Here is the bundle number you would need. It allows the system to dump pressure from one end of the cylinder to the other while maintaining the set pressure. This way you will not bend the opener arms. DO NOT TRY TO RUN WITHOUT IT!!! If you do and run over a hump or headland the openers on the high spot will try to carry the whole drill weight. I have seen bend arms and busted opener frames by not using the open center kit. When you use an open center tractor on a 750/1560/1590 drill it will not maintain the constant pressure on changing ground contours. You go over a hump the system will dump the oil if it goes over the set pressure. Then you will need to activate your SCVs after you are over the hump to recharge the system pressure. If your ground is fairly level it is not very hard to get used too. If you leave it engaged all of the time it will over heat the tractor hydraulics.
Open center hydraulic check valve: BN280593
This pilot-operated check valve traps oil to opener cylinders, maintaining preset position when tractor valve is neutralized.
Required if drill is to be connected to tractors with open center hydraulic system. May also be used with closed center hydraulic systems. If tractor valve is not neutralized on open center tractors, damage to tractor will result (heat buildup in the hydraulic system). Kit includes check valve, pilot line, and necessary hydraulic fitting for installation.
Bundle No. BN280593 Open center hydraulic check valve for single placement drills
I do not have the current price of the kit. The number is out of my drill setup manual.
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