I have a John Deere 445 tractor with 1200 hrs use. I purchased it in 1998. I have several implements including a 40 loader, tiller, 54 inch mower, snow blower and plow blade.
The tractor chattering occurs when lifting any of my implements, also when steering. Action is not smooth, but jumpy. I can feel the chatter in the steering wheel. Steering is not smooth until the tractor has been operating for some time. Now it has gotten to the point where it never does get real smooth.
This has occured in the past, and changing hydraulic fluid resolved the issue. However this time new fluid did nothing to resolve it. The chattering lessens when the tractor has been in operation for a while. It has gotten to the point it takes too much time to do any useful work.
My local dealer says it sounds like cavitation. My question is, has anyone out there had this problem, and if so did you or your repair person find the problem, and how was it repaired.
I like to do my own repairs when possible, but I don't know where to start on this issue.