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Re: Re: HELP!! JD350b track jumped sprocket!!??!!
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Posted by Sean on February 23, 2004 at 10:01:12 from (192.58.199.188):
In Reply to: Re: HELP!! JD350b track jumped sprocket!!??!! posted by MrBill on February 23, 2004 at 06:43:47:
Mr Bill, I dont have a JD crawler, but I do have an IH crawler that has the hydraulic (grease filled) adjusters. On my machine the bolt adjacent to the grease fitting is the grease release port. If you crack that line while the track is under at least some tension the grease should squirt out (it does on mine), and the tensioner should retract. It may not retract far enough for you slacken the chain to the extent you can get it back on, but thats where to start.
I'm no crawler mechanic, nor do I have much experience with crawlers yet (I've only had mine for 2 months too) so take this with a grain of salt. But I believe the method that's usually used to really slacken the chain is to open the grease port on the tensioner, and to wedge a block of wood between the sprocket and the track links. Then slowly and gently move the machine backward so that the block of wood is being drawn into the sprocket. This takes up the chain slack and will compress the tensioner, which should squeeze out the grease and allow it to fully retract (so that you can get your chain back on). But since your track is off, I guess you would have to force the tensioner back using the comealong or a porta power as you mentioned.
I've also heard to be careful opening the grease port. My manual says beware because if you open it too far while the tracks are under significant tension, it could shoot out with high velocity. I just cracked mine open and the grease came out nice and easy no big deal. Just be careful while you're loosening it.
Good luck
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