560 Hydraulic Reservoir Flushing??

I have a question regarding how to clean up the transmission/hydraulic fluid on a 560. What I mean is, my buddy says that since the hydraulic couplers for the remotes were really dirty (and they were when I bought it) most likely there is dirt in the hydraulic/tranny fluid and I should drain it and flush it.

Draining is no problem. But...how do I flush it to remove any residual dirt that doesn't come out with the fluid? Should I put new fluid in and just let that drain out? That could get expensive real quick. Should I use some other fluid to flush? (probably not a good idea, I'm thinking) if so, what?

Someone has to have done this before.

Also, same friend recommends using Shell Donax TD instead of CIH Hy-Tran to save a few dollars. Shell says it meets the Case-IH spec for "Hy-Tran Plus". I forget the spec number.

Any experience with the Donax instead of Hy-Tran?

Thanks for the advice!

I've got the same identical problem.

Bought this old 86 series tractor and the hydraulic oil was totally black. Changed it along with the filter and the fluid is already showing somewhat of a grey color.

What I am going to do is just service it as per usual. I'll change it again next spring and then the following year, as one would normally do.

That belly has to be full of mud, but I think with use and a good regimen of service, it will clean up in time.

Don't know about your oil choices.

My method,

Allan