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 - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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