Section 7: Service; Troubleshooting - Grizzly G0857 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 not 1. Incorrect power supply voltage/circuit size.
start or a breaker
2. Power supply circuit breaker tripped/fuse
trips immediately
blown.
after startup.
3. Motor wires connected incorrectly.
4. Wiring open/has high resistance.
5. ON/STOP switch at fault.
6. Start capacitor at fault.
7. Centrifugal switch at fault.
8. 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. Belt slipping or pulleys misaligned.
6. Dust collection blockage.
7. Motor overheated.
8. Pulley slipping on shaft.
9. Run capacitor at fault.
10. Centrifugal switch at fault.
11. Motor bearings at fault.
12. Motor at fault.
Machine has 1. Mobile base lock knobs loose or stand feet
vibration or noisy
not adjusted properly.
operation.
2. Motor or other component loose.
3. Belt worn or loose.
4. Motor fan rubbing on fan cover.
5. Pulley loose or misaligned.
6. Dull knives/inserts.
7. Cutterhead bearings at fault.
8. Centrifugal switch at fault.
9. Motor bearings at fault.
Model G0857/G0858 (Mfd. Since 07/19)

Troubleshooting

Possible Solution
1. Ensure correct power supply voltage/circuit size.
2. Ensure circuit is sized correctly and free of shorts.
Reset circuit breaker or replace fuse.
3. Correct motor wiring connections (Page 54).
4. Check/fix broken, disconnected, or corroded wires.
5. Test/replace switch.
6. Test/replace capacitor.
7. Adjust/replace centrifugal switch if available.
8. Test/repair/replace.
1. Ensure workpiece is suitable for jointing (Page 26).
2. Reduce feed rate.
3. Reduce depth of cut (Page 32).
4. Sharpen/replace knives (Page 40); rotate/replace
inserts (Page 42).
5. Tension/replace belt (Page 51); ensure pulleys are
aligned (Page 52).
6. Clear blockages, seal leaks, use smooth-wall duct,
eliminate bends, close other branches.
7. Clean motor, let cool, and reduce workload.
8. Tighten/replace loose pulley/shaft, replace shaft
key; tighten pulley set screw.
9. Test/repair/replace.
10. Adjust/replace centrifugal switch if available.
11. Test/repair/replace.
12. Test/repair/replace.
1. Tighten mobile base lock knobs or adjust stand feet
to stabilize machine.
2. Replace missing bolts/nuts, or tighten if loose.
3. Inspect/tension or replace belt (Page 51).
4. Fix/replace fan cover; replace loose/damaged fan.
5. Secure pulley on shaft or realign (Page 52).
6. Sharpen/replace knives (Page 40); rotate/replace
inserts (Page 42).
7. Replace bearing(s).
8. Adjust/replace centrifugal switch if available.
9. Test/repair/replace.
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