I'm working on the same project. Five years ago I bought a Northern 3 pt. log splitter. I think it's a 30 ton model. but not sure. It's the type that can be used horizontal or vertical. It's a great splitter works well, it could be just a little faster. The splitter normally sits in my pole barn where the split fireword is stored. Now the splitter just sits on 3 large logs and I run hydraulic hoses from the splitter to the tractor. This causes problems because now I can't haul logs to the pole barn unless I disconnect the hydraulic hoses. So now the plan is to make the splitter a stand alone self contained unit. I have a old 10
HP engine off a riding lawn mower I scrapped. Before I scrapped the mower I also salvaged the fuel tank, throttle cable, starter relay and associated wiring harness. Last winter I collected a 15 gallon hydraulic tank, a 13
gpm two stage pump and most of the hoses and fittings. I'm currently looking for a small trailer to mount it on. A jet ski trailer is perfect, but the used ones around here are $200.00. A little too pricey for my project. Since grass cutting season is back I have kind of put this project on the shelf for awhile. Plans are to be able to mount the splitter on the small trailer with the pump/engine -OR- use the spltter on the 3 pt. hitch. I would like to be able to back the tractor up to the trailer and just lift the splitter off using the 3 pt. hitch. I'm still currently in the engineering stages on the mounting. I would like to be able to tilt the splitter up to the vertical position. To mount it high enough on the trailer to do this really shifts all the weight ( center of gravity) high on the trailer, which would really make the trailer prone to flipping over. So I may scrap that idea and only use it in the horizontal position.
Keep us posted on your progress. I'm no hydraulic expert, but I'm willing to help you all I can.
Thanks...........have a Happy 4th of July.