Saturday, January 29, 2011

Rochester Disassembly/Reassembly, Part 7

I decided it would be a good idea to test things out now that the valve and pump work.

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Reassembled the breech with the pellet trough and barrel.

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A thin o-ring.

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In the valve body groove

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Nope, not enough clearance. I could cut that groove deeper although I’m not sure whether that’s needed. The teflon tape alone seems to give a great seal between the tube and valve body.

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Things you notice only after the fact when looking at pictures after the fact – a small piece of teflon tape hanging over the front of the valve inlet face. I won’t make that mistake again.

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The parts screwed together and aligned perfectly (as witnessed by the old solder blob.)

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I decided to use one of the hammer springs and locknuts from another Rochester as the one from this gun was short…

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Have to assemble the bolt first, then the hammer…

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The bent rear sight.

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Placed loosely in a vise under the arbor press ram.

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Bent…

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Another thing I didn’t notice until I looked at the pictures – an old burr on the stamping. I’ll have to dress that.

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In place. Does it go this way or backwards? I need to dig up some pictures.

The gun is now holding air well, and I spent a half hour plinking at cans. I still need to chrony it. There’s a bit too much headspace between the pump plunger and the valve face so that the residual air pressure causes the lever to flip open. So I have to address that as well as make a new pump cup.

Getting there!

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