When excavators are excavated, machine friends often find various faults in the machine. For example, the excavator appears to be slow in movement of the whole vehicle. The faults must be checked in time, otherwise the faults will become more and more serious. Today, let's talk about the symptoms of slow excavator movement. You must pay attention to the following reasons!
1. The hydraulic pump is severely worn, causing internal leakage.
2. Check whether the pressure is normal. You may need to adjust the flow and torque of the pump and valve.
3. Check the speed sensor. If the speed sensor is damaged or has poor contact, the computer version cannot receive the signal, and the electromagnetic proportional method cannot be turned on, causing the entire excavator to slow down.
4. There is a problem with the EPPR valve of the main pump. Check whether the EPPR valve pressure is too high?
5. Slow movement means that the hydraulic oil flow is too small. The main pump swash plate may be stuck at a small angle, or the main pump may be worn and leak, or the hydraulic oil may be dirty and the oil return filter may be clogged, or the control valve may be seriously leaking.
6. If the hydraulic oil temperature is high and the whole vehicle moves slowly, it may be that the oil pump is not working. If the oil temperature is high, the oil will become thinner. It may be that the oil pump seal is not good, or the pressure limiting valve is not sealing well.
7. The excavator's warm-up operation slows down. Check whether the engine speed is normal when the engine is in hydraulic overflow state. Is there black smoke and whether the engine is being held back? For new vehicles, check the hydraulic filter element and fuel filter element; for old vehicles, check whether there is black smoke and whether the engine is held back. , it is necessary to check the working condition of the fuel pump and the flow rate of the hydraulic pump.
8. If the excavator suddenly slows down, it may be due to a high-speed solenoid valve failure, a hydraulic pump regulator failure, or a pilot pressure that is too low.
The entire excavator moves slowly and involves a lot of precision parts. For experienced drivers, inspection and handling will be very difficult. All novices who cannot even recognize all the parts must operate with caution. In order to troubleshoot efficiently and quickly, it is best to find a relevant professional excavator maintenance master to help you solve it!
