Post-Treatment Method for Wear of Excavator Hydraulic Pump

Hydraulic pump is for the hydraulic system to provide a certain flow and pressure of hydraulic power components, is the core components of the hydraulic system is indispensable. Common excavator no power, slow speed, hydraulic pump rattling and other problems are the obvious manifestation of the hydraulic pump failure, which, in addition to part of the daily maintenance is not timely, there is also the hydraulic pump itself caused by wear and tear. Timely maintenance and repair of excavator hydraulic pump is very important to reduce the energy consumption of the hydraulic system, improve the efficiency of the system, reduce noise, improve the performance and ensure the reliable operation of the system. This article will explain the excavator hydraulic pump wear treatment method, hope to help you.

1. Excavator hydraulic pump wear three stages

(1) initial wear stage: hydraulic pump in the manufacturing process, the parts of the metal surface has a certain degree of microscopic unevenness, in the metal surface occurs at the beginning of the relative movement, the hydraulic pump between the parts of the relative high-speed movement, at this time the friction between the friction will produce a slight friction wear, parts in the initial wear stage.

(2) Normal wear stage: after a period of time, the friction between the friction sub-generation of a new accuracy level of higher roughness, wear and tear slows down. Enter a relatively long period of stable use.

(3) Severe wear stage: In this stage, the metal material reaches the rated life of the fatigue cycle, and the fatigue layer is produced on the metal surface. Fatigue layer in the use of hydraulic pumps at high temperature and high pressure, the metal surface layer is prone to granular detachment, so the wear and tear grows dramatically, resulting in parts failure. At the same time, the hydraulic pump of the three pairs of friction parts between the wear, so that the gap between the parts increases, the hydraulic pump leakage increases, the oil temperature also rises accordingly.

2. How to let judge whether the excavator hydraulic pump is seriously worn, you can check from the following aspects:

(1) Check the internal leakage of the movable arm cylinder. The easiest way is to raise the movable arm to see if it has a significant free fall. If the drop is obvious, disassemble the cylinder to check, and the seal should be replaced if it is worn.

(2) Check the maneuvering valve. First clean the safety valve, check whether the spool is worn, such as wear should be replaced. If there is still no change after the installation of the safety valve, and then check the manipulation valve spool wear and tear, the clearance limit is generally 0.06mm, wear and tear should be replaced.

(3) Measure the pressure of the excavator hydraulic pump. If the pressure is low, it is adjusted, the pressure is still not adjusted up, then the hydraulic pump is seriously worn.

When the excavator hydraulic pump is worn out seriously, it should be repaired and the related parts should be replaced in time. Hebei Coro 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, Coro 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.