Hi... ive been fixing ex2002-2 excavator before. but now i just encounter this kind of problem, when i removed solenoid 1 and 2 to let the pump go to full stroke.. to set the a sensor, i cannot get the correct voltage of the a sensor because the pump will only it will only move until 80% and its like the engine is loaded and black smoke coming out of the exhaust.. i already tried unscrew the unload valve... what could be the reason holding the pump to full stroke?? Please help
Angle sensor wiring or sensor. , Pump control relay wiring or relay, pump solenoid wiring/ solenoid dp sensor wiring or sensor. Im sure Im forgetting a couple
Normally swash plate will go to full stroke when there is an electrical problem... but my swash plate its like only 80% full when disable the 2 solenoid its like something is blocking inside the pump