How to fit Ejector Rod and Center Pin

BSA1 · Sep 26, 2012

I did a search but could not find a thread on this topic. If there is one please direct it to me.

I have a Model 10-6 that I am trying to fit a new ejector rod and center pin to. I have the new correct ejector rod and center pin and have installed them.

Now the problems. First the cylinder will not close when the center pin hits the recoil shield. I have to push the center pin in before it closes.

Second when I dry fire the gun single or double action the gun becomes very difficult to cock and the cylinder is difficult to rotate.

The center pin extends past the end of the ejector rod and opens easily.

Obviously something needs a little fitting here.

DCWilson · Sep 26, 2012

Welcome to the forum. Sounds like the center pin may be a little long at both ends, but that may be a misimpression and may not be all that needs attention.

At no time should the forward end of the center pin protrude beyond the end of the ejector rod (or no more than a hair, at any rate). At maximum displacement -- when the cylinder is being opened or closed -- the end of the pin should be exactly flush with the end of the ejector rod.

At the rear of the center pin, compare the protrusion you have with the new pin to what you had with the old one, or with some other K-frame revolver entirely. I don't know why a center pin would affect cylinder rotation; that sounds like a hand or ratchet problem. Are the hand and ratchet still the ones that were in the gun in the first place?

When the cylinder is open and you push on the back end of the center pin, does the tension feel right? I am wondering if there is a spring jam of some sort with either the center pin spring or the ejector star spring. When the cylinder is open, does the cylinder spin freely and does the end of the ejector rod show absolutely no oscillation? Could be something is bent.

I'm not trying to solve your issues in one answer, but I'm hoping some further analysis will point to an underlying issue or issues.

BSA1 · Sep 26, 2012

The center pin is made by Jack First as I could not locate the correct factory center pin.

It is rough with machine marks and only slighty rounded. A little light polishing and rounding with the demel tool and some wet/dry sandpaper has improved it.

The cylinder will slide back and forth on the yoke when it is open.

Cylinder rotation seems a little smoother but is still stacking.

Center pin appears to be flush with the end of the ejector rod.

The gun is a used cop/security trade in that shows heavy holster carry. It was very difficult to open when I got it. The end of the center pin had a dimple worn in it from being opened and closed so often. I shortened it slighty to remove the dimple and that corrected the difficulty opening it. However it then had two light firing pin strikes resulting in failure to fire when shooting. Although I could not detect any endshake problems I decided to replace the center pin and ejector rod.

Internals look original and gun locks up fine.

Trial and error on the cylinder end of the center pin polishing and removing a little at a time maybe???

tputto · Sep 27, 2012

I thought of the cylinder stop lug on the left side of the frame. Does it allow too much rearward movement for the cylinder? Is it easier to close the cylinder muzzle down so that the cylinder is in its forward position?

Also, try to cock the hammer with cylinder out, pulling the opening latch to the rear. Does the mechanism operate smoothly? If so, your problem could be a bent crane. Maybe a good idea to check barrel/cyl. gap on each chamber. Having been carried a lot, your revolver may well have been dropped during its service years. If there is no difference, problem is probably somewhere in the trigger mechanism. Flushing with brake cleaner spray may help without having to open the sideplate.

BSA1 · Sep 27, 2012

A trip to a gunsmith to check the yoke/crane might be a good idea although the fit of the yoke to the frame is tight and even. Everything checks out fine with the cylinder open.

B/C gap is tighter than I like on a service gun but as near as I can tell is not hitting the rear of the barrel.

How to fit Ejector Rod and Center Pin

BSA1

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DCWilson

BSA1

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tputto

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BSA1

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