Friday, January 21, 2011

Rochester Disassembly/Reassembly, Part 6

With the valve resealed I had to turn attention to the pump plunger.

01211101

Nasty.

01211102

A reader sent this trick of using snap ring pliers as a spanner.

01211103

Unscrewed easily.

01211104

Nut, leather pump cup and steel washer in the bottom of the cup.

01211105

You can see that a bit of the leather cup stuck to the brass…

01211106

A new Crosman pump cup will do the job and the height of the cup is similar.

01211107

Drilling.

01211108

Checking depth as I bore out the rubber cone.

01211109

Cutting off the cup.

01211110

Fits fine. I need to make another one with a slightly thinner bottom though as tightening down the nut causes the cup to expand a little too much. With the nut just snug it’s fine.

01211111

Temporarily reassembled for testing. I sealed the tube to the valve body with teflon plumbers tape. It’s been holding air for days now, which is a good thing. I’m going to use an o-ring and some teflon tape for the final seal.

No comments:

Post a Comment