Rotor_Man
Guest
The header lift valve has a plastic check valve that wears and gets chipped causing a slow or fast header drop depending on how bad. Had to replace it in my 1480 last season. Also if you have automatic header height control, a leaking valve(C) can do the same thing, valve (C) is not rebuildable so I removed it and plugged the line, I have no use for auto height control.