jdcoolidge
New member
- Joined
- Jul 27, 2009
- Messages
- 3
I am new to hydraulics so as usual have questions.
My tractor is an 18 hp diesel Yanmar 187D with an integral hydraulic pump.
I have been unable to find out what the actual GPM of the pump is, but installed an hydraulic log splitter using a diverting valve to insure full output to the splitter. Using the out stroke time I back calculated and the pump is putting out about 4.4 GPM. So for a one person operation, and with a locking retract cycle it works "OK". I suspect that for the amount of wood needed and for a multiperson operation a faster cycle time will be needed. There are several sources for PTO hydraulic pumps all with about the same range of specs. How do I determine the pump best suited for this particular application? The splitter has 1/2" ID hoses as are all the hoses and fittings I added to hook it to the tractor. $$$$ ouch. Is there any benefit to using a larger capacity pump at a lower rpm to get a faster cycle time, or am I better off to run a pump at the full PTO rpm (540) with higher engine rpm. My thought was that less fuel would be used running the tractor (and PTO) at a lower rpm. Splitter specs: Ram 3.5" Rod 1.5" Stroke 18.5" Thanks for any thoughts and help.
Duncan
My tractor is an 18 hp diesel Yanmar 187D with an integral hydraulic pump.
I have been unable to find out what the actual GPM of the pump is, but installed an hydraulic log splitter using a diverting valve to insure full output to the splitter. Using the out stroke time I back calculated and the pump is putting out about 4.4 GPM. So for a one person operation, and with a locking retract cycle it works "OK". I suspect that for the amount of wood needed and for a multiperson operation a faster cycle time will be needed. There are several sources for PTO hydraulic pumps all with about the same range of specs. How do I determine the pump best suited for this particular application? The splitter has 1/2" ID hoses as are all the hoses and fittings I added to hook it to the tractor. $$$$ ouch. Is there any benefit to using a larger capacity pump at a lower rpm to get a faster cycle time, or am I better off to run a pump at the full PTO rpm (540) with higher engine rpm. My thought was that less fuel would be used running the tractor (and PTO) at a lower rpm. Splitter specs: Ram 3.5" Rod 1.5" Stroke 18.5" Thanks for any thoughts and help.
Duncan