Idiots guide to classic airgun strips (pt 1)

[ggggr]

Unscrew 2 trigger guard screws

http://i133.photobucket.com/albums/q...ff/BBS/012.jpg

Pull trigger back and turn stock anti clockwise from cylinder to unscrew

http://i133.photobucket.com/albums/q...ff/BBS/013.jpg

You can now access the mainspring

Unscrew bolt to remove cocking arm

http://i133.photobucket.com/albums/q...ff/BBS/014.jpg

remove cocking arm from cocking slot

http://i133.photobucket.com/albums/q...ff/BBS/015.jpg

You can now remove the piston assembly

BSA Pre War Break Barrel Strip.

As the pics have gone from this and I have now bought one of these guns, I thought I would add a little to this post.
Unscrew the 2 trigger guard screws and remove the trigger guard. Unscrew the barrel pivot screw and lift the cocking arm out of the slot in the cylinder to free the barrel and breech block. You can unscrew and lube the cocking arm pivot screw now if you want. There is a little pin in the breech block, that retains the barrel plunger. You can drift this out and remove/clean and lube the barrel plunger and spring. Sometimes a little block of wood helps for pushing plungers back in far enough to relocate the pin.
Unscrew the trigger block, keeping tension to stop it flying as it clears the cylinder. The mainspring and piston should now come out. The mainspring on mine had a rough end so I heated it and flatted it. I think the piston washer should be a normal leather cup washer set up with a buffer and the dimpled steel washer, held by a screw. Unfortunately, the buffer washer was missing on mine and 5 small steel washers had been used instead. This meant that the piston had been slamming into the end of the cylinder and also damaged the head of the screw that holds the washer on. The piston rod should unscrew once you have undone the little lock screw, but as mine looked fine I just cleaned the piston up. I made up a buffer washer and found a dimpled steel washer to complete the piston washer set up. Before I put the gun back together, I undid the trigger pivot screw and removed the trigger and trigger spring for cleaning and lubing. I also cleaned out the trigger housing. I find this is worth doing on the old stuff as you might have grease that could be somewhere between 70 and 100 years old!. The trigger spring is located in a hole in the trigger housing and the trigger slid back in and lined up and the pivot screw replaced.
Refit your piston and mainspring and screw the trigger block back on. When It is located, replace the trigger guard and the 2 screws. Before you replace the barrel, it is worth checking the breech seal washer as these are often old/worn and are often the cause of low power.
Locate the cocking arm in the cylinder and locate the breech block in and barrel in the breech jaws. replace the pivot pin.

This was very low in power and I suspected the breech seal, which I had left in for now just to see how much difference it would make. Once the new seal was made up and put in, the gun shot quite well. I would say it is quite a well made little plinker.