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I need to change the engine oil in my 790. I see the recommendations in the manual, with 5w-30 covering the biggest temp range, however I cannot find that weight anywhere. I mostly use the tractor to plow snow so cold starts matter more--we sometimes have periods of -10F, but it does get over 85...

I have a JD 790 with filled turf tires. If I drive over the same area more than a few times, the grass is killed. The only thing I can think of why this is happening is because the tractor is too heavy with the filled rear tires. Would I be correct? Thanks

Just curious, when you buy an attachment from a dealer, in this case a ballast box, do you expect it to be "brand-spanking new" or is it OK if it has had some obvious light use? My box had some crusher run residue in it and some surface scratches, mostly on the bottom. I paid full price for...

Hi everyone, I bought a used (340 hours) 790 with a 300 loader and 380A front plow back in June and am having a blast with it - both using and servicing. It's my first tractor so I'm learning as I go. The left grille had a hole in it from the previous owner and I couldn't stand it so I bought...