Drive issue hydrostatic, 906H SN CAT0906HCSDH00220 unit creeps in reverse while in neutral, very jerky when in forward or reverse, very slow drive in forward. There is a single pressure tap near the forward reverse control solenoids, pressure climbs to 120 psi max in ten seconds at wot in gear.any help would be greatly appreciated.
A4 Rexroth? You can try adjusting adjusting the center position for the swash plate but sounds as if the internal linkage is worn /lot of backlash. How is the speed controlled, the coils are proportional or is has the automotive style regulator in the pump?