Sounds like a better plan than me taking off the tire and spraying pb blaster in the valve.I could be waaaay off base, but I seem to vaguely recall my sales guy telling me to adjust that knob only when my 3-point was in the fully UP position. (I could also lock the 3pt up as well, if I wanted to)
That was months ago, so, I could be way off base.
Also, it's a BX not an LX I am referring to.
Couldn't hurt to try it....it's free to try !