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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Frozen track pins and bushings

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12-11-2003 07:31:59

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I have searched the site and read everything about how to unloosen the stuck pins and bushings on my D3 rails. The dozer only sat for about a year before I bought it. We raised it on the blade and ripper bar and ran the tracks around. About every third or fourth pin on both sides seems to be stuck. No one has said anything about tightening the rails (possibly even a little tighter than spec) so that more pressure is exerted on the stuck pin when it rolls around the sprocket and front idler. Anyone have any thoughts or experience on this idea? Also suggested in other discussions was to soak the pin with diesel or penetrant. I did not understand how to do that with the tracks on the dozer other than to just try to spray it in the crack between the pin and bushing. If they really mean "soak" it, I assume you would have to remove the tracks from the dozer, which would be a job in itself. Rather than trying to remove the tracks, my thought was to use some 2x12s and 2x4s to build a box, line it with two layers of heavy plastic, raise the dozer with the blade and ripper bar, push the box underneath, and then set the dozer back down. Then fill the plastic "pan" with diesel (or penetrant if it can be bought in bulk) and let it soak for several days. Your comments are appreciated. I just want a dozer that doesn't buck when I try to use it.

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12-17-2003 17:52:00

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 Re: Frozen track pins and bushings in reply to grandlaker, 12-11-2003 07:31:59  
use HEAT!!!!

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12-14-2003 15:36:05

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 Re: Frozen track pins and bushings in reply to grandlaker, 12-11-2003 07:31:59  
There is another reason besides rust that D-3 pins lock up. If your rails are relatively new (not a lot of wear), then it is probably just rust. If there are nearing the end of their life the bushings can can peen to the pin and no lube will help.

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12-11-2003 18:48:31

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 Re: Frozen track pins and bushings in reply to grandlaker, 12-11-2003 07:31:59  
Have three track presses and doing press work i have seen tracks that would not free even had troubles with small John Deere tracks on a 60 ton press, on tracks that a 35 ton can press with easy now i have a 150 ton one for those but there is a name for what happens between the pin&bushing put they can almost become one. If it really has been only a year you may get it but if someone tells me one year i figure three i do it myself think something only sat a couple of years then i think about it amazing how time passes Good Luck

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12-11-2003 17:32:31

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 Re: Frozen track pins and bushings in reply to grandlaker, 12-11-2003 07:31:59  
Good luck...I've seen tracks that wouldn't free up.PB Blaster is good stuff.. Another excellent penetrating oil is Kroil.. Try it it might work.. I've had to cut the tracks apart on extreme cases.. It pays to be handy with a sledge and a B&O hammer.. If you have to cut the track, you can make every break a master pin...

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ken in maine

12-11-2003 13:12:36

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 Re: Frozen track pins and bushings in reply to grandlaker, 12-11-2003 07:31:59  
Hi PBlaster usually works wonders. Just keep spraying them as you can and try taping them with a sledge hammer to help them. You have a big advantage as your machine is in running condition and you can roll it back and forth. I would just keep spraying and thumping. You'll get em. Ken

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12-11-2003 08:49:47

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 Re: Frozen track pins and bushings in reply to grandlaker, 12-11-2003 07:31:59  
One more thing I don't quite understand. I have looked at cutaway drawings and parts diagrams of a track assembly and there appear to be seals between the pins and bushings. If this is the case, then is the "stuck area" the hinge pivot or does the seal/pin/bushing wear and deteriorate to the point that the bushing and pin rust and become frozen on the inside? At the risk of wasting time and money, I am going to spray PB Blaster on the hinge pivots as my next step to see if that helps. Thanks again.

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Oldfarmboy Jim

12-11-2003 10:05:38

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 Re: Re: Frozen track pins and bushings in reply to grandlaker, 12-11-2003 08:49:47  
Now you've got the right idea and at the right price, too. I brought a TD 340 back to life after sitting for 8 years. I blocked it up securely and each day I'd put a little diesel or waste oil(just a few drops) at each hinge that I could reach. When I first started, the tracks were so frozen that they just skidded along the ground when I tried to pull the tractor. By the time I finally got the engine to run (still blocked up), It only took two attempts of letting the clutch out in low gear to get the tracks to move. Then each day that I had it on blocks, I'd run the tracks to a new position and oil the parts I coulcn't reach before. I wish I had thought of using PB Blaster first and then a heavier oil after the Blaster worked it's magic.

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