Hydraulic balance valve Excavator hydraulic cylinder valve core CXJA-XCN

Fault diagnosis sequence

The order of fault diagnosis of the hydraulic transmission system of the excavator is: understanding the working conditions of the equipment before and after the failure - an external inspection - trial observation (fault phenomenon, on-board instruments)- internal system inspection, instrument inspection system parameters (flow, temperature, etc.)- logical analysis and judgment - adjustment, disassembly, repair - test - fault summary and record.
There are many kinds of excavator failures, according to the characteristics of different models, make full use of the equipment's own monitoring system,
Specific problem specific analysis, master the effective fault analysis method, according to the hydraulic system schematic diagram, the total oil circuit is divided into several branches according to the work function, according to the fault phenomenon, follow the order from outside to inside, from easy to difficult, and exclude the branch one by one. In case of more complex comprehensive faults, the fault phenomenon should be carefully analyzed, and the possible causes should be excluded one by one.
3 Precautions for troubleshooting
1) Without careful analysis and determination of the location and scope of the fault, do not disassemble and adjust the unit
Part, so as not to cause the expansion of the fault range and produce new faults.
2) Due to the diversity and complexity of the fault, other factors should be considered in the process of troubleshooting, such as mechanical,
The role of electrical failure.
3) When adjusting the components, pay attention to the amount and amplitude of adjustment, and each adjustment variable should be only one, so as not to interfere with other variables