Model 64 yoke to frame fit

[automan71]

Was recently inspecting a police trade in model 64. Timing, lockup and end shake seemed to be good. There was very little movement between frame and yoke when cylinder was closed or open all of the way. However, when open, about 1/2 way, I noticed a little more play between the yoke and frame (where it pivots). Is this something to be concerned about? If so, what would be the remedy?

Hope I used the correct terms...still learning! Lol

Thanks in advance

[Protocall_Design]

I would have no concerns. This is related to the groove around the end of the crane where the front sideplate screw holds the crane to the gun. There is probably some wear in the back side of the groove in the middle of the swingout travel. This could be remedied by recutting the groove to a straight line again and fitting a screw with a bigger bottom end.

[automan71]

Toolguy....thank you!

[armorer951]

The factory repair is to peen the button on the yoke stem to bear on the pilot on the end of the yoke screw. There should be contact between these two surfaces during the full arc of movement the yoke is allowed during opening and closing.

Normal wear an tear can cause some gauge to develope on the interface between the yoke button and the screw. Although some gauge is needed for movement of the aasy in and out of the gun, the critical thing is that there is no yoke end shake when the assy is closed and locked in place, and when the yoke/sideplate screw is properly tightened.

The newer, redesigned yoke stems employ a spring driven plunger in the yoke screw that keeps, or is supposed to keep, the yoke/cylinder assy in the correct, fully rearward position both during opening and closing, and while the cylinder is locked in the frame.

[Gunsnwater]

Some used revolvers just need the yoke screw tightened, and the hammer spring screw also.

[gwpercle]

I just looked at my two 38's (one is a model 64), with the cylinders 1/2 way out , there is a little more play than when the cylinders are fully opened or fully closed. It's normal , don't worry about it.
Make sure all the screws are snug, use a gunsmith screw driver that fit the slot or you will bugger the head.
I've owned these guns for years and never even noticed they did this, but if you look at the cylinder , open and close it , the movement is from a built in tolerance , I thinking to prevent binding from fired powder residue.
Gary