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Yes you can.
If they are worn out simply replace them.
An easy job if you take your time.
Make sure you purchase the correct brushes for your machine.
If the brushes are not worn but the commutator/ brushes are arcing wildly then the field coils may be shorted.
the machine has has front drive system which indicates an electric motor
static can be caused by brushes arcing on the commutator bars
that would require a check by an electrician or technician
removing the rubber mat will do nothing as I suggested
the arcing is causing the static so it is severe
if the machine is under warranty , get it checked by a warranty technician or service agent
failing that the capacitor is fitted across the power and neutral points at the back of the power point
It could be that your brushes (PN CB440) are worn down so much that they can't make full contact with the armature or the armature (PN 619247-1) has a short in it causing excessive arcing. This would be evident by excessive burning or pitting on the commutator where the brushes make contact or missing sections of the commutator..
One can expect a small amount of arcing from a carbon brush. If one brush is arcing more than another, or if the arcing is following around the diameter of the commutator toward the other brush, the brushes need to be replaced and commutator cleaned with a commutator stone.
armatures over heat from 3 problems 1 The brushes are worn out and there is heavy arcing on the commutator bars causing excessive heat and 2 the armature is shorting out 3 the armature is touching the field shoes from worn out bushes/ bearings ( poling out). have an appliance electrician check it out.
Are the strips of the commutator smooth and flat? (Not to insult you. The part of the armature that the brushes ride on)
If they aren't, the brushes will bounce up and down. I put one end of the armature in a drill, and have a helper run the drill. The other end of the armature rests in the front bearing of the grinder head, which is fastened down. (To a bench) Then I use a medium tooth, (B astard) file to dress the commutator bars flat.
I also put medium grade sandpaper in-between the brushes, and the commutator surface to dress an arc on the brushes. (Turn the armature by hand while keeping the sandpaper in place) Brushes come with a flat surface. Putting a radius on them to fit the arc of the commutator, gives them a good contact surface to start from.
Be sure the springs are putting pressure on the brushes. Sometimes the brush mounts need to be cleaned, or the brush will not slide through the mount like it should. The brush will again, 'Dance' on the commutator. (Bounce up and down)
If the brushes are long enough, severe arcing is often CAUSED BY FAILURE of one of the windings on the armature, NOT the stator.
Either an open or shorted winding will cause this. Use an ohmeter between adjacent segments to check the resistance. The resistance can vary by say, 10%, but if you find one pair that is outside that a bunch, look for broken wire near the commutator that you might repair, but beyond that, you usually have to replace the armature.
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