Section 7: Service; Troubleshooting - Grizzly G0490W 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. STOP button depressed.
start or a breaker
2. Incorrect power supply voltage or circuit
trips immediately
size.
after startup.
3. Power supply circuit breaker tripped/fuse
blown.
4. Motor wires connected incorrectly.
5. Wiring open/has high resistance.
6. START/STOP switch at fault.
7. Start capacitor at fault.
8. Thermal overload relay has tripped.
9. Contactor not energized/has poor contacts.
10. Centrifugal switch at fault.
11. Motor at fault.
Machine stalls or is 1. Workpiece material not suitable.
underpowered.
2. Excessive feed rate.
3. Excessive depth of cut.
4. Dull knives/inserts.
5. Dust collection problem.
6. Belt slipping; oil/grease on belt.
7. Pulley loose or not properly aligned.
8. Motor overheated.
9. Plug/receptacle at fault.
10. Run capacitor at fault.
11. Contactor not energized/has poor contacts.
Machine has 1. Motor or other component loose.
vibration or noisy
operation.
2. Belt worn or loose.
3. Motor fan rubbing on fan cover.
4. Pulley loose or not properly aligned.
5. Knives/inserts at fault.
6. Cutterhead bearings at fault.
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Troubleshooting

Possible Solution
1. Rotate button head to reset.
2. Ensure correct power supply voltage and circuit
size.
3. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
4. Correct motor wiring connections.
5. Check/fix broken, disconnected, or corroded wires.
6. Replace switch.
7. Test/replace.
8. Reset; adjust trip load dial if necessary; replace.
9. Test all legs for power/replace.
10. Adjust/replace centrifugal switch if available.
11. Test/repair/replace.
1. Ensure workpiece is suitable for jointing (Page 27).
2. Reduce feed rate.
3. Reduce depth of cut.
4. Sharpen/replace knives (Page 38); rotate/replace
inserts (Page 41).
5. Clear blockages; move machine closer to dust
collector; upgrade dust collector.
6. Tension/replace belt (Page 49); clean belt; ensure
pulleys are aligned (Page 50).
7. Re-align pulleys; replace shaft key; tighten pulley
set screw.
8. Clean motor, let cool, and reduce workload.
9. Test for good contacts/correct wiring.
10. Test/repair/replace.
11. Test all legs for power/replace.
1. Inspect/replace damaged bolts/nuts, and retighten
with thread locking fluid.
2. Inspect/replace belt (Page 49).
3. Fix/replace fan cover; replace loose/damaged fan.
4. Re-align pulleys; replace shaft key; tighten pulley
set screw.
5. Resharpen/replace knives; set knife alignment/
height correctly.
6. Replace bearing(s)/realign cutterhead.
Model G0490W/G0490XW (Mfd. Since 5/16)