First time i was thinking it îs the travel control, but when i switch the hose for y to z to switch direction, If it was the travel control it should drop the presure when is going forword but not îs still droping presure only on îs reversing, this îs 2 pedals Machines.
Could be the servo the piston for backword lousing presure and the travel control does not have enough presure for brakes and also for the engine speed. I also notice that the engine does not revs în revers like it revs în forword.