Electrical Projects Floor polishers take most of the drudgery out of floor maintenance, but experience more wear and tear than most home appliances. In order for the appliance to work effectively the spindles, bearings, and the motor itself must receive proper maintenance. Although the mechanical operation of the floor polisher is somewhat more complex than the average for home appliances, its electrical operation amounts to a slide switch energizing a motor circuit.

If the polisher refuses to run, check the cord, switch, field, and motor lead assembly for continuity. Then examine the armature for signs of arcing. If the armature is arcing excessively across two segments of the commutator, replace it. Make sure the brushes are in contact with the commutator. Check the unit for binding and alignment by rotating the armature by hand.

Excessive noise is usually caused by the transmission. Inspect the floor brush fitting. Replace if necessary. Check the grease supply in the gearbox. Stripped or worn spindle gears are another source of noise. Check the spindle bearings and replace as needed.

If the polisher runs hot, check the commutator for signs of arcing. The armature could be shorted. Inspect the field coils; look for melted varnish and other signs of overheating. End play must be less than 0.1 inch and the armature must rotate freely. Check for high-resistance connections and dirt in the motor vents. Check all electrical connections, the field coil, and look for grease on the brush holders.




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Home > Electrical Projects > Repairs > Floor Polishers

August 28, 2008