Hitachi excavator controller 9260333 main pump control computer board

9260333 is a dedicated main pump controller for Hitachi excavators, responsible for accurately controlling the flow and pressure output of the hydraulic main pump, and coordinating the operation of the entire hydraulic system. Common fault phenomena: 1. Hydraulic action is weak and the speed significantly decreases. 2. The main pump output is abnormal and the power is insufficient. 3. The instrument displays pump related fault codes. 4. The whole machine action is not coordinated or there is impact. 5. Communication failure of the controller, unable to control normally. 6. Poor matching between the engine and hydraulic, increased fuel consumption. The main pump controller is the core control unit of the hydraulic system, and damage will directly affect the operating efficiency and power performance of the whole machine. It is recommended to replace it in a timely manner and confirm the program matching.