This paper mainly describes three aspects of Sany 235-8s excavator engine failure and two diagnostic methods of Sany 235-8s excavator engine fault.
Sany there are three reasons for the failure of the 235-8s excavator engine:
1 circuit (ignition system, starting system, electronic control system, etc.).
2 fuel supply (oil supply system, air supply system, etc.).
3 mechanical aspects (crank link mechanism, valve train, etc.).
Sany two diagnostic methods of 235-8s excavator engine failure:
1 static diagnosis
Static diagnosis refers to the use of various diagnostic methods to diagnose the fault location and performance of engines under the condition of no working state.
For example, using universal meter to measure the resistance value of each electric control element, measuring the crankshaft clearance with micrometer, and using cylinder pressure gauge to measure cylinder compression pressure.
2 dynamic diagnosis refers to the use of various methods to judge the engine's failure mode under working conditions.
For example, the dynamic faults in the engine, such as the internal noise and vibration, the color of exhaust smoke, the power of the engine, are used to diagnose the internal noise and vibration of the engine.
