Sparks in the el. motor of Electrolux Canister.

How old? If fairly new you should not need brushes, bad brushes would probably not allow the vacuum to run at all. Last time you changed filter? Sounds like the cover to the filter is not closing well enough. There's also possibility you have a clog in the wand or hose.

That problem have 2 causes..#1 is loose electrical connection inside or on the power cord..#2 is worn out carbon brush inside of vacuum motor..

Carbon brush is the one of the most serviceable parts of a vacuum cleaner because our vacuum cleaner motor is very hard working parts so the brush inside will possible worn or not connected to the armature of rotor...

I have the same issue too. Brush motor is working and brush is turning on but the vaccum motor is not working. If I take the canister out of the frame then it wont turn on at all. Any help?

here is a website for parts for your model
http://www.partselect.com/Entry.aspx?Brand=Electrolux&Source=GAWS&Term=Electrolux+Parts

CHECK TUBE-SUMO ACTIVE ( PART NO: 1131402-02 ) CONNECTION AND NOZZLE-SUMO ACTIVE OR REPLACED (PART NO: 1131400-02)

The 6865 has a high rpm AMTEK Lamb motor, Brushes will seldom solve the problem at this stage.
Once the sparking and burning starts the conectiion between the brush and commutator is arcing and burning. If the sparks are blue, save your time.
A good service tech will run in brushes with a seating stone and a low voltage setup to allow new brushes to seat, but this is generally best accomplished on heavy duty , lower rpm motors.
IF YOUR ARMATURE IS SCRATCHY LOOKING OR WORN LIKE AN APPLE CORE,OR THE SEGMENTS ARE NOT PARALLEL IN THE SPACING YOU WILL NEED A NEW MOTOR.

Hi
The bearings are not replaceable. If the bearings have gone you need to replace the complete motor

change the belt

Sounds like motor brushes may be going. Is the vacuum cleaner old? I suggest bringing the unit in for service to replace the motor brushes. Get a quote to see if is worthwhile to fix.