Re 12 GPM pump: A number of years ago, I swapped a 12 GPM pump to a 17 GPM pump in a 656 whiteface. Same hyd as a 504. However, the filter did not like the almost 50% increase in oil flow. The tractor hydraulic system surely worked well. To accomadate the increased flow, I needed the large capacity filter. It was too wide to fit into the housing. A little machine shop work to make a spacer and some longer attaching bolts solved the problem. Rather than put on another pump, try a 17 GPM. Before you do, however, just buy the bigger capacity filter and it will be self evident what I mean by a spacer. I had Farmall 504 serial 6844 SYFF, a C153 motor unit with a factory wide and a 2001 loader. Had no axle problems. Tractor was traded on an 806. It is now completly restored in the hands of a serious collector. Any questions - just post!!!!!.....QR
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Today's Featured Article - The Tractor Parade: Story of a Case SC - by Bernie DeLon. On a early fall morning back in 1994, I opened the newspaper and happened to spy an article about a local antique tractor club having their annual show that weekend.
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