Section 7: Service; Troubleshooting - Grizzly G0936 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. Incorrect power supply voltage or circuit size.
not start, or
2. Power supply circuit breaker tripped or fuse
power supply
blown.
breaker
3. Motor wires connected incorrectly.
immediately
4. Start capacitor at fault.
trips after
5. Contactor not energized/at fault.
startup.
6. Centrifugal switch/contact points at fault.
7. Wiring broken, disconnected, or corroded.
8. ON/OFF switch at fault.
9. Motor or motor bearings at fault.
Machine 1. Workpiece material is unsuitable for machine.
stalls or is
2. V-belt slipping/pulley misaligned.
underpowered.
3. Motor wires connected incorrectly.
4. Pulley(s) slipping on shaft(s).
5. Machine undersized for task.
6. Run capacitor at fault.
7. Extension cord too long.
8. Contactor not energized/at fault.
9. Centrifugal switch/contact points at fault.
10. Motor or motor bearings at fault.
Machine has 1. Sanding belt not tensioned correctly.
vibration or
2. Motor or component loose.
noisy operation.
3. Broken/defective sanding belt.
4. V-belt worn, loose, pulleys misaligned, or belt
slapping cover.
5. Pulley loose.
6. Motor mount loose/broken.
7. Motor fan rubbing on fan cover.
8. Centrifugal switch.
9. Motor bearings at fault.
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Troubleshooting

Possible Solution
1. Ensure correct power supply voltage and circuit size.
2. Ensure circuit is free of shorts. Reset circuit breaker or
replace fuse.
3. Correct motor wiring connections (Page 36).
4. Test/replace if at fault.
5. Test all legs for power; repair/replace if at fault.
6. Adjust centrifugal switch/clean contact points. Replace
either if at fault.
7. Fix broken wires or disconnected/corroded
connections (Page 36).
8. Replace switch.
9. Replace motor.
1. Only sand wood/ensure moisture is below 20%.
2. Clean/replace belt (Page 27); ensure pulleys are
aligned.
3. Correct motor wiring connections (Page 36).
4. Tighten/replace loose pulley/shaft.
5. Clean (Page 24)/replace sandpaper (Page 20); reduce
workpiece pressure against belt.
6. Test/repair/replace.
7. Move machine closer to power supply; use shorter
extension cord.
8. Test all legs for power; repair/replace if at fault.
9. Adjust centrifugal switch/clean contact points. Replace
either if at fault.
10. Replace motor.
1. Correctly tension sanding belt (Page 21).
2. Replace damaged or missing bolts/nuts or tighten if
loose.
3. Replace sanding belt (Page 20).
4. Inspect/replace belt (Page 27). Realign pulleys if
necessary.
5. Secure pulley on shaft.
6. Tighten/replace.
7. Fix/replace fan cover; replace loose/damaged fan.
8. Adjust centrifugal switch. Replace if at fault.
9. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
Model G0936 (Mfd. Since 06/21)