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MAINTENANCE AND SERVICING
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Cleaning, Maintenance,
and Lubrication
1. `9M,>9(9=\8(G)9F inspect the general
condition of the tool. Check for:
• loose hardware
• misalignment or binding of moving parts
• damaged cord/electrical wiring,
• cracked or broken parts
• any other condition that may
affect its safe operation.
2. =M59>(G)9F wipe external surfaces
of the tool with clean cloth.
3. Periodically blow dust and grit out of the motor
vents using dry compressed air. Wear ANSI-
approved safety goggles and NIOSH-approved
breathing protection while doing this.
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Troubleshooting
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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. 1. Excess pressure applied to workpiece.
2. Power being reduced by long or
small diameter extension cord.
1. Decrease pressure, allow tool to do the work.
2. 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 tool to work too fast.
2. Blocked motor housing vents.
3. Motor being strained by long or
small diameter extension cord.
1. Allow tool 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.
Tool does not
grind, sand or
brush effectively.
1. Disc accessory may be loose on Spindle.
2. Disc accessory may be damaged,
worn or wrong type for the material.
1. Be sure disc accessory is of correct
dimension and Flange Arbor Nut is tight.
2. Check condition and type of disc accessory. Use
only proper type of disc accessory in good condition.
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