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IH 1440 head drops


chadd

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What would cause the header to drift down when setup is changed to use the AHHC?  My combine is an early 1979 1440, so it is the twin stick, not the electric over hydraulic.  When I had it set up for the corn head, the head stays up seemingly forever.  After doing the setup changes for the AHHC, when the hyd. valve is in the neutral position, the head drops so fast from the top of travel that I can't get the transport lock tube to engage because it has fallen too far;  even when I jump down the ladder after just letting go of the valve.  There was an o-ring on the check valve in the valve stack that had a chunk missing, but replacing it didn't fix the problem.  I removed the new o-ring and it is still fine.  Anyone have any other ideas?

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23 hours ago, nepoweshiekfarmalls said:

You may need to try to adjust the bolt on the header valve that you change between grain head and corn head. They can be touchy. 

Thanks, I'll give that a try and see if it does anything.

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