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PTO hydraulic pump

A

andyinct

Member
I was running my wood splitter off the front mount pump on my tractor. The pump froze up over the winter so I want to get a PTO pump for the splitter. I only need hydraulic power for the splitter. The cylinder on the splitter is 3" bore. What size pump would I need? Aluminum or cast iron? Thanks
 
Did you take the front pump off? I used to have a formula to measure up a pump and then you could determine the GPM. If you did that you would know what size pump you would need. If your tractor has a 540 PTO your GPM will need to be twice the size of the front pump unless the PTO pump runs faster. Does the system have a filter? Cast iron pumps are normally tougher, roller bearing pumps eat more contamination than bushing pumps, but bushing pumps will take more pressure. Your turn.
 
I didn't take the front pump off yet - I don't think any numbers on it, it is off a 1955 Ford. My PTO is 540 and I do have a return filter on that I put on when I got the tractor about 10 years ago. Before that the pump had no filter so who knows what care it received. I want the PTO pump so when the tractor is doing other tasks I don't have the pump running constantly.
 
How long is the cylinder on the splitter??? We can then figure how much oil it takes to extend the cylinder and then work backwards to what flow you need.
 
Here's a calculator: http://www.baumhydraulics.com/calculators/cyl_speed.htm

It will give you an idea what to expect, just play with the pump GPM.

Remember to carefully calculate the GPM of the pump at the RPM the PTO will actually be turning it, not the rated GPM of the pump.
 
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