Problem...Breaks Hum and get Hot.

[bart]

Ok I have a new problem.....

I just changed the back right rear rotor out, and put in new break pads on both rear tires......Everything seems almost back to normal except that the breaks with the new rotor hum at around 40 MPH and only after they get a little hot......Also the whole rim and rotor is getting much hotter than the other three wheels. You can touch the rims with your bare hand, but only for a few seconds. I also noticed a burning break fluid smell at an intersection which cant be good Im sure.

Anybody have any clue as to what this problem might be? I noticed that if I apply the breaks even just a little bit the humming stops.

Are the breaks riding the rotor possibly? Or worse yet, could the bearings be dry and creating extra friction?

This same wheel has been giving me many problem since I got this vehicle, a 1982 380SEL.

Any answers would be very helpful.

Thanks,

Erik