Hoover has been manufacturing vacuums for decades. Like most vacuums, Hoover uprights use a brush roller in the front of the vacuum to help suck up dirt and debris. The brush roller is connected to a motor pulley by a rubber. Over time this belt can become worn and even break. To save you the expense of taking the vacuum to a repair service, Hoover makes the belt user-replaceable.
Unplug your Hoover from the electrical socket. Remove the hose and attachments tools. This isn't necessary, but it will keep them from getting in your way when replacing the belt.
Lay the vacuum on the floor. Turn it over so the bottom side is facing up. You should see the brush roll at the end of the vacuum's head piece.
Remove the brush roll cover. If you have a newer Hoover the brush roll cover is held in place by two locking latches. Rotate the upper latch counter-clockwise and slide the lower latch to the unlocked position to remove the cover. If you have an older Hoover, the cover is likely held in place by two or three Phillips screws. Remove the screws and lift off the cover.
Lift the brush roll out of its end sockets and set it aside. Remove the broken belt.
Loop one end of the new belt over the motor shaft. The motor shaft is a metal rod a few inches above the brush roll area, on the left side of the vacuum. Pull the belt through the belt guide just below the motor shaft. Make sure the lettering on the belt is facing outward.
Loop the other end of the belt over the brush roll. There is a smooth area of the brush roll, on the left side, without bristles. This is the belt area. Slide the brush roll back into the end sockets. You will have to stretch the belt to make the brush roll fit.
Hold the brush roll in place and replace the brush roll cover. Once the cover is in place, rotate the brush roll a few times to line up the belt.
Avoid vacuuming large pieces of debris as they can cause a jam in the brush roll and break your belt. Clean your brush roll frequently to further avoid jams.