The math is simple. Assuming a 3.5" cylinder and a 20" stroke
- Volume of the cylinder = (1.75)2 x 3.1416 x 20 = 192 cubic inches.
- So you need 2 x 192 = 384 cubic inches of oil to cycle the cylinder one time.
- There are 231 cubic inches in a a gallon so each cycle requires 384/231 = 1.67 gallons.
- At 2.5 gallons per minute from teh OEM pump your cycle time would be 1.67/2.5 = .67 minutes = 40 seconds
- Your splitting force will be 1500 PSI x (1.75)2 x 3.14.16 = 14,400 pounds = 7.2 tons
That is doable but painfully slow. I have a 4" splitter I run on my Kubby which makes 4 GPM. I poop out pretty quick so it's quicker than me swinging a maul but not by much. With good straight grain wood that you can split with short strokes it's not too bad. With twisted or knotty stuff that requires a full stroke it is slow going. You really need a flow rate closer to 10 GPM to get a decent cycle time. I can do that with one of the larger live hydraulic kits for about the cost of a PTO pump. If you want to go just remotes for the splitter and skip the live hydraulics it's a couple hundered dollars less.