Hi Bill, If it is a Diesel engine the hydraulic pump is at front right of engine, IIRC it is driven by cam gear. If you have power steering there will be two hydraulic pumps, second one is stacked behind the first one. Go to CaseIH parts at: http://www1.caseih.com/northamerica/PartsService/Pages/search.aspx then search for 434 page 5-14 shows hydraulic pump and plumbing. Is it cold where you live? Since it stopped working all of a sudden, I would suspect ice somewhere. When we had a 434 with a 1501 loader and it was -30F sometimes the hydraulic controls for the loader would freeze and stop working.
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Today's Featured Article - Talk of the Town: The Saga of Grandpa's Tractor - by The following saga is from the Tractor Talk Discussion Forum. Someone. The saga starts with the following message: Hey guys I have a decision to make. I know what you all will probably suggest and it will probably agree with me way down inside, but here it is. I have a picture blown up and framed in my "tractor room" of a Farmall M. It was my Grandpa's tractor, of which whom I never got to meet. He froze to death getting this tractor out of the barn to pull a truck out of the ditch before I was born. Anyway my dad and aunt had to sell it at the auction,
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