Tony Ingram Posted July 3, 2017 Share Posted July 3, 2017 Found an air leak on my shutterstat valve where the rod comes out. Got a 61' G model with an NH250 Cummins. What seals the air inside the cylinder? There are 2 rubber type plungers that are inside the cylinder and a smaller rubber dome shaped piece towards the top where the shaft comes out of the cylinder. Is the smaller one towards the top where it seals? It doesn't fit snug around the shaft. Has anyone rebuilt one of these with parts from a local parts store? If so what did you use? I would upload a pic but my images always fail to upload. The new format on this site is terrible, at least for me to use. The old site was a lot more user friendly for us technology inept. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
j hancock Posted July 3, 2017 Share Posted July 3, 2017 Recall a rubber piston cup being inside. https://www.baumhydraulics.com/files/catalog/sec-g.pdf Scroll down to G11 to check out the sizes. 1 Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
alex g Posted July 3, 2017 Share Posted July 3, 2017 I have a brand new shutterstat cylinder Kysor #D 21550 if you don't have any luck fixing yours.Sent from my SM-J320W8 using Tapatalk Quote Link to comment Share on other sites More sharing options...
h67st Posted July 5, 2017 Share Posted July 5, 2017 On 7/3/2017 at 1:07 AM, Tony Ingram said: Found an air leak on my shutterstat valve where the rod comes out. Got a 61' G model with an NH250 Cummins. What seals the air inside the cylinder? There are 2 rubber type plungers that are inside the cylinder and a smaller rubber dome shaped piece towards the top where the shaft comes out of the cylinder. Is the smaller one towards the top where it seals? It doesn't fit snug around the shaft. Has anyone rebuilt one of these with parts from a local parts store? If so what did you use? I would upload a pic but my images always fail to upload. The new format on this site is terrible, at least for me to use. The old site was a lot more user friendly for us technology inept. Thanks in advance. Regarding your photo uploads, have you tried dragging your pics to the box under your post? It works great on Firefox. Quote Link to comment Share on other sites More sharing options...
Freightrain Posted July 6, 2017 Share Posted July 6, 2017 (edited) Just rebuilt mine last winter. The only real seal needed is the cup seal on the piston. The rod has no air seal because the cup seal does all the work. I think mine had some kind of felt wiper? Or maybe it was rubber? I did have to punch a hole in the new cup seal(can't order it with hole). No big deal. Works great and doesnt leak a bit now. It used to constantly hiss. It now snaps shut/open with force instead of draining my air supply trying. I ordered it from Baum and got in a couple days. Edited July 6, 2017 by Freightrain Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
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