Yes the gear knob is bugging me a lot tooDieselman wrote: ↑Sat Nov 21, 2020 7:06 pmThe only item that can affect the steering like this is the FDV (flow distribution valve), which diverts pressurised fluid either to the suspension/brakes, or the steering system.
High pressure, low flow to the suspension/brakes, low pressure, high flow to the steering.
Your last picture shows the FDV very clearly.
It's unlikely, but possible that the FDV has a stuck, or sticky shuttle, but that seems unlikely as you seem to be suffering loss of pressure to both systems. If the main system pressure drops try turning the steering a little as that should cause the shuttles to move and may rectify the fault.
The fault still appears like air entrained in the hydrauklic fluid. Try tightening the hose clamps a little, also check the suction pipe and spigot on the LHM tank.
Have you checked the 12mm pressure reief bolt on the regulator is tight?
On another note, I noticed your car has a peugeot gear knob fitted. You can still obtain the correct one from a citroen dealer. p/n 2403 E0
I should find someone breaking an xm for spares and go on a shopping spree.
I wasn't sure where exactly the regulator is. Couldn't find an exact diagram online. Is it accessible from top or I have to lift the car up?