![](http://www.newagtalk.com/mapdots/jonhagen.jpg) Hagen Brothers farms,Goodrich ND | There is such a pressure relief valve in the header lift plumbing of my IH 1480. On the 750 Massey, I don't know ? One would suspect that it also would have some sort of relief valve,but knowing this guy,he may have defeated the relief valve to try to keep that heavy header in the air with only two lift cylinders. :) |