Roblack
You may not need a new spring, just clean it. To remove the stock first remove the recoil pad. you will then need a BIG screwdriver, or better yet a small spade type wood drill with the tip ground off. This works best if you can secure the gun in a padded vise.
Unscrew the big nut in the stock cavity with the screwdriver/drill bit. Remove the nut and washer, taking note of the orientation of the dimples on the washer. The stock should now slide right off. Time to refer to the diagram I had on my earlier post. Using a large screwdriver, compress the spring by pushing on the Action Spring Plug, item 5. You can now push out the Action Spring Pin, item 6, sideways out of the tube. CAREFULLY release the pressure on the plug and allow the spring to come out of the tube. Clean, re-oil and reassemble in reverse order.
I bought an 1100 years ago that would not cycle. The rest of the gun was spotlessly clean. When I took the pin out, the recoil spring and plug would not come out of the tube. I had to push them out. When I went to put it back together, I found it was not easy to get all that spring back in. Completely solved the cycling problems. Makes me wonder if that was why the owner traded it in.
John