I just bought a Great Plains No Till drill. According to the Great Plains service tech, the flow rate through the depth control valve on the drill which sets the coulter depth is not to be more than 8 gpm. According to books on my 2-85 and 2-105, the tractor hydraulic flow rate is 22 gpm. Can this be reduced by the manifold restrictor valve ? If so, how do you measure the flow rate to set the manifold restrictor valve to what Great Plains recommends? If not, then I am guessing a flow restrictor has to be installed in the drill's hydraulic line prior to the depth control valve?
I bought the drill used at an auction and did not know about this requirement. I doubt that the previous owner did either. The current manual does not mention any restricted flow requirement. The previous owner was strictly no till and never used the depth control valve. He had rotated the depth stop arm so that it never contacted the pin in the depth control valve and planted with the coulters at maximum depth. I do a combination of tilled, min-till and no till planting so I wanted to be able to adjust the coulter depth. I called the factory to get information on how to set up the depth control system and this is when I was told about the reduced flow rate.
Thanks for any advice.
I bought the drill used at an auction and did not know about this requirement. I doubt that the previous owner did either. The current manual does not mention any restricted flow requirement. The previous owner was strictly no till and never used the depth control valve. He had rotated the depth stop arm so that it never contacted the pin in the depth control valve and planted with the coulters at maximum depth. I do a combination of tilled, min-till and no till planting so I wanted to be able to adjust the coulter depth. I called the factory to get information on how to set up the depth control system and this is when I was told about the reduced flow rate.
Thanks for any advice.
