Section 7: Service; Troubleshooting - Grizzly T32459 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. EMERGENCY STOP button depressed/at
not start, or
fault.
power supply
2. Incorrect power supply voltage or circuit size.
breaker
immediately
3. Motor speed potentiometer at fault.
trips after
4. Power supply circuit breaker tripped or fuse
startup.
blown.
5. Wiring broken, disconnected, or corroded.
6. ON/OFF switch at fault.
7. Control box circuit board at fault.
8. Motor or motor bearings at fault.
Machine 1. Excessive workpiece pressure.
stalls or is
2. Wrong workpiece material (metal).
underpowered.
3. Control box circuit board at fault.
4. Motor speed potentiometer at fault.
5. Machine undersized for task.
6. Motor overheated.
7. Extension cord too long.
8. Motor or motor bearings at fault.
Motor speed 1. Variable-speed dial stripped.
will not display,
2. Wiring broken, disconnected, or corroded.
adjust, or is
inconsistent.
3. Motor speed potentiometer at fault.
4. Motor speed digital readout circuit board at
fault.
Machine has 1. Motor or component loose.
vibration or
noisy operation.
2. Stand feet not adjusted properly or loose.
3. Drive wheel hex bolt missing or loose.
4. Motor fan rubbing on fan cover.
5. Motor bearings at fault.
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Troubleshooting

Possible Solution
1. Rotate EMERGENCY STOP button head to reset.
Replace if at fault.
2. Ensure correct power supply voltage and circuit size
(Page 10).
3. Test/replace if at fault.
4. Ensure circuit is free of shorts. Reset circuit breaker or
replace fuse.
5. Fix broken wires or disconnected/corroded
connections (Page 36).
6. Replace switch.
7. Inspect/replace if at fault.
8. Replace motor.
1. Reduce workpiece pressure against belt.
2. Use correct type/size of metal.
3. Inspect/replace if at fault.
4. Test/replace if at fault.
5. Clean/replace belt (Page 23); reduce feed rate/
sanding depth.
6. Clean motor, let cool, and reduce workload.
7. Move machine closer to power supply; use shorter
extension cord.
8. Replace motor.
1. Replace dial.
2. Fix broken wires or disconnected/corroded
connections (Page 36).
3. Test/replace if at fault.
4. Inspect/replace if at fault.
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Adjust stand feet to stabilize machine or tighten if
loose.
3. Inspect drive wheel. Replace or tighten if necessary.
4. Fix/replace fan cover; replace loose/damaged fan.
5. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
Model T32459 (Mfd. Since 03/23)