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Old 06-26-2012, 08:48 PM   #31 (permalink)
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So are you ever going to put the peirce pin/cup seal in those pictures?
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Old 03-26-2013, 08:35 PM   #32 (permalink)
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Section of the ZGP-94:

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Old 06-01-2013, 01:51 PM   #33 (permalink)
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Originally Posted by kuhn101 View Post
I have two of them and when fully tightened there and 90s should I use blue loctite to make sure it doesn't spin and just leave it a quarter turn from fully tight
I know I'm quoting an older post but figured this should be here as a just-in-case for a future owner of multiple pgps.

I had the same problem like 10 minutes ago, it's because I tore them both down for cleaning and such and mixed up valve body halves on re-assembly. swapping fronts and backs is a recipe for a headache and wasted 12 grams.

Along with making a mark down the valve body to help with assembly it will help to mark your valves "1" "2" et c. on the front and back of properly matched halves to avoid mix ups down the road.
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Old 01-12-2014, 02:43 PM   #34 (permalink)
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O-RING SIZES

old style valve= non cartridge valve.
012 for the small one & 014 the larger one
the bolt orings are 111's






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Old 01-13-2014, 11:29 PM   #35 (permalink)
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DIY NON CARTRIDGE (old style) VALVE TOOL

DIY Valve Tool







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Old 01-14-2014, 06:50 PM   #36 (permalink)
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DIY NON CARTRIDGE (old style) VALVE TOOL

DIY Valve Tool

Yeah I had linked that one up top. I will say that while it's a cheap alternative I'm not a huge fan. I'd still suggest spending a few bucks on a valve tool.... and not because I have them for sale... that was a limited thing and I won't have them soon....

Here's why.... for one, with a DIY tool you don't get the threaded valve extraction end. This is an oddball thread. Without this, you're going to be trying to jam needle nose pliers or thread something else on there probably damaging the original threads on the valve guide.

Also, while a DIY tool like that can be effective at removing the nut, you're going to have problems getting things back together. You have to put in the guts and then push against the jam nut to compress the spring and thread it in. If you don't have a "collar" on the tool to push the internals in with, you're going to either fail miserably or cross thread the jam nut. If you DO make something like the one pictured, I'd take that into account and leave some sort of collar area to help you get things back together.
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Old 02-18-2014, 03:55 PM   #37 (permalink)
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Had to replace a few valve stem seals and some wouldn't come out. Solution: heat it up with a lighter to soften the rubber and they almost come out alone.
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Old 12-05-2014, 11:04 PM   #38 (permalink)
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Cartridge Valve Rebuild (How I Do it...)

Start with one ordinary stock cart valve removed from gun.





Mark or scribe a line all the way down the length. This will make alignment easy when it's put back together.




I use the frame screw in the front hole and an allen in the back hole for leverage to unscrew the valve pieces.




Usually the nose will come off first. If not you can still use the other tricks below to help get the valve apart.




To protect the threads I wrap them up with some tape. Then I file flats on both sides of the middle piece.You don't want or need them that deep, just enough to make a spot for a wrench to grab.




Once you have the flats done, you can use an adjustable wrench and allen wrench to unscrew the valve parts.




Below is just a shot of the middle piece from the top. If you look closely you can see the flats on both sides...




Below is just a pic of the valve apart.




Pick out the rotten face seal.




Pick out the rotten inner o-ring. Note this IS just a normal o-ring and not some proprietary seal. It just changes to the weird D shape due to time and pressure.




Old ones on top, new ones below...




Toss on the new face seal




Toss on the new O-ring




Screw the nose piece back together




Put the inner o-ring on. Put in the valve / spring




Re-assemble and line your marks back up.




Note, I didn't show replacement of the rear outer o-ring. It can be done with the valve fully assembled like any other o-ring.
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Old 12-06-2014, 01:12 AM   #39 (permalink)
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What a great guide!
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Old 12-06-2014, 01:29 AM   #40 (permalink)
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Very nice. Thank you.
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