806 Hydraulic control valve

Brian Stockmaster · Mar 9, 2015

Hello everyone,

Its been a while since I posted on here to pick your guys brains, but I have an issue with the hydraulic control valve on my old man's 806. The spools were leaking and decided tonight to try to take them apart. It seemed like a good way to spend my spring break instead of going to Florida. So I followed the IT manual the best I could, and got the spool out but managed to break off the union (part #395783R2) trying to get it out. Seems to me that happened on the other 806 last time my neighbor redid the spools for me. I tried to used a small chisel to turn out the broken piece with no luck. Any tips or ideas on how to get that out? Any help would be appreciated. Also any tips to get that union out better/easier would also be appreciated since I still have to do the one for the other remote.

Here's the breakdown from the parts website

http://partstore.caseih.com/us/BFC/parts-search.html#epc::mr53293ar1293794bi3976449-15

pete 23 · Mar 9, 2015

What I would try is make a big easy out. I know, hate that word. Take a flat piece of iron just a little larger diameter than the pipe that is broken off. Bevel the edge a little and drive it in. Not too tight so as to stress the valve body. First off though, put some lint free rag or paper inside the spool bore to protect it from crud. On the other one, I would do a little tapping close to the threads and put a pipe wrench on it. Now, the way to avoid this problem in the future is to lube those threads when installing and do not tighten it very tight. There is nothing to leak out of those threads anyway as the o_rings hold the oil. What I do when I assemble the spool is to tighten that large nut really tight onto the pipe by putting the nut in a vise and using the pipe wrench on the pipe. Then the next time you can put a socket on the nut and it will screw the assembly out easily. If you don't like using a pipe wrench on it a chain wrench works also. A rag on the pipe wrench will keep from marking up the pipe (union).

Brian Stockmaster · Mar 9, 2015

Thanks for the quick reply. I might try that easy out trick tomorrow when I get off work. I'll let you know how things go. This is the first time I've tried doing this repair but figured I better learn how since this seems to be an ongoing problem with the other 806 we own.

Brian Stockmaster · Mar 9, 2015

Also, you said about lining the threads, would you recommend using anti-seize on something like that. I don't know if it would affect the orings or not.

pete 23 · Mar 10, 2015

Anti sieze will work but just a little grease is fine. If I was there I could show you in a minute how to disassemble and reassemble that mechanism in the valve spool but hard to explain on this key board and I always found the book to be kind of doing an end run on that job.

Brian Stockmaster · Mar 11, 2015

Thanks for your help Pete. I got it torn down and reassembled.

806 Hydraulic control valve

Brian Stockmaster

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pete 23

Well-known Member

Brian Stockmaster

New User

Brian Stockmaster

New User

pete 23

Well-known Member

Brian Stockmaster

New User

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