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Case Tractors Discussion Forum

Doctoring up SC o-ring groove

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Ken Christopherson

09-25-2007 16:08:32

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Good evening fellas! Got my block back from the machine shop. Boiled, sand blasted, and boiled again. Still have some pressure washing to do. Now, I have to doctor up the upper section of the o-ring grooves an the backside of # 1 and # 4 cylinders. Best bet probably being JB Weld. Wondering if anyone has any procedures on how to do this. Do I put the o-ring in place, gum up the area with a bunch of JB, and shove the sleeve in? Or to prevent the sleeve from getting JB'd to the block, should I put the o-ring in, coated with oil so the JB doesn't adhere to it, and try to doctor it up around the o-ring without the sleeve, and try to file it smooth. I know for re-assembly I want to smear some rtv on the o-ring's themselves to help create a better seal. I want this thing to be togeather tight and sound for another 65 years. I don't have the moeny to have the machine shop try to build it up and re-machine it, and don't want to try a different block. It is a '41 and has the origianl block with it. Has the ribs, BUT, The triangular braces on the front face of the block are not as large as later SC's. I am not too sure if anyone has ever noticed that...... Please let me know. These are my last two steps before re-assembly! Then the tractor has to be sand blasted/primed/painted! Also want to let everyone know. When your tractor is up on cribbing, be sure it is sturdy. Mine was adequate, but the tranny housing and clutch housing fell monday night. Almost on me. Thanks goodness I was not underneath it otherwise I would probably still be there. Had a tought time getting it back up on blocks with the 2-ton cherry picker, but managed to get it back up. Thank my lucky stars..

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Richard G.

09-27-2007 18:23:28

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 Re: Doctoring up SC o-ring groove in reply to Ken Christopherson, 09-25-2007 16:08:32  
I have done this and it worked well. Clean the grooves very well and put a good amount of the orange silicone gasket maker in the grooves. Push in the O-rings and seat them well. Put a little silicone on the sleeve about a half inch wide where it is machined at the bottom and put it in place. Let sit over night the it should be good to go.

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