I just changed the hydraulic filters and oil on my 4066R. I was pouring in the first five gallons of JD Hygard Low-Vis and the oil started becoming white and cloudy as I got down to the bottom. I stopped pouring and looked in the bucket and couldn't believe what I saw - white cloudy sludge in the bottom of the bucket. I was hoping this was normal, but I poured the second five gallon bucket and it was light brown and clear the entire pour.
Has anyone ever seen this? Is it possible John Deere sold me a bad batch of hydraulic oil??? The bucket was sealed when I opened it. I did notice that the lip on the lid of the bucket was deformed at one spot. But, oil didn't leak out from this spot.
I called the dealer, they said to drain it. Guess I am changing the oil again.