Monday, October 4, 2010

Gamo PT-80 Disassembly, Part 5

Last post…

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The valve assembly removed.

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Detail of the piercing clamp screw. The square nut is captured by the grip frame.

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The valve snaps out of the strap.

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The mostly removed (by a previous owner) CO2 seal.

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Hmmm… none of my other tools fit.

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1/16” thick cold rolled steel…

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Fancy tool…

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Unscrewed.

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Seal and valve body screw.

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It’s probably a flat seal that deformed to fit.

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Why not another pic? Odd that it came out looking orange, it’s redder in real life.

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The valve stem. Seals against the red seal, when it’s knocked open gas flows from within the valve chamber, through the three radial holes and down through the valve stem.

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A pretty stout return spring.

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There were washers and a teflon (I’m assuming it’s teflon, could be anything) seal.

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Other end showing the teflon seal.

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The washers were a stack of 3.

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I can’t figure out how to get that brass ring out. You can see a gap between the bottom and the ring where the seal goes. I think that the edges of the valve assembly were staked over it to retain it. Likewise I think the piercing pin was a press fit. So I’ll leave it. A new seal should snap into place if I make it the correct thickness and diameter.

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What have I done? Good thing I took pictures. I'll work on getting it resealed soon.

5 comments:

marcello said...

salve mi trovo in italia e possiedo una pt80 mi potresti dire se si puo e come fare per aumentare un po la potenza grazie.la mia mail lino-marcellino@tiscali.it

derrick38 said...

Non è possibile aumentare il potere. spiacente

chihshuhuang said...

Hi,
Do you make a custom made valve for PT-80 that will increase the power? I would like to buy one if you are willing to sell it.Thanks
chihshuhuang@gmail.com

Francesco Porreca said...

Non riesco più a rimontare la mia gamo pt 80

Francesco Porreca said...

Non riesco più a rimontare la mia gamo pt 80,avete una guida?