[Rob Moore]

How do I disassemble a marlin/glenfield model 20 bolt to replace the firing pin?

 

[Rob Moore]

I have removed the bolt with no problem. I ordered a new firing pin because I am getting some light strikes on the ammo. about 1 in 5 shells will not fire and show light firing pin strikes. The ammo is not the problem since it shoots in my other guns. According to the diagram, it looks like pin number 5 has to be removed. I have the right pin punches and armorers block but the pin will not budge. The schematic shows the pin being inserted from the right side so I have tried removing it from the left side. since that didn't work, I tried removing it from the right side also. same results. Some bolts just pull apart and are not pinned. Maybe I just need more force with the hammer on the punch but I don't want to damage anything.
I very much appreciate your reply to my request Patrick. Any additional help will be greatly appreciated. Thanks again.

Rob

 

[Rob Moore]

Hey Patrick,
I used a bigger hammer and got the pin out of the bolt. I removed the firing pin and related pieces and cleaned everything. While putting all of it back together, I discovered the new firing pin is 40 thousands too short. It will not protrude from the bolt face. Since I had cleaned up the grease and crud that was around the firing pin and channel, I put the old firing pin back in the bolt and reassembled it. It looks like the firing pin protrudes just right. I'll take it to the range tonight and give it a try. Thanks again for your input.

Rob

 

[Rob Moore]

Beautiful work and beautiful guns! After test firing the rifle last night, it still has the same problem. It looks like the firing pin protruds far enough. I may need a heavier main spring. One is on order.

 

[Rob Moore]

will do. thanks