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 PGP FAQ on the PGPOG also good for all brass Sheridans Sheridan CAD / part Drawings Anyone have measurements for Sheridans? Anyone have measurements for Sheridans? 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.