Fitting a yoke?

[duman444]

I have a 28 no dash I bought used that was aftermarket nickel plated. Whoever plated it got some plating on the yoke bearing surface the cylinder rides upon. I have removed most of the plating, but cylinder still has a drag on 2 charge holes and the extractor also sticks in this area. I am afraid if I try to remove any more plating/underlying metal, I am going to end up changing the bearing surface geometry and make the problem worse. Also, the nickel plating has flaked at the front of the yoke, so a new yoke would also improve the look. Only flaking of the whole gun. Another thing I think is strange is that if the extractor rod is only finger tight, the cylinder rotates freely with no drag. Once it's tightened drag rears its ugly head. Checked concentricy of the extractor rod and it only had a .001 runout.

I have seen for sale an aftermarket plated cylinder and yoke for a 28 for $100. The original 28 has a flat groove with a flat tip yoke screw in frame unlike the more recent V groove with a screw with a cone tip.

How hard is it to fit a yoke-don't need the cylinder. Any special tools needed? The gun shoots fine as is and if it's too big a job for me, I probably won't pay a smith to do it. I have a 627 8 shot and tried to move the yoke on that to see the fit and it looks like it would need some metal removed at the front of yoke to close in the 28 frame.

 

[WR Moore]

OK, since the yoke retaining screws are different for the U groove yoke and the V groove yoke, swapping one for the other isn't a good idea. The screw with the spring loaded plunger is larger. Not saying it can't be done, it's just not going to be plug and play and it's gonna cost. You'd have to alter frame and side plate to go to the larger version.

I'd have to see the items to figure out the extractor rod issue. The rod might be cocking when tightened.

 

[duman444]

I did not explain myself too clearly. The replacement yoke is from a model 28 no dash with the U groove, just like my model 28.
I think you may be on to something on the extractor rod cocking. There was excess plating on the base of the rod that I thought I had cleaned up. Rod base may need to squared on a lathe OR use the rod from the cylinder and frame that is for sales since it's from a 28 no dash and will have the RH thread like mine. Also, I looked at a parts breakdown on Numrich and they list a "gas ring" that goes inside the cylinder over the extractor. I don't have that part in my cylinder. Could this be my issue?

 

[duman444]

Should have done some research first. I see the gas ring is press fit into the cylinder and I do have that on mine.