hi if anyone can help it would be greatly appreciated.

im currently working on a linde e14-01
serial h2x386w03457

fault codes showing
t861_L225
L286_L820

t421_l225
L286_L820

t421_L225
L286_L820

t861_L225
L286_L281

T921_T421

i kinda figure one of these relates to pump motor speed sensor, the truck runs fine until the pump motor ramps up full speed, the list of errors above have all come up on different occasions but figure as much info as possible helps come to a speedy answer.

today i swapped the speed sensor on the hydraulic motor with one in the drive to get different errors which i kinda expected

T312

T861_T312
L225_L861

T921_T821
T931_T421

T861_T312
T412_L225


any ideas guys?