Section 7: Service; Troubleshooting - Grizzly T32255 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. Switch disabling key removed.
not start, or
2. Blown fuse.
power supply
3. Incorrect power supply voltage or circuit size.
breaker
4. Plug at fault/wired incorrectly.
immediately
5. Power supply circuit breaker tripped or fuse
trips after
blown.
startup.
6. Wiring broken, disconnected, or corroded.
7. ON/OFF switch at fault.
8. Circuit board at fault.
9. Motor or motor bearings at fault.
Machine 1. Machine undersized for task.
stalls or is
2. Buffing wheel too large/wide or exceeds
underpowered.
recommended wheel rating.
3. Motor overheated.
4. Circuit board at fault.
5. Motor or motor bearings at fault.
Machine has 1. Buffing wheel loose or worn.
vibration or
2. Motor or component loose.
noisy operation.
3. Incorrectly mounted to workbench.
4. Motor shaft bent.
5. Motor or motor bearings at fault.
Operation
Symptom Possible Cause
achine slows 1. Operator using too much pressure.
M
when operating.
2. RPM too low.
Poor results 1. Workpiece contains residue or contaminants.
from buffing/
polishing
2. Contaminated buffing compounds on wheel.
operation.
3. Wrong buffing compound for material.
4. Workpiece not held firmly.
5. Incorrect stroke for buffing compound/wheel/
material.
6. Incorrect type of buffing wheel for material.
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Troubleshooting

Possible Solution
1. Install switch disabling key.
2. Replace fuse/ensure no shorts.
3. Ensure correct power supply voltage and circuit size.
4. Test for good contacts; correct the wiring.
5. Ensure circuit is free of shorts. Reset circuit breaker or
replace fuse.
6. Fix broken wires or disconnected connections.
7. Replace switch.
8. Inspect/replace if at fault.
9. Replace motor.
1. Use new buffing wheel; reduce feed rate.
2. Replace with smaller wheel or reduce wheel width.
3. Clean motor, let cool, and reduce workload.
4. Test/replace circuit board.
5. Replace motor.
1. Re-install (Page 21) or replace buffing wheel.
2. Replace damaged/missing fasteners; tighten if loose.
3. Adjust feet, shim, or tighten mounting hardware.
4. Test with dial indicator and replace motor.
5. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
Possible Solution
1. Use less pressure when buffing.
2. Increase buffing wheel RPM.
1. Dirt, oil, rust, paint, or other film must be removed
chemically or with water. Dry parts before buffing.
2. DO NOT mix different compounds on same wheel.
Use separate wheel for each compound. Remove
compound with buffing wheel rake (Page 25).
3. Use correct buffing compound (Page 22).
4. Use a holding device to firmly secure workpiece.
5. Use upward stroke with heavy pressure for cutting;
downward stroke with light pressure for polishing.
6. Use correct buffing wheel (Page 20).
Model T32255 (Mfd. Since 12/20)