Question about Eureka Smartvac 4870 Bagged Upright Vacuum

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Eureka model 4870 belt replacement

I can't figure out how to get the belt on the motor shaft. I took the bottom of the vac off and i'm looking at a belt that I can't even get off to replace. How do I manipulate belt over shaft?

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  • gmvalentine May 03, 2008

    I have the same question....there is no gap between the end of the shaft and the side of the bottom of the vacuum to get a belt on or off.

  • bobbyhillis Jan 24, 2009

    could you please give a illustration of the area you are talking about ,i am trying to replace the belt ,without taking the machine apart,unnecessarily.

  • bobbyhillis Jan 24, 2009


    could you please give a illustration of the area you are talking about ,i am trying to replace the belt ,without taking the machine apart,unnecessarily. i have a eureka model 4870

  • susanowendea Jan 31, 2009

    I have the same problem with my 4870,  I can't figure out how to get the roller brush out in order to replace the broken drive belt.

  • 4870Sux Mar 08, 2009

    Same aggravating problem. I think some percentage of the 4870's were assembled either incorrectly or with the wrong motor, for two reasons:



    (1) Called 1-800 Cust Service # and rep had an open 4870 with her to better answer customer questions. We compared our motor shafts and she described how hers clearly had a space for an old belt to be taken off and a new one to be put on... the shafts were clearly different.



    (2) On mine, one can easily see that the shaft is of incorrect dimensions even if you can somehow get a belt on it, as the spot at which the belt is forced to sit is so off-center that it will rub (hard) against the internal housing when it's spinning... the whole reason I had to change the belt in the first place is that the old one was completely frayed on one side for having rubbbed constantly from day one of usage.



    My opinion is that someone in the Eureka factory is screwing up either with motor selection or assembly and we're the lucky suckers to get his handiwork. What happend to training and quality control? It had to be very clear to the assembler and whoever should be checking the work that the orignal belt was off-center and rubbing, Me? I'm buying Hoovers from now on.

  • 4870Sux Mar 08, 2009

    Addendum to the 4870 analysis I just gave. Turns out our daughter has pretty much the same vacuum cleaner at her apartment (didn't realize it because our 4870 Type GZX is red and her 4870 Type D-3 is charcoal).



    Opened up the 4870 D-3 and immediately saw that the end of the motor shaft is well away from the other side; you have at least 1/4 inch to take the belt off and on... at first I thought it comfirmed my theory of "the wrong motor" in my previous entry.



    But under closer examination I could see that it's the same shaft, but something clearly caused the shaft (possibly the motor itself?) to ram itself all the way against the other side of the casing. Did you notice some incident while vacuuming where something happened and then you heard screeching and smelled burning plastic?



    Sorry, those of us with the shaft that goes all the way across are actually deallng with a (probably major) motor problem. The service rep said that if it's a manufacturing defect.. which I sure think it is... a repair center will fix it for free IF YOU ARE STILL UNDER THE ONE YEAR WARRANTY. Mine's not, mine's not worth fixing, mine's still being replaced by a Hoover. Good luck.

  • Anonymous Mar 16, 2009

    Same thing - the belt won't come off because the motor shaft is solid metal. I called Eureka and they sad that there should be about a 1/2" space to the right of the pin and the belt should slide right off. Once I told the operator that there was not a space, she told me something about some part of the motor slipping out of place and the thing would have to be repaired at a shop. Nearest one - 100 miles.

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- NO WAY AROUND THE END OF THE DRIVE SHAFT TO REMOVE DAMAGED BELT.

  • Following the belt replacement instructions in the manual, I removed the three screws, took off the base plate and removed the brush roll, slipping it out of the belt.
  • Up and somewhat inside the plastic housing I could see the other end of belt going around the drive shaft.
  • But the shaft had no gap around its end to allow removal or replacement of belts. It extended from the motor completely across the space and against the plastic housing.
  • Yikes.
  • I dismantled the housing until the end of the shaft was accessible and found that the problem wasn't the shaft moving out of position.
  • The problem was that the bushing mounted on the end of the shaft for the belt to ride on had slipped over.
  • Ah HAH.
  • I applied some LokTite green threadlocking adhesive (though neither the shaft nor the bushing are threaded) to the shaft, slipped the bushing all the way onto it and put it all aside to set up.
  • Finally I reassembled the machine with a new belt in place, plugged it in, crossed my fingers and hit the power switch.
  • It worked like new! FIXT! And I had only one screw left over. It was a small one too, so I doubt if it was important...heh.
Does your machine have a slipped bushing? You may be able to fix it without taking it apart any more than for a normal belt replacement. Try using a rubber or plastic-tipped forceps or pliers move the bushing back into position. Be careful not to mar the metal as it will chew any new belt to bits in seconds. If you are able to move it, put on a few drops of LokTite, epoxy or some other adhesive to keep it in place. You may be able to avoid sending your vac to the shop for costly repairs.

Posted on Nov 30, 2009

  • juice13 Nov 17, 2010

    if you cant budge it, then remove the motor cover from the top. slide out the suction housing and pull out the motor. tap the bushing into place with a hammer and reinstall.

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There's nothing wrong with your motor. You are looking at the wrong spindle. One looks like a a half a spool of thread (chrome) and has no room around it for a belt. That's the wrong one. Look higher and you'll see another spindle a little wider than a pencil, probably marred with burned black rubber with about 1/2 inch of room for slipping the belt around it. It's hard to do, but you can make it easier using a screwdriver to poke it. Be careful not to cut the new belt with the screwdriver. Also be careful not to dislodge the little oddly shaped white felt thingies nearer the bigger spindle. They are the devil to get back in place. Be sure to remove all three screws from the cover when you begin so you can reposition the cover using the little "hooks" which go into slots. Otherwise the three holding screws will not be able to go all the way into their holes which makes the cover less secure. I had to figure this out through trial and error because the instructions on the vacuum cleaner were incomplete. Corporations don't hire engineers to help people fix their machines in the telephone. Often they are just quickly trained regular people with no experience. The assemblers did not make a mistake -- your motor did not slip out of place.

Posted on Aug 23, 2009

  • lcuellar Oct 03, 2010

    Wow, this was the key, I had been looking at the spindle and thinking my hose belonged around it, and it does not. It lies over it and I'm most grateful for this entry.

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People take only the plate where the brush is off , you do not have to take anything apart ,take the belt put it over the shaft in the back that attaches to the motor, the belt justs rides over the silver spindle,to the brush in the front of the machine. i find that works , i hope that helps other people with the same problem.

Posted on Feb 01, 2009

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Read Solution #2. This is what happened to my vacuum. This is probably the most common problem.

Posted on Dec 30, 2009

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Have you pulled the roller out? Once you pull the plate off, the roller should pop out. Then you should easily be able to get a belt on or off the motor shaft.

Posted on May 05, 2008

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