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Farmall & IHC Tractors Discussion Board |
Re: IH434(424) Jerky Hydraulics?
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Posted by Haas on March 08, 2003 at 17:35:14 from (166.72.245.24):
In Reply to: IH434(424) Jerky Hydraulics? posted by BlueLite on March 08, 2003 at 15:37:05:
I hope you have an owers manual, because this will make more sense if you do. Under the seat, or somewhere around there is a shut off valve for the hydraulics. That valve is used if you want to connect a remote. The valve shuts off the hydraulics to the 3 point cylinder (The cylinder is inside the unit). Raise the 3 point with a load on it. Then shut off the valve (Don't try to operate the 3 point with the valve closed). If the load does not stay up, then likely you have a bad seal in the internal cylinder that works the 3 point. If it does stay up, then you have bad control valve that is letting the fluid leak off from the cylinder. I'm betting it is a bad piston in your internal cylinder. I had this problem on the 424 I once owned. It was a bad seal (and piston) on the internal cylinder. The original seal on these pistons was leather. Better to replace it with a new piston that has an O ring seal. The IH piston is very expensive. However, you can use a piston from a Mahindra tractor parts dealer. It will cost less than 1/2 the IH part. That is what the mechanic that fixed mine did. Also, if your piston is still good, you can have a machine shop machine a groove in it for an O ring.
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