Harbor Freight Tools 37822 - Manual (Page 13)

Bench Grinder For technical questions, please call 1-800-444-3353. Page 13
Troubleshooting
Problem Possible Causes Likely Solutions
Tool will not start. 1. Cord not connected.
2. No power at outlet.
3. Tool’s thermal reset breaker
tripped (if equipped).
4. Internal damage or wear. (Carbon
brushes or switch, for example.)
1. Check that cord is plugged in.
2. Check power at outlet. If outlet is
unpowered, turn off tool and check circuit
breaker. If breaker is tripped, make sure
circuit is right capacity for tool and circuit
has no other loads.
3. Turn off tool and allow to cool. Press
reset button on tool.
4. Have technician service tool.
Tool operates
slowly.
Power being reduced by long or
small diameter extension cord.
Eliminate use of extension cord. If an
extension cord is needed, use one with the
proper diameter for its length and load. See
Extension Cords in GROUNDING section.
Performance
decreases over
time.
Carbon brushes worn or damaged. Have qualified technician replace brushes.
Excessive noise or
rattling.
Internal damage or wear. (Carbon
brushes or bearings, for example.)
Have technician service tool.
Overheating. 1. Forcing machine to work too fast.
2. Blocked motor housing vents.
3. Motor being strained by long or
small diameter extension cord.
1. Allow machine to work at its own rate.
2. Wear ANSI-approved safety goggles and
NIOSH-approved dust mask/respirator
while blowing dust out of motor using
compressed air.
3. Eliminate use of extension cord. If
an extension cord is needed, use one
with the proper diameter for its length
and load. See Extension Cords in
GROUNDING section.
Follow all safety precautions whenever diagnosing or servicing the
tool. Disconnect power supply before service.