Posted by jdemaris on October 21, 2014 at 06:56:31 from (70.194.11.149):
In Reply to: Log Splitter Advice? posted by BobH in NH on October 21, 2014 at 05:58:25:
You need a pump 2 or 3 times bigger. A tail-gate pump is too small to run at 300-545 RPM and run a 3 ½ to 4 ½” log splitter cylinder. I use a three point splitter with a Prince PTO pump and it works very fast with the engine running around 1200 RPM. A typical backhoe/loader uses a pump that flows 23 GPM @ 1700 RPM. Usually a pump that moves 2.1 to 2.3 cubic inches of oil at every revolution. A pump run at 1/3 that speed needs to be MUCH bigger. My Prince pump is rated at 7.8 cubic inches per rev. Hooked to a 27 horse tractor – it can flow 17 gallons per minute @ 2000 PSI.
Note: A pump making 7 gallons per minute hooked to a 4” cylinder, with a 1.5” rod, and 30” long will cycle out in 2.1 seconds and cycled back in 2.5 seconds.
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