| Nightmare is notorious for having burrs inside the lower valve tube. Particularly where the frame and pump arm screws enter the tube. These burrs will nick the o-rings when you re-insert the valve. Solution is to wrap a piece of emery cloth around a dowel rod and sand the burrs out. Clean lower tube thuroughly after this operation. Then you can replace the o-rings and re-install the valve. The o-rings on the outside of the valve body can be found at an well stocked hardware or plumbing store. There is nothing special about them. Buna-N o-rings work just fine. Like the post above says, oil the snot out of it before re-installing the valve. Only 3 unique seals in the Nightmare, two are inside the valve body (the cup seal and the valve tube o-ring) the other unique seal is the puncture pin seal. If you need replacements for any of the seals inside valve I have them. |