Excavator Moves Slowly and Weakly, May Be a Problem with the Hydraulic Pump

Excavator hydraulic system is a system based on the principle of hydraulic pressure to realize power transmission and control. It uses the liquid medium (usually oil) as the energy transfer medium, through the hydraulic pump will be converted into mechanical energy hydraulic energy, and through the hydraulic cylinder, valves and other hydraulic components will be converted into mechanical energy, to achieve the excavator's various functions. When the excavator appears to move slowly and powerless failure, may be the excavator hydraulic pump failure, need to repair in time.

1. All movements are weak

If all the movements of the hydraulic excavator are weak, it is likely that the oil circuit is blocked or the hydraulic pump is faulty: you can use a pressure gauge to test whether the pressure of the main relief valve is lower than the standard, in order to determine whether the main relief valve has a fault. If it is determined that the main relief screen is malfunctioning, the main relief screen needs to be removed and cleaned or replaced. If the pressure of the self-pressure reducing valve is lower than the standard value, it can be determined that it is faulty and needs to be cleaned and repaired. If the excavator hydraulic pump failure, it will directly lead to insufficient pilot pressure, resulting in the handle or foot valve control oil circuit can not control the distribution valve stem completely open, which will lead to all the movements will be slow and weak. It needs to be repaired in time.

2. The whole machine digging weakness

If the engine of the hydraulic excavator is normal, but there is still a weak digging condition, then there may be a leak in the hydraulic main pump. At this time, you need to disassemble the hydraulic pump for pressure testing, and then repair according to the test results. In addition, the pilot pump also needs to be checked to ensure that it can provide sufficient flow. If the temperature is found to be normal when digging strong, high temperature when digging weak, can determine the hydraulic main pump failure, should be thoroughly repaired or replace the hydraulic main pump.

3. Lifting powerless arm

Hydraulic excavator work, if only the moving pipe lifting powerless and other actions are normal, indicating that the hydraulic system pressure can be guaranteed, to exclude the possibility of total safety valve, the work of the main pump failure, at the same time can be excluded from the oil filter and the oil quality has the possibility of inter-title. At this time, the failure occurs in the moving arm, need to check the moving arm sealing elements, oil pipe and valve components, to confirm whether the connector is loose, oil pipe leakage, and then timely replacement of damaged components.

When the excavator hydraulic pump is seriously damaged, it should be repaired and the related parts should be replaced in time. Hebei Keluo Construction Machinery Co., Ltd. is a trustworthy company that strictly follows European standards and German quality. Whether you need cylinder heads, cylinder blocks, cylinder liners, pistons, camshafts, oil pumps, generators, water pumps, air compressors, fuel injectors or fan oil seal gaskets, we can meet your needs. In addition, Keluo has established good cooperation with customers all over the world, not only because we have been deeply cultivating in this industry for more than twenty years and have rich experience in production, but also because of the good quality of our products and after-sales service. If you want to buy related products, we will be your best partner.