Re: IH444 lift jerking

Posted by Haas on September 22, 2001 at 08:08:34 from (129.37.117.7):

In Reply to: IH444 lift jerking posted by chris mf35 on September 21, 2001 at 18:36:36:

Turn off the valve that holds the lift up and then see if the lift still goes down. If it does, then you have a bad cylinder/piston. It it stays up when you close the shut off valve, then your control valve is bad. Likely it is a bad seal on the piston. I had a 424 with this same problem and had to replace the piston, because it was worn to bad to replace the seal. I suppose the 444 is the same as the 424, which had a leather seal on the piston. To replace it with a more modern O ring, you will have to take it to a machine shop to have a groove cut for an O ring. However, in my case, the piston had been rubbing on the cylinder and was worn too badly to do this and the piston had to be replaced with a new one. The part is quite expensive from IH. The mechanic that did my work knew that the parts from a Mahindra tractor would fit. He used a Mahindra lift piston and it fit perfetly and cost less than 1/2 of the IH part. You'll have to drain the fluid and take the top off the hydraulic unit to get to these parts.

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