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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Re: Revisited - Track off of a D7-17A fixed

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Author  [Modern View]

04-08-2013 22:08:28

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Glad to hear it went back on relatively easy a a thrown track is usually a real PITA.....not to mention they usually happen in the absolute worst place you can imagine to work on one.

That said, a tip for future refference. You can usually eleminate the need for a jack on the older machines with enough hardwood blocks. What you do is put the blocks under the rear of the machine, first making a good base, and then stacking them as high as possible. If you can get them to touch the bottom of the machine that's great. The placement will depend on the way the machine is balanced, the lay of the land, etc, but typically you want to stack as close to the side your wanting in the air as possible. Once you get it blocked then put the blade on the ground and apply enough down pressure to lift the machine. What will happen is the machine will pivot on the blocks and lift the whole side, drive sprocket included, off the ground. In a case like your talking about, with soft ground, a good foundation is a must, but it it will still usually take a time or two of lifting and reblocking to get the foundation blocks imbedded in the ground as far as they want to go, and for the stack to become solid. Once you get the back up you can either block the front to keep it up, even if the blade drifts, or simply keep the machine running and keep adjusting as it drifts. Either way you can maintain the complete side of the machine, and therefore the whole length of the track off the ground without using any tools other than a few hardwood blocks. Working on equipment for a living I've done it many, may times over the years and have only had a small handfull of machines where it did work, and most of those were the newer ones. Good luck next time.

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andy r

04-09-2013 06:49:59

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 Re: Revisited - Track off of a D7-17A fixed in reply to NCWayne, 04-08-2013 22:08:28  
Think that might be a little hard to do as mine is a cable machine!

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04-09-2013 09:51:04

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 Re: Revisited - Track off of a D7-17A fixed in reply to andy r, 04-09-2013 06:49:59  
Your right, I obviously should have been, but wasn't, thinking about that when I saw the 17A prefix. The cable machines present their own share of problems when it comes to having the machine do the work for you in many cases just like this. Next time just do like I do when I need to change a tire on my service truck. Simply hook up the crane mounted to it (in your case the winch) and pick it up.....LOL Seriously I had a guy asked me once if I could do that. I kept him going for a little while before it got to hard to hold back the laughter....

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Billy NY

04-16-2013 14:30:22

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 Re: Revisited - Track off of a D7-17A fixed in reply to NCWayne, 04-09-2013 09:51:04  
LOL, thats funny, but the line speed is too fast on those CCU's if I recall, you can't use em like a winch, interesing enough though, I have seen photos of D7's in WWII using LeTourneau PCU's as a winch, must have been hard on the driving and driven cones and or friction part on either, if you used them like that without somehow gearing it down, multi part line or what, hard to visualize being able to do that with cable control from one of these.

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