Very cool thread Louis. Have you down loaded the engineering drawings that are online? As you pointed out, it looks like you'd need a torch to open up the compression assembly. This may be a question for UJ, but that valve cage sub assembly calls out soldered joints. I don't know if using a torch could otherwise loosen those joints. I asked UJ about this assembly and he said it's not hard to solder them for repair work so that's good to know.I've enjoyed seeing your progress. Thanks
Louis I don't know if you've seen this thread on another forum so please excuse me if you have. There's some really good information regarding the A & B.The prevailing thought was that the valve cage would be destroyed when taking the compression chamber apart. UJ provided some important feedback that this was just unfounded and he had taken several of these units apart and if and when the cages were damaged it wasn't a difficult repair.I hope this link is useful.https://www.tapatalk.com/groups/americanvintageairguns/sheridan-super-grade-drawings-t6640.html
Very good work Louis. Soooo glad the previous owner went the ptfe route.I’m curious what the spring and ball dimensions are; especially the spring. Will you be replacing or using a lapping compound on the seals?Can’t thank you enough for sharing. You ain’t scared!
The first picture of the vice grips made my stomach flip until I saw the one below with the collar. With the average age of our member that picture could really thing the ranks with all the first glance heart attacks. Living local to Mac1 I have had the opportunity to look over a fair number of these over the years. They are incredibly beautiful in person. Glad to see this one on the mend.
The original valve 'seat' (nylon seal) had a straight 60 degree chamfer to face against the ball - factory drawing below. This would give a line-contact rather than two spherical surfaces trying to mate against each other and may have a better chance of holding air. The same principle of limited contact area was used in other guns from old air-canes to the Walther LP-3.Don R.