Thanks for all the advice and tips. I sure appreciate it. This tractor had bellows with the rubber gaskets on the backside. I called Olson about the 3B3383 seals and I'm waiting to hear back from them. Is there a substitute cement that I can buy at NAPA. Our nearest CAT dealer is about 80 miles away. I suppose they would ship it to me for a few extra bucks. If NAPA has anything that would equal Cats cement it would be more convenient. Thanks, Rick.

I think the contact cement you use for arborite should work. They both smell the same and act the same when useing them.
Later Bob

The D4 Servicemen's Reference Book calls for using Aviation Permatex #3 or equivalent.

And here what looks like after being used. LOL
Kelly

Thanks for everyones help on the cement question. I got busy with some other things and still haven't ordered any seals. I was studying my parts book today and it looks like I have the later style bellows seal assembly (5H426) which takes a 5H390 seal instead of a 3B3383. What is the difference between those two seals? I did a parts search for the 5H390 and didn't get any results. Is there a newer number that replaces it? I'm attaching a picture of the bellows I have. Am I correct on it being a late style part #5H426? Thanks, Rick.

Yes, that is the later rubber type bellows seal. They went through an evolution of cork to leather on the wear washer side and rubber composition to snap on type rubber gasket (no cement) on the back side. Don't know about superseded part number, better check with Cat.

Thanks Old Magnet. I appreciate the help. Rick