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I have a question for x500 owners. I have an x590 with 5.5 hours on it (don't get much seat time these days, I'm retired but so busy I don't get to ride it).
When I do take 'er out, the K72 whines. Is that a normal sound with the K72? The fluid is right at the full line when cold, and it should be well oiled, as it is kept inside, but it is noisy.
All the other GTs I have owned were quiet, but this is my first Deere. Thanks!
 

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I have a plain X500 and it whines. The noise will get louder as the load increases, like when pulling my 920 lb. lawn roller.
 
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Prior to purchasing my X738 I owned an X580. I did some serious ground work with the machine with front blades, tiller, hauling and general work around the house. The tranny will whine, but most larger transmissions also whine. When that good old K72 stops whining be concerned. Until then good luck with machine. It a great tractor.:bigthumb:
 
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I own a '99 JD 345 which has made the "whining" noise from day one....new with 0.2 tenth hours. It now has 918 hours on the meter. And it has mowed 10 acres for about 16 years. I bought a new K70A back in 2005 to have in case I need to replace the factory one. It is in a wooden box in the garage. I will installed it when the 'whining" stops on the K70A in the 345.
 

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It seems that hydro whine is commonplace in these class and the 1-2 series of machines.

It’s actually very common in construction grade diesel hydraulic machines too. Large excavators, loaders and many more all have a hydraulic whine during operation as the pump powers up under load to start things moving. It’s just not as noticeable as these machines are louder operating and working than outlets tractors, making the whine less apparent.
 
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