A Caterpillar CAT320 excavator has a hot car phenomenon during operation, and the hot car will stall. What is the reason.
Fault analysis:
1. It may be that the oil nozzle of the excavator is blocked. Check the oil nozzle to see if the fault still exists;
2. Generally speaking, if it is an old machine that has such a fault, it is generally necessary to calibrate the hydraulic pump. If it is a new car, it is recommended to replace the diesel filter first and try it. If it doesn't work, replace the diesel;
3. Also check whether the air filter element of the excavator is blocked, and clean the air filter element to see whether the fault still exists;
4. Whether there is a fault in the air intake system, which leads to insufficient air intake, thus causing the excavator to hold the car;
5. If there is a problem with the engine, it usually comes from: oil circuit failure; Air circuit failure; Fuel injection pump failure;
6. There are also common hydraulic factors, including: NVC valve spool stuck; The bypass valve is seriously blocked; There is also a fault in the intersection of electrohydraulic;
Troubleshooting:
Send the excavator hydraulic pump to the test bench for commissioning; Check Caterpillar CAT320 oil pump and try it; Overhaul the air intake system of the excavator; Clean the excavator air filter element; Overhaul the oil circuit, air circuit and fuel injection pump of excavator engine; Overhaul the hydraulic system of Caterpillar CAT320 excavator.
