leaky hydraulic auxiliary valve

JohnAndrew · Jul 24, 2014

I have a 1962 international 404. When I took ownership it had a leaky hydraulic auxiliary valve. The gasket between the plate and the valve was blown. I change gasket and o-ring and gasket blew again. Anyone have advice?

mkirsch · Jul 24, 2014

First thing, make sure there's supposed to be a gasket. AFAIK those valves are only sealed with Orings, and a gasket will spread the metal parts too far apart and weaken the seal.

That said, I'd also look for blockages in the system downstream that are preventing the oil from returning to the reservoir and causing the pressure to build up.

From the way it sounds the relief valve is not working and if you put it together so the gasket can't blow, something else will blow. Probably, something expensive and/or no longer available as a replacement part.

JohnAndrew · Jul 25, 2014

Thanks for the tips. The parts illusions show a gasket without o-rings. I will see what I can find out about a relief valve.

JohnAndrew · Aug 4, 2014

Well I think I found the problem. A mechanic directed me to look at the three bolts that hold the plate on. One bolt I could see the treads stretched out, so is install three grade8 bolt and so far so good. I will hook up the three point blade on it tonight to work the system.
One other thing I noticed is when I move the control lever up all the way to raise the arms. When the arms reach the top the travel the system continues ‘ strain’, motor rpms drop. So I lower the arms slight to get them off the top position.
Is there some type of valve that release once the arms reach the top?
Where is it at?

leaky hydraulic auxiliary valve

JohnAndrew

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mkirsch

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JohnAndrew

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JohnAndrew

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