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Fast forward a couple years... Reverser is still working great.. Replaced the cooler relief valve... Only to find the cooler was almost completely plugged.. Blew it out with air, flushed it out really well in both directions.. Changed fluids and filters again... Now it whines a bit a HIGH...

Thanks Wolfman. I'll get one ordered and see what that does... I freaking LOVE both of my Kubotas... They are incredibly comfortable and relatively quiet. Jonathan

UPDATE: Changed fluid to SUDT2 and new filters of course.. Also changed front axle fluid also SUDT2, center section and knuckles.. All fluid had a metallic sheen, no big chunks though..Is this common? After fluid change all hydraulics were smoother and nicer overall.. But the whining noise...

Of course if I didn't change the fluid myself, there is every chance it CAME with the wrong fluid to begin with... I'll just change all of it and, and the bypass and see where that gets me... :) Thanks Jonathan

This may sound funny, but when I first bought it, after using it for a few days and discovering the whining (that wasn't whining on the 15 minute test drive) I changed the filters... But rather than actually reading the manual (SMH) I just put a catch pan under the filters, spun one off, and...

TTT. I meant to say, "when people talk about the hydraulic whining that goes away when you give it some throttle, They say it is a hydraulic bypass/relief valve." The only one I could find on the front of the tractor is in the hydraulic cooler line, and is $148 from Messicks... Does that sound...

Dumb question, when people talk about the hydraulic bypass are they talking about the one in the oil cooler line? You know, the one that looks relatively easy to replace and probably not horribly expensive? lol Thanks Jonathan

Hyjacking his thread... I bought an 07 M9540 with around 2000 hours last year about this time... I didn't pay very much as it was at a green dealership and they wanted it GONE. It needed new front tires and a little TLC... It worked fine last summer, but it was making a hydraulic whining at...