Removing obstruction from vacuum motor

Most Eureka's, there are 2 or 3 screws on the top to remove, then the top cover will come off. If no screws on top. then they are on the bottom. After the top is off, the belt and brush are right there in the open. To get to the motor, that off the 2 screws on the clamp on wach side of the motor, screws that are around the motor housing and then the motor cover should pull off. If the smell is electrical, if could be a bad motor, which sells for around $75 to $90. If the smell is more like rubber, then look at the belt and brush roll. If you need more info, get the model # off of the tag.