Section 7: Service; Troubleshooting - Grizzly T28366 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. Emergency stop button depressed/at fault.
start, or power 2. Incorrect power supply voltage or circuit
supply fuse/breaker size.
trips immediately 3. Power supply circuit breaker tripped or fuse
after startup. blown.
4. Wiring open/has high resistance.
5. Start capacitor at fault.
6. Centrifugal switch/contact points at fault.
7. Start button at fault.
8. Master power switch at fault.
9. Motor at fault.
Machine stalls or is 1. Dull blade.
under powered. 2. Workpiece crooked; vise jaws are loose or
incorrectly adjusted.
3. Not enough coolant flowing onto workpiece.
4. Machine undersized for task.
5. Motor overheated.
6. Motor bearings at fault.
7. Gearbox at fault.
Machine has 1. Workpiece not properly secured in vise.
vibration or 2. Machine incorrectly mounted/resting on
noisy operation. floor, workbench, or stand.
3. Motor or component loose.
4. Motor fan rubbing on fan cover.
5. Centrifugal switch/contact points at fault.
6. Motor bearings at fault.
7. Gearbox at fault.
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Troubleshooting

Possible Solution
1. Rotate button head to reset. Replace.
2. Ensure correct power supply voltage and circuit
size.
3. Ensure circuit is sized correctly and free of shorts.
Reset breaker or replace fuse.
4. Check/fix broken, disonnected, or corroded wires.
5. Test/replace if at fault.
6. Adjust/replace centrifugal switch/contact points if
available.
7. Test/replace switch.
8. Test/replace switch.
9. Test/repair/replace.
1. Sharpen/replace blade (Page 24).
2. Straighten or replace workpiece/adjust vise jaws to
avoid workpiece binding saw blade.
3. Increase flow of coolant onto workpiece (Page 20).
4. Use correct blade for workpiece (Page 21); reduce
feed rate (Page 23); increase flow of coolant onto
workpiece (Page 20).
5. Clean motor, let cool, and reduce workload.
6. Test/repair/replace.
7. Replace broken or slipping gears.
1. Check vice, jaws, and clamping pressure (Page 27).
2. Tighten mounting bolts; relocate/shim machine.
3. Inspect/replace damaged bolts/nuts, and re-tighten
with thread-locking fluid.
4. Fix/replace fan cover; replace loose/damaged fan.
5. Test all legs for power; replace if necessary.
6. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
7. Rebuild gearbox for bad gear(s)/bearing(s).
Model T28366 (Mfd. Since 04/18)