Winchester Model 12 disassembly

G.O. West · October 3, 2020, 11:08 PM

I have an old Winchester Model 12 (20 gauge) with an adjusting sleeve that I can't get to unthread from the barrel using hand pressure on the receiver extension with the sleeve held in a padded vise. (I have disengaged the adjusting sleeve lock.) Does anyone have any experience with this?

jrothWA · October 4, 2020, 05:52 PM

PM me. I have a disassembly page to send you.

Is the pump forearm all the way forward so it is clearly visible above the Adj.Sleeve?

To make adjusy=tments you'll need a "Dogbone" wrench that slip over the threaded portion of the Adj. Sl., and tightens or loosen the fit. The wrench has twow fireamrs to work on theModel 12 and the 97.

FrankenMauser · October 4, 2020, 10:03 PM

They get gummy and cruddy.
Soak and persuade (gently). Rinse and repeat.

October 3, 2020, 11:08 PM	#1
G.O. West Member Join Date: January 4, 2018 Location: British Columbia Posts: 58	Winchester Model 12 disassembly I have an old Winchester Model 12 (20 gauge) with an adjusting sleeve that I can't get to unthread from the barrel using hand pressure on the receiver extension with the sleeve held in a padded vise. (I have disengaged the adjusting sleeve lock.) Does anyone have any experience with this?

October 4, 2020, 10:03 PM	#3
FrankenMauser Senior Member Join Date: August 25, 2008 Location: In the valley above the plain Posts: 13,424	They get gummy and cruddy. Soak and persuade (gently). Rinse and repeat. __________________ Don't even try it. It's even worse than the internet would lead you to believe.

October 4, 2020, 05:52 PM	#2
jrothWA Senior Member Join Date: November 11, 2006 Posts: 2,519	PM me. I have a disassembly page to send you. Is the pump forearm all the way forward so it is clearly visible above the Adj.Sleeve? To make adjusy=tments you'll need a "Dogbone" wrench that slip over the threaded portion of the Adj. Sl., and tightens or loosen the fit. The wrench has twow fireamrs to work on theModel 12 and the 97.