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Old 10-01-2010, 09:54 PM   #1 (permalink)
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Sheridan Valve Assembly/cart valve dissasembly -and Other Tech Links

Valve Identification:
There are 2 types of valve assemblies used in the brass sheridan paintball guns. "Cartridge" valves and the older non-cartridge valves. The easiest way to identify your valve type is with the information stamped on the gun. "PA Series" guns use the cartridge valve and "P Series" guns use the old style / non-cartridge valve. Some early sheridans are unmarked but should also use the old style / non cartridge valve. If you're unsure, feel free to ask.



Old Style / Non-Cartridge Valve Assembly Pics
If you have this style valve, you will need a valve tool to remove it. See links at the bottom for DIY valve tools / dealers.

Also, there is a lead seal between the valve guide and the valve nut. It doesn't do much and does not need to be put back in the gun. Most people just throw it away.











Cartridge Valve Assembly Pics
That's not a stock sheridan valve spring so don't expect yours to look like that.

Also, a side note is that prior to taking the valve apart I'd suggest scribing a line down it or using a sharpie to mark it so you know it's aligned properly when you put it back together.





















Other Tech Info / Links
Sheridan Recognition Guides:
VM68.com: Sheridan Recognition Guide
PG / PGP evolution

Some Disassembly Scans
http://www.mcarterbrown.com/forums/s...ml#post1851437

You can look up pictures / details scans / manuals on Vintage Rex
VintageRex.com | PMI - Sheridan

Some manuals are also available in the MCB manuals
MCB's Paintball Library - Paintball Gun Manuals sorted by Manufacturer

Thread with links to archives of PGPOG
http://www.mcarterbrown.com/forums/s...sheridans.html

Sheridan CAD / part Drawings
http://www.mcarterbrown.com/forums/s...ml#post1477309
http://www.mcarterbrown.com/forums/s...ml#post1480377

Performance Tuning Thread
non-PPS Performance tuning

Valve Tool:
Valve tool, PPS/Crosman/Sheridan [SHER059] - $19.00 : Palmers Pursuit Shop, Where Custom Still Means Something
Sheridan Seal Kits, Valve Tools, Springs, Pump Arms and Misc Parts
Sheridan Products F/S

DIY Valve Tools
DIY Valve Tool
How to: make a sheridan valve tool - Special Ops Paintball
Measurements - valve tool dimensions


Wood Stock Refinishing Thread
Stock refinish questions.


...


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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Last edited by Mar; 01-10-2016 at 06:23 PM.
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Old 10-01-2010, 09:56 PM   #2 (permalink)
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Old 12-06-2010, 09:29 PM   #3 (permalink)
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Thanks! Been looking for pictures of that pulled apart.

Now, between picture 2 & 3 to get the pierce rod out... how do you unscrew that piece?
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Old 12-06-2010, 09:39 PM   #4 (permalink)
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I carefully filed some flats on mine to be able to use an open-ended wrench...
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Old 12-06-2010, 10:11 PM   #5 (permalink)
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Quote:
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Thanks! Been looking for pictures of that pulled apart.

Now, between picture 2 & 3 to get the pierce rod out... how do you unscrew that piece?
I used a rod in the exhaust hole and careful used of a padded vise grip on the cap portion (not the threads).
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Old 01-10-2011, 04:11 PM   #6 (permalink)
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When assembled are the holes supposed to be at a 90* angle with each other it at a 180*
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Old 01-10-2011, 04:34 PM   #7 (permalink)
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180. That alignment is pretty critical. The threaded hole for the front grip frame screw should be on the "bottom" while the valve output hole needs to be on the "top".

You do bring up a good point as well. While they should be in the right spot when the valve is tightened down it might be a good idea to put some alignment marks on the valve pieces before taking it apart. A line all the way down the valve would do the trick.
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Old 01-10-2011, 04:52 PM   #8 (permalink)
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Ok MaD, what are the o-ring sizes?

Do my research for me.
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Old 01-10-2011, 09:00 PM   #9 (permalink)
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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
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Old 01-10-2011, 09:06 PM   #10 (permalink)
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what do you mean by 90s, one hole is on top and one is on the side?
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