Total preasure of the Pump?

NorthernMainer · Mar 13, 2008

My tractor list the total output as 13.3 gpm and I am toying with the idea of a woodsplitter that runs off the tractors hydralics but then see that only approx 8gpm is for the system ,and 5gpm is for the powersteering . My questions is when you are not moving the steering, do you get the whole 13.3gpm to use; or just the 8gpm period??? I have a nice 4 1/2" X24" HD tierod end cylinder that would make a beauty on a splitter but am now starting to wonder if I wouldnt be better off to go conventional and buy a 16gpm pump and a Honda engine???? A pto pump is way toooooo expensive and if the tractor only delivers 8gpm total you could watch a movie waiting for it to cycle that big clyinder???? Any experts out there on JD's pump systems???
I had a guy yesterday that seams to be an expert on ANY subject tell me that he was 99% sure that you get the 13.3 when at rest but he is wrong about 98% of the time on most other topics

Soundguy · Mar 13, 2008

Does your tractor have 2 pumps.. or a single pump with a priority valve for the PS... just follow the lines from the cyl and see where they go.

many tractors have a single pump with an option for 2 pumps.. or have a dedicated PS pump.. etc.

soundguy

SPYDERLK · Mar 13, 2008

NorthernMainer said:
My tractor list the total output as 13.3 gpm and I am toying with the idea of a woodsplitter that runs off the tractors hydralics but then see that only approx 8gpm is for the system ,and 5gpm is for the powersteering . My questions is when you are not moving the steering, do you get the whole 13.3gpm to use; or just the 8gpm period???
I had a guy yesterday that seams to be an expert on ANY subject tell me that he was 99% sure that you get the 13.3 when at rest but he is wrong about 98% of the time on most other topics

Try checking it empirically. Block your fronts off the ground and steer while raising and lowering the FEL. Does FEL speed change?
larry

john_bud · Mar 13, 2008

Nomally on smaller tractors there is one pump and the flow is split with a priority valve so that a dedicated amount is always sent to the steering. So you most probably only will have the 8 gpm for any implement.

I would bet a warm beer that your buddy is wrong....

jb