It's a sweet machine. Like a dog, they all are if they have been treated well. Mine is a long way from new. It had some early issues. The undercarriage on the 3400 hour machine had been replaced. New shoes were 16" instead of 15 stock. This infringed 1/2" each side on the minimal clearance between track shoe , and swing cylinders. I began with wishbone pivots. These are non lubricated, non bushed pivots. There was a bit of slop in them. I hoped boring would tighten them enough to alleviate the shoe scrub. Dressers have a walking undercarriage in that the front crossmember pivots in the middle. Travel is limited to two inches. At one point in the first month I was playing with it, a friend drove in, I shut it off. Standing on the front of the track I noticed too much movement in the front idler. Dressers have 8 Rub bars to locate the front idler. The replaced undercarriage should have included these. It proved a big job 'cause I had never done one before. Otherwise it has been lots of fluid/filters, some new hoses (one cost $450.00), new batteries, and all new cables new seat, bunches of rubber parts etc.
Could your shoes be freshened up with new grousers? The easiest stick welding process there is.
Willie