wheel.
3. adjust feet, shim, or tighten mounting hardware.
4. test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
5. test with dial indicator and replace motor.
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