Some of you may have seen my previous post about changing the hydro oil in my 757 at 390 hours. Well, I did the change today and am glad I did. This is a PSA to check your fluids. The previous owner I bought this from was meticulous with maintenance, but it looks like he may not have been changing the hydro oil enough. Attached are some photos from the change. The substance on my finger appears to be from water that got in the system and created a foamy grease-like mixture. There wasn't a ton of it, but I'm glad I did the change. Taken out was 2 gallons of (likely) factory fill and put in was two gallons of Mobil Delvac Extreme 15W40.
John Deere 757 Hydro Oil Change
- Thread starter brandon9715
- Start date
Good deal & that substance does look like possible moisture or break-down of fluid. ZT looks pretty clean for the hours & I'm sure you cleaned the grass off that screen already. Looks like it was a straightforward change & those pumps are more popular than ever these days it seems.
Definitely moisture in the fluid, likely the previous owner had a small yard and never got the fluid up to temp.
That’s the weird thing, he has a good sized yard. Sold this to upgrade. I mow two acres with it, but he mows around 5.