Hi Chad,Before you start opening up the hydraulic pump itself, I'd strongly recommend you purchase the official AC Service Manual for the B&C. That's the best source of information on disassembly, inspection and testing of that pump. The I&T Shop Manual that covers the B is good for supplemental pump info and you should have that also, but it is definitely not a substitute for the AC manual. You probably will have to go through everything on a methodical basis regarding that pump. Hopefully you'll find that just an internal cleaning and reassembly is all that is required. Don't bother going the rebuild kit route - at least not yet. Those are extremely expensive and do not include some of the key parts that might need to be replaced. If you find that parts need replacing, I'd investigate purchasing an already rebuilt pump from a supplier. At least that way you can get some core credit. That is unless you find a single bad part that is available separately from AGCO as a replacement - some parts are available separately and some are not. When I did my pump, I was very lucky. I bought it off Ebay since my B didn't have a pump to begin with. It didn't work. Come to find out someone had previously disassembled the thing and apparently lost the ball that makes the relief valve function. I was fortunate in being able to find a ball from a ball bearing that was the appropriate size and that worked out well. To give you an idea of the costs involved, a rebuilt pump should run somewhere around $300, including a core credit. For a comparison, two years ago, the "rebuild kit" from AGCO was about $200 as I recall and that did not include some key parts that would have to be purchased separately, if needed. Rebuilding it yourself can be a costly gamble unless you have it all sorted out as to what you actually need and have evaluated all costs beforehand. You apparently have no flow at all, even out an open hose. Do you know the history of the tractor? Has the pump ever worked before? Do you even have the lobes on the pto shaft to drive the two pistons in the pump? Perhaps the pistons are just stuck in their bores. Who knows. Get the manual(s) and go from there. Here's something else to consider: If you haven't cleaned out the transmission/differential/pto cavity before, I'd do that also - before I removed the pump from the pto housing. Drain out everything - there are three drain plugs. Install some light oil, say SAE10 or lower (I've heard some use kerosene), and drive the tractor around for a while. Then drain that all out to flush out any sludge. Then a fresh refill through that single fill opening with some combination transmission/hydraulic fluid. I use Amalie All-Trac 245 which is an SAE10W-20 combo fluid but there are others available.  Rod
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