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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

case 450 dozer.. track came off of front sprocket.

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Jmoore25

10-10-2006 16:46:50

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we just bought a case 450 dozer and we were using it to knock down trees.... i heard a pop and i looked down and the track came off the front left sprocket... it busted part of one of the plates and is wedged against the arm of the blade to i cant go forward or backwards... how do i get it back on track??

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mud - look like this?

10-13-2006 17:55:48

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Re: case 450 dozer.. track came off of front sproc in reply to Jmoore25, 10-10-2006 16:46:50

I have done that a time or two.

Mine is a Case 450 loader.

First off you need to ease tension on the idler.

Is it on a slope?

Need more info to help you.

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Jmoore25

10-14-2006 21:57:07

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Re: case 450 dozer.. track came off of front sproc in reply to mud - look like this?, 10-13-2006 17:55:48

yes it is on the slope... where can i locate this bleeder valve??

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David in SC

10-15-2006 03:48:52

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Re: case 450 dozer.. track came off of front sproc in reply to Jmoore25, 10-14-2006 21:57:07

JMoore,
The yoke that pushes your front roller out should have a square head plug on the top of it. About 1" if I remember correctly. Take this plug out and inside there should be a grease fitting. Slowly remove the grease fitting; I think it is a 13/16" or thereabouts. This will allow the grease the escape and your front roller will begin to loose tension. Then, I would use a pry bar or whatever you can to move the front roller back a bit to get some slack in your track. Then carefully jack up the front of your dozer and make sure your track is under your bottom rollers. If it is not then use pry bar or other to pull track under your bottom rollers. Lower front of dozer and try to back machine up. In the photo above, I think backing machine up SLOWLY while trying to make a left turn (left track in slow reverse while right track in fast reverse) may let the track come back up over the front roller and back into proper position. This same scenario used to happen to me about twice per day on my 450B loader because my bottom rollers had worn so bad they had no flanges. I got good at operating while watching the track instead of where I was going. Not recommended. Also, mine was a loader so I could use bucket to raise front of machine and then block it up. I do not know how you can, maybe you can put blocks under your raised blade and push down. Your call. Whatever you do, never put yourself in a position where the combination of poor rigging and gravity can get you. I never put as much as a finger under my raised machine and I never got behind it while doing anything on a slope.
My $.02 worth.
Good luck.
David in SC

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oldcraneguy

10-11-2006 12:48:23

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Re: case 450 dozer.. track came off of front sproc in reply to Jmoore25, 10-10-2006 16:46:50

Important! when you remove that grease fitting remember it can be under a BUNCH of pressure, turn yer head away, wear safety glasses or do something to protect your eyes, we had a mechanic long ago that lost an eye banging a scratch awl into the top of a button head fitting trying to get slack to get a track back on, beyond that like the man said, muscule,come alongs, bars, and more muscule, if youve got a six way blade you can chain to it and use it to pull track as well as putting a block of wood between it and the front idler to push it back once the fitting is back...good luck...Don

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Jmoore25

10-10-2006 18:32:11

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Re: case 450 dozer.. track came off of front sproc in reply to Jmoore25, 10-10-2006 16:46:50

its looks like there is just a plug in it... but ill have to look again tomarra... it was in the dark tonight.. thanks for the info, its much appreciated

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Case450

10-10-2006 17:39:44

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Re: case 450 dozer.. track came off of front sproc in reply to Jmoore25, 10-10-2006 16:46:50

Remove any and all debris first. Loosen the track adjuster unit by SLOWLY AND CAREFULLY removing the grease fitting located right behind the front idler wheel. If the front idler wheel doesn't loosen up on it's own pull it back with a comealong. Now you have all this slack track hanging off your machine. Use come alongs and prybars to get that sucker lined up under all the bottom rollers and either hook a sprocket and drive the track back on or put your back into it and muscle the track on. My track used to jump all the time and was completely destroyed. I just finished installing and rebuilding my undercarriage...did it all (labour included) for $7000.00 cdn. Some of the other fellers on here might have a more efficient way of getting the track back on either way, good luck man!!

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JoelD

10-10-2006 18:45:08

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Re: case 450 dozer.. track came off of front sproc in reply to Case450, 10-10-2006 17:39:44

I've read on this forum that if you catch early enough, you can drive back onto the track by driving exactly backwards to the way you were driving when it came off. On my 310, I had to break the track, had a master with lynch pins (probably did nothing to help with keeping the track on), line everything back up, use a come along (a large ratcheting strap) to pull the two ends together and then a prybar to line up the holes and then put the master back in again. Not fun, not fun at all. I am sure there are guys here with better advice than mine. Most important advice is, don't get your self into a compromising position, way too easy to get hurt bad with these machines.
Good luck,
Joel

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