8 horsepower running a hydraulic pump with just one 5/8" wide belt can make around 4 GPMs @ 1800 PSI if you're lucky. That's not much when it comes to a log splitter. I still have a splitter I built 35 years ago with a Bolens garden-tractor engine and a pump and cylinder off a John Deere 350 crawler-loader. Engine is an S8D Wisconsin. Cylinder is 4" diameter. Pump is a 2.3 cubic inch Cessna. Just to get any wood split I had to put a 3" pulley on the engine and a 14" pulley on the pump. Basically a 4.6 to 1 ratio and even with a 5/8" belt - it slips in tough wood. Note also that the engine runs 3600 RPM. So the pump is only running around 800 RPM. That makes it working as a 5 GPM pump. As long as the 5/8" belt is dry - the engine stalls in tough wood instead of the belt slipping. 8 horsepower is not enough to run a splitter with a single-stage pump unless you've got a 5" or bigger diameter cylinder.
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Today's Featured Article - Restoration Story: 1929 McCormick-Deering 10-20 - by Randal Simmon. On July 4th 1998 my dad and I was sitting on the front porch when he said that he was going to sell his two 10-20's to a junk man. He said that the junk man was going to give him $500 for both of them but he hadn't received the money for them yet. So I went into the house and wrote him a check for $500 and bought them myself and said now they are mine. He had bought them about five years before thinking that he was going to restore them himself. After five years sitting in the barn, he changed h
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