Crosman 140

[rsterne]

I love the old 140s.... they frequently have some beautiful wood hiding under the rather blah finish....

Bob

[Doc Sharptail]

It won't be for a while until I get to the wood and metal refinishing. I took the gun apart again tonight, and did a couple of minor replacements. The sear block spring and quad seal cup o-ring got replaced. I made up a poly tube transfer port for it. The two cemented together o-rings that were used as a seal were pretty flaked out.

The gun quit blowing air out the trigger group opening. 5 pumps now give me 460 fps. I'm still getting a velocity drop at 10 pumps- down to 430-440 fps. I'm probably going to have to think about this for a while.

Here's a look at the piston face:



And the valve face:



The valve looks just like a 13-XX valve on the front section. There's even a trigger guard screw hole on the side opposite the stock screw stud hole.

It looks like my repair options remaining are the following:

Go to a flat top piston.

Replace the valve check button and spring.

Replace the valve o-ring that goes over the threads on the body.

And replace the quad seal with a new one...

Regards,

Doc Sharptail

[SeanMP]

I've only ever seen one original.

It was similar in size and shape to the current transfer ports in 13xx,22xx but the rib in the center was thin and there was remnants of the usual flat rubber washer top and bottom.

Having said that there is no guarantee that was even "original" ...You know how it goes

I have a couple 140/1400's in for repair but they are at home and I'm on the ship, so it would be a few days before I could have a peek

[Doc Sharptail]

Thanks for the description Sean. It may be difficult coming up with a photo of an original.

I did check a SBK kit breech on it. The rear breech screw hole and transfer port holes line up, but not the front breech screw hole. There's potential there- if I want to do it. That's a decision that's going to require a bit of thought.... For the time being, I had better order in a small handful of the modern transfer ports, and make chips fly with the dremel and drill press

Regards,

Doc Sharptail