Having problems with your Eureka Smartvac 4870 Bagged Upright Vacuum ?

My roller bar doesn't seem to be working, but I checked the belt and it appears to be fine, but a bit loose. Is this the problem? dial on front to determine heighth is also very loose and does not click anymore like it did a few months ago. Any help would be appreciated. thx.

Answers :

If the brush roller stalls when it comes into contact withthe carpet, it might be that the tensioner spring has broken off. This is adesign flaw in the Eureka4870. The symptoms are: 1) brush spins until it contacts the carpet then itstalls, 2) the brush lever for setting floor/carpet is loose and lacks a firmsetting, 3) vacuum no longer has the feel of being self-propelled on carpet. Itis not very easy to repair and I don't know if a replacement tensioner iscommercially available. To fix it yourself:
  1. Remove the base plate by the 3 Phillips screws.
  2. \012
  3. Remove the brush roller and belt.
  4. \012
  5. Remove the black accordion hose connecting the motor housing to the clear vertical riser on the side of the vacuum. Unscrew it from the riser. Then disconnect the accordion hose from its black connector that screwed into the riser. Then unscrew the Torx T-20 screw that holds the bottom of the hose into the motor base. Then draw the accordion hose out through the underside of the vacuum.
  6. \012
  7. From the underside, remove the 3 Torx T-20 screws that hold the red top cover in place. They are located between the brush roller and the two small height adjustment wheels. The middle screw holds the height adjustment knob. The other two straddle the height adjustment knob.
  8. \012
  9. Turn the vacuum upright and remove the red plastic cover. This is the most difficult step. Use a flat screwdriver to pry it loose in the hole where the accordion hose fed through. On the other side, where the foot operated upright release lever is, you will have to pry the red cover off. I broke the red plastic loop from here. But it still reseats OK.
  10. \012
  11. Still upright, remove the belt tensioner by the 5 Torx T-20 screws, including the one connecting to the slotted arm (it has a wide cylinder under the head). Before removing the piece, note that there appears to be another mounting hole like the four standard mounts. This is the anchor for the spring which applies tension to the tensioner. The other anchor point for the spring has probably broken off, and the spring might be dangling loosely or even missing.
  12. \012
  13. Remove the tensioner unit. Locate the other anchor point, which is probably a broken tab with a hole as the anchor point, broken through from the high tension of the spring. This is the aformentioned design flaw.
  14. \012
  15. Drill a new hole near the broken tab. I drilled two, at right angles to each other. Drill small holes so as to not weaken the remaining plastic. I drilled ~1 mm. Holes should be between the two anchor points so as to not make the spring stretch longer than the original. Plus, a longer anchor point will interfere with the butting of the plastic edge when in the stretched position. If the spring is already lost then use a replacement that is ~1 inch long (total length) with hooks at each end.
  16. \012
  17. Reassemble the tensioner device. Check the operation of the tensioner lever to ensure smooth, firm locking.
  18. \012
  19. Reassemble the red plastic cover (3 screws including the height adjustment knob).
  20. \012
  21. Reassemble the accordion hose, brush roller, belt, and base plate.
\012It now works as good as it every did. I will next be seeking a replacement tensioner device from Eureka or a shop, since Isuspect this modification may eventually weaken and break. The plastic springanchor points are definitely a poor design by Eureka.
Please be sure the roller turns freely. You might want to remove it and clean any debris found on or around it. At each end you will see a holder that keeps the roller brush in the frame of the vacuum. These parts should turn freely at the end of the roller brush. If they do not, add a bit of WD40 and turn by hand until they are moving without resistance. \015\012Might also be a good idea to put on new belts as well.\015\012
Repair Help & Product Troubleshooting for Eureka Smartvac 4870 Bagged Upright Vacuum

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