Details: There is a Cat 320 excavator in Guiyang. During the operation, there is a hot car phenomenon. The hot car will also be turned off. What is the reason?
Failure analysis:
1. It may be that the oil nozzle of the digging machine is blocked. Check the oil nozzle to see if the fault still exists;
2. Generally speaking, if the old machine has such a failure, it is generally necessary to calibrate the hydraulic pump. If it is a new car, it is recommended to replace the diesel filter to try it. If it is not possible, replace the diesel;
3. Also check if the air filter of the excavator is clogged. Clean the air filter to see if the fault still exists;
4. Whether there is a failure of the air intake system, resulting in insufficient air intake, and thus the phenomenon of excavator holding vehicle;
5. If there is a problem with the engine, it is generally caused by: failure of the oil circuit; failure of the gas circuit; failure of the fuel injection pump;
6. There are also common factors in hydraulics including: the spool of the NVC valve is stuck; there is a serious blockage in the bypass valve; and there is a failure in the intersection of the electro-hydraulic parts;
Troubleshooting:
Send the hydraulic pump of the excavator to the test stand for debugging; try to proofread the Caterpillar cat320 oil pump; repair the air intake system of the excavator; clean the air filter element of the excavator; repair the engine oil path, gas path and fuel injection pump of the excavator; Hydraulic system.
