If you notice the part in your picture overheated. These parts are not usually prone to failure and have only replaced them very seldom in my over 50 years in repairing Lux vacuums.
1999) Hoover Windtunnel Self Propelled Premium U6445-900
Vacuum may not be worth fixing. Sounds like the sparking in the motor is probably the commutator bad or going bad. The V Belt slipping needs both belts changed . By the picture the brush is worn out. The Power Drive needs service and...
Pn 2 shuts down.
You say the PN2 runs fine ? Did you ever think it might be a defective circuit breaker?
Electrolux had a run of defective breakers around the time of the PN2. Try to swap it out for a new one and that might do the trick !
Silverado handle
I worked at Electrolux on LI when the Silverado was introduced. The first model came with a two piece handle which looked similar to a Super J one piece handle . Because of it's unpopularity it was replaced early on with the more common two piece Olympia One Model. It was...
Silverado Motor
The original silverado used the same Super J / Olympia One Motor. With the introduction of the Diamond Jubilee in Oct 1983 for the 50th ann. (Similar to cars being introduced the Oct before for next years model)and October being a traditional "Drive Month" for Electrolux...
Model CB Dust Bag and filter
I have had used a dacron Never clog filter underneath the regular CB cloth filter which works quite well. I also have found that the Mastercraft Paper Bag #4464 Fits on the neck inside the stainless steel drum. It is a large bag and I only have to dump it every...