I picked this unit up a few weeks back. As I rolled it up my drive 3 days ago to begin working on it, I heard something rubbing in the gearbox as I rolled the machine. I got around to opening the belly pan yesterday to inspect inside their, unit has low hours, it has its original friction disk, skids and scraper with marginal wear. I noticed the larger chain is rubbing against the orange bar that goes across the bottom. The chain functions as it is supposed to with the machine running in gear, in tensions up enough to where it doesn't rub. However its slack and rubs when off just rolling the unit. All the bearings and bushings are good. I thought that bar was bent, its not, its straight going past under the chain. What's left? A stretched chain? What size is the chain? I can order a new one and replace it if need be. I have a spare chain from a 10,000 series maybe that will work. Odd though, unit has low hours. I attempted to adjust the tension, I loosened the two nuts holding the chain sprocket where it is. I pushed it up, until it was tight and re-tigtened the nuts. Didn't realize it at first, but they call to be tightened to 170-180 inch pounds max, anymore, its too tight and causes the thing to bind. So I overtigtened them the first time, it was hard to push could have been the nuts to tight, or the chain to tight or both. Will try re-adjusting today. Again unit functioned fine on, but chain rubs when off rolling the unit, which is annoying and it could wear out the chain over time. Does anyone elses rub, that isn't normal is it? What am I missing. About where on the slots should the sprocket be tightened down, how much should I tighten the nuts by hand, its hard to get a torque wrench in that area? You want a little bit of slack right, too tight would cause it to bind and be hard to push. Is the chain rubbing down their normal, should I get used to it, or is that wrong and need to be tightened up?
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