Having problems with your Hoover U6660-900 WindTunnel Bagless Upright Vacuum ?

Valve actuator, arm & spring assembly

\015 This vac had no suction when in the upright position. The rear valve arm was broken (P/N 37819048) I got a new one and can't make any sense out of how this goes back together. I understand how the mechanism is SUPPOSED to work, but the parts diagram does not show how the spring fits in. Any help or pictures of how it should be assembled?\015

Answers :

Could not find a picture of this installed, I have replaced this spring and it is hard to do. You have to put the straight prong of the spring unto the valve arm, you will see a spot for it to be at, then wind the other end of the spring around until it goes into a slot, then get it all together on the agi housing before it comes apart. Hope this makes sense.
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The two pieces(Cam and arm) are installed with the spring between them creating tension on the assembly. The tension is significant, you probably will have a difficult time trying to do it without a vice. Here is what I did. Place part 41(the cam that rubs on the vacuum housing) loosely in a vise or other stationary device that can prevent it from turning when you put tension on the spring. The solid cam on part 41 should be in the jaws, but the entire slot must be exposed so as to properly seat the spring. Place Spring, part number 40 with the bent end in the slot on part 41 such that the bent part catches under the protrusion at the end of the slot. Loosely install part 39 on part 41 (it slides inside) then catch the straight end of the spring on the lever. Carefully making sure that part 39 remains enough above part 41 that it will not catch on the corners of the raised part but close enough that the spring cannot compress around the shaft on part 39 and must compress around part 41 (this was the trickiest part) use the lever to tension the spring clockwise until the lever arm is directly opposite the cam. Push parts 39 and 41 together until they engage completely and you can release the tension. The raised square portion of part 41 will engage the lever on part 39 and prevent the spring from being released. Remove the assembly from the vise and press 39 and 41 together tightly along the center mounting hole to remove any gaps. Carefully install both pieces as an assembly on the pin that holds them to the vacuum. The pin will tend to catch part 41 as you install it pushing it free from part 39. To prevent this you should press the parts on from the center mounting hole straight on to the pin with your thumb.
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