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Contributor

JD 644 Corn Header Problem

Put new deck plates, sprockets, gathering chains and guides on our header.  When tried to run the header the chains were riding up on the sprockets and trying to jump off of the top of the front sprockets.  Tried the old sprockets and the same thing happened.  Anyone had this problem?

 

Steve

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3 Replies
Frequent Contributor

Re: JD 644 Corn Header Problem

 

Are the tensioner  springs tightened up as much as they should be?   I'm thinking there should only be around 1/8 inch of  gap  in the pipe (sleeve).  Pretty much tightened up all the way except for 1/8 inch.  When my 444 runs, you can see the spring "chattering" back and forth,  the chain is really not able  to move enough to run up on the sprockets.

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Contributor

Re: JD 644 Corn Header Problem

We tried tighter and looser and it doesn't seem to make any difference.

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Contributor

Re: JD 644 Corn Header Problem

when replacing parts, was something like sheet metal bent to cause chain to try and ride up, or sprockets installed too high or low?  was the framing bent where the sprockets mount?  the reason for the chain not following straight path would be the first thing I look for.  Maybe something didnt look right and got "rigged" a little for ease of installation?

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