does not include shipping and tax
1-year limited warranty
List Price $39.95 Save $12.00 (30%)
Estimated in-stock date 03-15-2014
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Average Customer Review5 (102 reviews)
Things I liked:The tool and the diagram
Things I would have changed:The nylon washer is useless and the thin o-ring was too thin.
What others should know:I have an older Sheridan Blue Streak that did not hold air. I purchased this kit from Pyramid Air and got it a few days (perfect) the dis-assembly whet very well but that is where it ended. I re-assembled exactly as instructed being careful to to cross thread the square nut. This went fine but the gun still leaked just as before. I dis-assembled and re-assembled several more times and no luck and of course my luck was destine to run out I started to cross thread the square nut. I had to walk away for the night and re-visit again the next day. I came to realize that the thin o-ring was the problem and just not thick enough. I substituted the thin washer with and O-ring from a Crosman 760 powermaster valve. (The o-ring that joins the 760 valve together) it worked perfect. But my trouble was not over I could not get the square nut to grab due to some cross threading. So I decided to try turning the square nut upside down due to fact that the threads are close to the very top of the nut. I also eliminated the nylon washer. The nut threaded right on and the gun works perfect. I passed 8 shots over the Chrony and averaged 620 fbs with Sheridan Diablo 14.3 gr. I love Pyramid Air and is my first place I go to for my airgun needs. But I think you may be able to find a better seal kit out there.
Things I liked:Fixed two old Sheridan's with these. Works good.
Things I liked:The tool with which to get the back of the air chamber apart and all the tips in these reviews with out which I may not have been successful at repairing my 1983 Benjamin model 347.
Things I would have changed:Get rid of the PTFE split washer, part # 27 and supply something that works just in case the lead washer does get damaged. I was REAL careful to NOT damage the lead washer. Some sort of tool is needed for use in removing the small screw that is in the bolt that contacts the hammer. A flat screw driver DOES NOT work. I had to mill the head off with a dremel tool then drill out and re-tap the screw hole and fabricate a new screw to take it's place.
What others should know:After removing part #29, parts # 27,28,31 and 25 fell right out. I had to spray kroil into the air chamber and let soak 30 minutes then reassemble the the air piston and pump handle to blow parts #30,23 and 24 out of the chamber as they were corroded in place. I cleaned up and reused the brass check valve/inlet valve part #30 gluing a piece of bicycle tire innertube to it's face as described in another review here. I had to file down the face of the new exhaust valve(part #31), the part facing the muzzle, so it fit the out let/exhaust valve spring. I chucked the valve in an electric drill and used a regular file for this, an idea also taken from a previous review . I used the supplied thin O ring part # 26 as the thin gasket did break during disassembly. I reused the lead washer because the supplied PTFE split washer, part # 27, is a joke I thoroughly cleaned all interior surfaces and parts and very lightly lubed parts with Ballistol to help prevent future corrosion. I used nail gun/air tool oil for rubber surfaces. The air chamber mechanism now works like new. I took my time and paid very close attention to how the thing came apart. A schematic and part numbers and names were found on Crosman's web site. I will keep at least one pump in the chamber at all times from now on the keep debris out of the air chamber and parts. All that's left now is to see how long the gun functions with this overhaul. I hope it lasts another 30 years.
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This product is out of stock. Estimated in-stock date 03-15-2014