Paddy, I've read through this thread several times and I keep coming up with the same question that I have not seen answered. What happens with a partial lift using the position control? Let's say that you only move the lift control to the half-raised position. When you bump the FEL joystick, does the 3PH raise to exactly that 1/2 raised position and stop as it is supposed to do? Then, when the lift stops (hydraulic position control "nulls") the lift will not move up more until the FEL is bumped? If that's the case, what would happen if while the lift was actually still moving, you move the position control to another position (up or down)?
I guess I'm confused as to whether the problem occurs only at the lowest position or at any position of the 3PH when the circuit matches the lever position and stops moving. If it is the latter, can you lower the lift handle some and then, as the lift drops, stop the lowering by raising the position control handle? What if you then raise the position lever? It seems that only the FEL shock causes the circuit to operate. Normal lowering of the lift and stopping would also cause a slight spike in pressure, but that seems not to cause the raise to operate like it does when the shock is from the FEL.
Are you testing the 3PH with a load on it (boxblade?) or just the lift arms?
I know this is a lot of questions, but from your description, I started thinking that when the position control works, it works until the lift matches the position and then won't move up more until you bump the FEL. It will lower just fine, but to get it to raise more, you have to bump the FEL. When the 3PH does raise, it has all it's normal lift power, but only until it matches the lever's position. Then you have to bump the FEL to get the lift valve to go off of open-center and lift. Is that about correct?
