It has been about 12 years since I first installed my 3rd function. I have a new tractor so I have to do it again. There is something I cannot remember about the valve. I have an open system. For a grapple, do I need a tandem center valve or open center. If my memory serves me, and it usually doesn't, a tandem center will allow the work ports to stay shut thus keeping the grappled closed with tension. With an open center valve, pressure will release when I go to neutral (not push the button)? Am I correct?
oldnslo
Super Member
Yes, you need a tandem center valve if it is a D03 or D05 subplate mounted valve.
kennyd
Advertiser
Yes, a tandem center valve has the work ports blocked in neutral, a true open center valve has them open to the tank-good for running motors.
But, many sources will use the term open center in place of tandem center.
But, many sources will use the term open center in place of tandem center.