ARE YOU ADJUSTING THE HEAD HEIGHT FROM INSIDE OF THE CAB ON THE lEFT SIDE OF THE SEATIJ IT SOUNDS lIKE YOU ARE AT THE HIGH END OF THE ADJUSTING and THE PIN IS BEING PUSHED IN ON THE VAlVE and THAT IS WHY THE HEAD IS GOING UP FOR YOU.
The header height knob is set the same as it has been.But the only way to get the head back down is to bleed the accumulator oil out through the hand valve like the inital adjustment.With that valve shut off I don't see how oil gets back in the bottle.I will check the bladder but I think it is ok.Thanks for suggestions.Chopper