All y'all, I picked up a 1965 or so John Deere 2010C tracked loader with a Drott 4 in 1 bucket. Runs pretty well and generally in good shape, but has a problem with the controls. When the previous owner parked it a year ago, there was no problem. Now, the bucket tilt and jaw opening interact unpredictably. The raising/lowering of the bucket works perfectly and does not interact with the tilt and jaw functions. Scratching what little hair is left on my head. There are two control sticks. The front one: fore and aft control the raising/lowering of the bucket. Left and right control the tilt of the bucket. The rear one: Has only fore and aft motion. It seems to open/close the jaws, but in so doing, it also affects the tilt of the bucket. The two sticks are linked, so that side to side on the front one also pushes the rear one fore and aft. Again It was working properly last year and nobody has replumbed it or done anything at all to it. It just started acting goofy all on it's own. I tried bleeding the hydraulics by raising/lowering the bucket several times, tilting several times, opening the jaws several times. What would do such a thing? Broken spring or otherwise messed up controls? There seem to be 3 spools of hydraulics in the control box. There is a data tag on the control box and it says John Deere model 820. That suggests that the controls may have been originally on a JD 820, I'm guessing.:beatsme I don't have any documentation that explains this setup. Ideas? Dirtmaster
Solved. Sitting over the winter, rain must have gotten into the controls and rusted together two of the levers. It didn't just rust everything together, though. It chose two controls that were side by side, and both rolled easily together, although they were bonded together tightly. Looked like it was one control bar, but it was really two, rusted together. A little WD-40 and jiggling the controls and it broke free and works perfectly. Very selective rusting.