Did you put a new O-ring on the emulsion tube? Towards the end there should be a small grove where a tiny O-ring slips on. The emulsion tube needs to be bumped into place. A very little amount of oil might help. The O-ring fit is tight and needs a tap to get it into its seat. How did it come out? It should have been the same process. I use a 4" long golf T to gently tap it out. It takes a little bump going that way as well.

Doug

Hoo