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The valve cup seal is a piece of steel that gets inserted intothe valve and has a piece of rubber attached to it along with a spring right? because when i pulled my valve out i noticed that the valve cup seal will not go into the valve and when i try and insert it the other way it slides in but gets stuck and the other end where it would not go in. should i try and lightly file the one end of the valve so that the valve cup seal will slide all the way thru?
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