For the sake of environmental protection, most excavators are now electronic fuel injection vehicles. We often encounter various alarm codes, and these alarms are mostly caused by sensor or solenoid valve failure. The following are the positions and functions of ten sensors and solenoid valves on the engine. When an alarm code appears on the excavator and the meaning of the code is understood, it can be checked and replaced according to the position of the sensor and solenoid valve.

The suction control valve (fuel inlet metering valve) is one of the most important components in the diesel engine fuel supply system, and it is the most important part of the throat.