Section 8: Service; Troubleshooting - Grizzly G0900 Owner's Manual

SECTION 8: 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. E-Stop button depressed/at fault.
not start, or
2. Incorrect power supply voltage or circuit size.
power supply
breaker
3. Cabinet door open/door safety switch at fault.
immediately
4. Power supply circuit breaker tripped or fuse
trips after
blown.
startup.
5. Overload relay has tripped/at fault.
6. Motor wires connected incorrectly.
7. Start capacitor at fault.
8. Contactor not energized/at fault.
9. Wiring broken, disconnected, or corroded.
10. ON button or spindle rotation switch at fault.
11. Motor at fault.
Machine 1. Workpiece material not suitable for machine.
stalls or is
2. Feed rate/cutting speed too fast.
underpowered.
3. Machine undersized for task.
4. Workpiece crooked; fence loose or
misadjusted.
5. Belt slipping/pulleys misaligned.
6. Run capacitor at fault.
7. Contactor not energized/at fault.
8. Motor at fault.
Machine has 1. Shaper cutter at fault.
vibration or
2. Motor or component loose.
noisy operation
3. V-belt worn, loose, or pulleys misaligned.
4. Pulley loose.
5. Elevation housing loose or damaged.
6. Spindle loose, improperly installed, or
damaged.
7. Motor fan rubbing on fan cover.
8. Spindle bearings at fault.
9. Motor bearings at fault.
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Troubleshooting

Possible Solution
1. Twist E-Stop button to reset. Replace if at fault.
2. Ensure correct power supply voltage and circuit size
(Page 11).
3. Close door/replace switch.
4. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
5. Reset. Adjust/replace if at fault.
6. Correct motor wiring connection (Page 54).
7. Test/replace if at fault.
8. Test all legs for power; replace if necessary.
9. Fix broken wires or disconnected/corroded
connections.
10. Test/replace button/switch.
11. Test/repair/replace.
1. Only cut wood /ensure moisture is below 20%.
2. Decrease feed rate/cutting speed.
3. Use correct cutter/reduce feed rate or depth of cut.
4. Straighten or replace workpiece/adjust fence (Page
27).
5. Tension/replace belt; ensure pulleys aligned (Pages
45, 52).
6. Test/repair/replace.
7. Test all legs for power; repair/replace if at fault.
8. Test/repair/replace.
1. Replace cutter.
2. Replace damaged or missing bolts/nuts or tighten if
loose.
3. Inspect/replace belt with a new one; realign pulleys if
necessary (Pages 45, 52).
4. Secure pulley on shaft (Page 52).
5. Tighten the elevation housing gibs; replace cracked
elevation housing (Page 53).
6. Tighten loose spindle, reinstall spindle ensuring mating
surfaces are clean, replace spindle if damaged.
7. Fix/replace fan cover, replace loose/damaged fan.
8. Replace spindle bearings (Page 44).
9. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
Model G0900 (Mfd. Since 03/20)