On a splitter it would tipically be built into the valve, and would involve that 3rd hyd line you mentioned. With a stronger engine, you should be able to keep the engine running, but the ram stops because of max hyd pressure. The oil flows through the spring loaded pressure relief valve. It's basically a little valve with a spring holding it, the spring & any metal washers determine the pressure on many, while others have an adjustable screw instead of washers.comfortablynumb said:whats the pressure relief look like?
As to another question you had I didn't notice before, NO you can't use copper tube for hyd lines. This is 2000 to 2500 lbs of pressure we are talking about. You need special steel tube or the hyd hose with braided wire. Don't use water pipe fittings either - they don't cut it. You don't want to fool around here, this has the potential to cause harm. Hyd hose is a couple bucks a foot, how can copper be cheaper anyhow???????
Your control valve does not sound safe. There should be a center position where nothing moves. If yours drifts, you are set up to catch your hand in the splitter and cause some real injories. A new valve with detent in one direction is only a few bucks, check out Northern Tool, they specialize in wood splitter parts. What you have is not a good thing. Going through life without a hand is not priceless.....