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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

track runs off of front idler

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SAMRAY

02-01-2005 13:39:57




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Guys, I have a D7 48a series cat. the track occasionly runs off the front idler when I am sideways on a steep slope.The track is tight and always jumps back on if I back up. What should I look for to correct this? Is the front idler worn out? Thanks samray




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wilko

02-01-2005 22:13:06




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 Re: track runs off of front idler in reply to SAMRAY, 02-01-2005 13:39:57  
NC Wayne is quite right, but I would add that on a large machine like yours a good rule of thumb is to avoid side hills and plan your work to keep turns to a minimum to reduce wear.



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NC Wayne

02-01-2005 16:57:16




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 Re: track runs off of front idler in reply to SAMRAY, 02-01-2005 13:39:57  
Could be several things or a combination of things. If the idler is worn, yes, it could be causing the problem, too if the pins and bushings on the rails/chain are worn out allowing the track to flex side to side that could cause it, and if the front return roller bearings are worn slap out and guiding the rails to the outside instead of inline with the idler that could cause a problem. Too you ought to check the tension spring that the track adjuster rides against. It could be broke in one or more places and not providing quite enough tension to keep the track as tight as it should be when your moving even though it appears tight when your sitting still. I'm sure some of the other guys out there may have seen other things that can contribute to the problem, but these are the main things I've seen cause track problems in the past that I'd check first. Usually on an older machine though it isn't just one "major" problem, but the combination of wear on several different parts causing the problem.

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