I have a hoover U5780 900 less than one month old. When I first got it, it was very quiet. Now, however, when I engage the carpet agitattor, it makes a raatling sound like there is something stuck inside. I took of the baseplate, and there is nothing in there. It seems like the bar is coming in contact with the housing somehow.
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Re: Agitator bar makes a rattling sound when engaged.
If you have caught anything like shoes laces in it. you will have to replace the agitator and also the v-belt. when you catch something in the machine and don't have enough time to turn it off, it can cause the v-belt to cut into the v channel that the v-belt sitts in. hope this helps
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Agitator itself just slides on splined shaft. At that age it's undoubtedly "growed" on there and isn't going to be easy to pull in all likelihood. Brute force and awkwardness are about the only tools as it's rarely possible to get any leverage in any place that will do any good and the edge of the agitator itself away from the center is generally to weak to use as a pry point, anyway. Some have a removable cap at the top that can either be unscrewed or pried out depending on the make/model -- if so, you can sometimes from that point actually see the splined shaft and get some solvent down there to help. Unfortunately, ime, the "goop" has always signified a transmission shaft seal failure and nothing less than replacing that seal will solve the problem
Likely a broken belt. Also check the agitator brush roll bearings (in either end under the end caps) for hair, strong, thread, etc. as this will make the brush roll harder to turn and wear/break belts prematurely. If all these check okay, then observe the tensioning roller that causes the V belt (runs from the idler pulley to the brush roller) to be sure it is swinging down when the handle is released to hold tension on the belt, causing it to rotate. These tensioning rollers can break, but often are locked into the "Bare Floor" setting without the user noticing. Slide the carpet brush roll selector (located on top, next to the floor height slide adjustment) back and forth and make certain it is all the way into the "Carpet" setting to allow the tensioning roller to engage. [Note: The tensioning roller is always retracted (in the neutral or off position) when the handle is in the upright position. You must release the handle to allow this tensioing assembly to engage.]
It's most likely the bushings/bearings in the beater bar (roller). The beater bar cover is fairly easy to remove -- take it off and investigate. Could be that the roller only needs lubricating on the ends. Also, check the belt to see if it's intact or damaged.
your belts need to be replaced on average every 6 months. you can find these at a vac shop or you can order them online from the company. agitator belt packet # 40201030 and the s.p. belt packet # 40201049
if the belt is more than six months old then change it even if it is not broken. then replace your filters if that doesnt work than check the hoses for a clog drop a marble down them and make sure it comes out.
You probably should have replaced the flat belt(38528035) also. But the drive belt has a idler wheel(#13) to engage it, is it riding on the belt, if not if may have jammed to one side and able to spring up against the V belt. It could have broke also.