Hydraulics

CBALL · Jun 6, 2015

I have a 1968 IHC 444 with an original front end loader on it. My hyd pump started leaking and after buying a new one the pressure has blown the seals out on two more pumps. Does this tractor have relief value on some where? As far as I know all the equipment is original. It is a IHC front end loader. The pump is mounted on the right front of the engine faceing from rear to front. I don't have a manual on the front loader. Any help would be greatly appreciated as these pumps are very expensive and I would like to find out what is causing this problem before I put another pump on this tractor.

JimB2 · Jun 6, 2015

Hi Cball, does it have 1 or 2 hydraulic pumps stacked one behind the other? One for loader and 3pt and one for PS. Most USA assembled 444s had 1 pump and a hydraulic flow divider for PS. The flow divider for PS has an in-build relief valve see caseih.com parts link items 13 and 14. The 3pt has a relief valve as well and the loader control valves should have a relief valve.

What model loader is it? 1501,1550?
When does it blpw hydraulic pump seals, when just using PS, when using loader, when using 3pt?

caseih.com parts flow divider link: http://partstore.caseih.com/us/parts-search.html#epc::mr52525ar1302222

JimB
caseih.com parts

Paul Janke · Jun 6, 2015

If your hydraulics go from the pump to a valve and from that valve to another valve then you can end up with the pressure from each valve added to the other. This happens fairly often when people don't use power beyond valves. Pumps are built with the ability to build more pressure than they can withstand.

Hydraulics

CBALL

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JimB2

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Paul Janke

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