[kidneythief]

The valve is surely a PITA to remove. Start by removing the grip frame and the pump handle...next there should be a two set-screws one either side of the lower tube that need totally removed. Once all those items are removed you need to get a wooden dowel of something suitable that wont mar the barrel or valve(I use a 2' section of 1/2" dowel). Insert the dowel down the barrel and give it a few whacks with a hammer and all the guts should fallout the rear of the gun.

Once you have the valve/bolt/hammer out you can remove the rear(brass) screw from the valve. This takes a special tool but you can make your own by cutting a 1/4" slot into a quarter w/ a dremel or something similar. Once removed you can pull all the guts out of the actual valve for inspection. There is one o-ring and a "thermo" style disk type cup seal. Chances are the thermo seal has gone bad....replacements are indeed very hard to find. I was having mine made by a local hydrolics company which you may be able to find locally.

If your extremely lucky it will be one of the o-rings (most likely the forward one) one the outside of the valve body...in that case a simple trip to the hardware store will yield a replacement.

Be very carefull when you are pulling and reinserting the valve...if you put even the lightest scratch in the area where the valve seals to the body you will never get the gun to seal up.

If you find yourself stumped let me know and i can take a few pics for you.

-Jake