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Analysis of common problems of excavators

** The holding of the excavator is one of the faults that users cannot ignore. What are the common factors that cause the holding of the problem? Here are 8 reasons for everyone. **

1. Insufficient engine air intake

When the air intake of the excavator’s engine is insufficient, it can also cause the car to hold back. There are many reasons for insufficient air intake, such as serious wear of the supercharger, incomplete operation of the supercharger due to clogging of the air filter, and small exhaust gas leakage from the exhaust branch pipe. The supercharger needs to be replaced when necessary.

2. Holding the car due to heavy load

Insufficient fuel supply is also one of the reasons that cause the excavator to hold back. Generally, when the engine works under heavy load for a long time, insufficient fuel supply will occur. At this time, you can adjust the pump flow to eliminate the hold-up, and remember not to work under heavy load for a long time.

3. The engine power does not match the hydraulic pump power

Of course, the failure of holding a car is closely related to the engine, and the holding of a car is generally caused by a decrease in engine power. If the engine power is lower than the power required by the hydraulic pump, check the fuel system and air intake system for problems. In addition, the problem of the oil pump will also cause the engine power to drop. Usually, it is necessary to calibrate the oil pump and replace the plunger nozzle.

4. The phenomenon of holding the car due to abnormal circuit

The oil circuit inspection is important, and the circuit must not be forgotten. Sometimes when the circuit is abnormal, it will also cause the machine to stop the car. When the car is stopped, first check whether it is the engine problem and the hydraulic system problem. If both are ok, you need to check whether the electrical components are abnormal.

5. Oil problem

Excavator stalling failures are related to oil products. Excessive oil impurities can cause blockage of the oil circuit, clogged filters, too much impurities in the fuel tank, and reduced engine power. Long-term use of oil with more impurities will damage the excavator and cause the vehicle to hold back. In addition, if the selected oil type is inconsistent, the installation of incompatible parts may also cause the car to hold back. It is recommended that you choose regular accessories and high-quality oil.

6. Fuel system problems

If long-term use of inferior oil products causes a large amount of impurities at the bottom of the oil tank, the oil tank should be cleaned regularly, and the oil pipes and the connections of the oil lines should be cleared. In addition, the oil-water separator should not be ignored. The drain valve at the bottom should be opened regularly to discharge water, otherwise excessive water storage will cause the excavator to hold back the car.

7. Parts wear and aging

In the process of troubleshooting the excavator holding the car, the wear and aging of the components must not be ignored. When the engine and pump power is no problem, you also need to check whether the engine cylinder liner piston is worn or not, whether there is any leakage of oil and air damage in other parts of the engine and hydraulic system. If you find the problem, you need to solve it in time.

8. Hold the car caused by dirty big pump regulator

When working for a long time and ignoring the grease stains formed around the large pump regulator, the regulator is blocked, causing the large pump regulator to fail to work normally, and causing the phenomenon of holding back the car. At this time, it can be removed and cleaned for debugging or replacement.

Summary: The above briefly summarizes the eight common reasons why the excavator is holding the car. Finally, I remind you all operators that when you find that the excavator is holding the machine malfunction, you must promptly repair and eliminate the excavator to ensure that the excavator can be used normally.

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