A little background. I just bought a " shooter" grade JP Sauer drilling from Gunbroker. Got a good price because it had really bad pictures and lots of surface rust. The stock was also dull and oxidized. A few hours with 0000 steel wool and WD40 and most of the rust was gone. I also rubbed out the stock finish with the same steel wool minus the WD40 and put a few coats of oil on it. The 16 gauge barrels cleaned up well by running a worn out 12 gauge brush with a drill. The 8x57 JR .318 grove and .308 bore barrel came clean with no rust or pits. I also checked the shotgun chambers and they are 70mm. I guess some time in it's 85 year history someone had them lengthened. So much for the good news. The crown of the riffle barrel has a slight ding where dropped. They are very thin. I plan to lap it with a brass round head screw.
The reason I am posting here is because the set trigger won't set. I think either it's all gummed up from setting in a closet for years or it could be broken. I tried to find disassembly instructions on the internet but the best I found with Midway's You Tube video on taking apart a british boxlock. It showed the triggers on a separate plate where mine just has one plate.
Has anyone worked on one of these? I did manage to break the large screw loose after grinding a screwdriver to fit and soaking with Liquid Wrench for a few days. I guess I'm just worried it's going to spit parts everywhere when I pop that plate loose. I'm hoping that the triggers are left attached to the plate. Then I can clean with gun scrubber or soak in kerosene for awhile and blow off and oil. I also was thinking while trying to break that screw loose that the small trigger adjustment screw may have been messed with and turned to the point where the set trigger won't engage? Any help would be appreciated.