have a electronic b cummins . the throttle acts as if it is de rated until a hydraulic function is energized then throttle is normal. is there a interface to the engine ecm from the hyd. system?maybe a pilot signal? the pump unloader valve is controlling the pump pressure correctly. the engine is not pulling down. any leeds would be greatfull.
machine has no codes present
mljohn What is you email address .I can send you the schematics on it .