My experience with "pure" cork material has mostly been with valve cover gaskets on '60s-vintage cars. The cork would eventually become saturated all the way through with oil -- and that's not a high-pressure application! I don't recall any bad leaks, but those gaskets eventually got very black and brittle; little pieces broke off very easily. So, I probably wouldn’t use that stuff on a hydraulic system if I could avoid it.
There is also what I would call a cork-rubber mix; you can see the pieces of cork interspersed with pieces of black rubber or vinyl or whatever it is. I used this type of gasket with good results (again, not on hydraulics), but due to the aforementioned experience with cork I coated both sides as well as the edges with a VERY light skin coat of silicone (to keep the cork from absorbing/transporting any oil). But again, that was no high-pressure application, and I don't know how the gaskets would have fared without the silicone.
Silicone itself is good stuff and can do the job, but I would try to use as little as I could get away with. Once you crank down on those bolts, it’s surprising how much of that stuff squeezes out of the joint – inside and outside. It’s tough, rubbery stuff, and even the smallest piece that gets loose inside can raise Cain with valves and orifices.
I think I would probably try one of Permatex’s non-silicone products first (I don’t remember which one, maybe it’s Permatex #2). If a piece gets loose it may not cause quite as many problems as a piece of silicone could.
You may want to bounce the Permatex idea off someone at the auto parts store or a local hydraulic shop. Whichever way you decide to go, please let us know what you do and how well it works.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Talk of the Town: Winterizing Engines - To Drain or Not to Drain? - by Russ Berry. What is this strange attraction I have to equipment and machinery? How did I get this way? I came from the suburbs and own a small horse farm in rural Loudoun County, Virginia. You can call me a "weekend farmer." The local farmers do. Does it bother me? No. I am just happy to have their friendship. At least the word "farmer" is in my title. But what is the attraction? How can I explain the sensation and exhilaration I feel when I turn the key and hear the engine come to life (most
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
