First, the comprehensive analysis is performed according to the various aspects of the mastery, and it should be found from the most likely causes, and then look for a rare reason. The possibility of denying certain systems, institutions, or components, reduces the fault analysis range, and finally determines the main causes and parts of the fault to exclude.
The following introduces several simple diagnosis methods:
Non-disassembly check
In order to accurately determine the fault, avoid unautreating some complex parts, some special instrument equipment, direct or indirectly check the technical state of the relevant part, that is, non-disassembly check. For example, use a pressure gauge and connect attachment, you can check the cylinder pressure; check the fuel injection pump pressure; check the pressure of the lubrication oilway.
Comparative law
Replace the components on the engine with a technical state normal component, or the same components on the engine are interchanged, and the technical state of the component is changed by comparing the change of the fault phenomenon before and after the replacement. For example, on the multi-cylinder engine, sometimes the two cylinders of the injector is interchanged, see if the fault is transferred, to determine the technical state of the injector.
Part of the stop method
Short-time stops a certain part or a part of the work, observes the changes in the fault phenomenon to determine the part of the fault. If the engine's failure is analyzed, it is often used as a "broken cylinder" (suitable for multi-cylinder engines).
Trial anti-expert
Try to change the working conditions or technical status of a part, observe the changes in the fault phenomenon to determine the parts of the fault. For example, when the piston, the piston ring and the cylinder wall are severely worn, and the cylinder can be inserted into a small amount of oil in the cylinder.
Conclusion
At present, the hydraulic excavator has been widely used. Generally, the common faults of the excavator engine are expressed in these aspects. As the excavator is used, some universal failures often appear in the construction operation, and therefore, the technical quality of the team should strengthen the technical quality of the team And have advanced excavator repair equipment, reduce the occurrence of faults, and ensure the smooth progress of the project construction.
