PSVL-42CG E303.5 KX121 E35 Overheating Hydraulic Main Pump

KYB original PSVL-42CG E303.5 KX121 E35 Overheating Hydraulic Main Pump Repair Excavator

The hydraulic pump is a critical component in excavators, responsible for converting mechanical energy into hydraulic energy. It supplies high-pressure hydraulic oil to various actuators (such as hydraulic cylinders and motors), enabling smooth and efficient operation of the excavator. High-quality hydraulic pumps ensure durability, energy efficiency, and precise control, making them essential for construction, mining, and other heavy-duty applications.

The hydraulic pump is the heart of an excavator’s hydraulic system, directly impacting performance and efficiency. Understanding its working principle, structure, and maintenance requirements helps in maximizing productivity and minimizing downtime. Investing in high-quality hydraulic pumps and following proper servicing protocols ensures long-term reliability in demanding construction environments.

Hydraulic pumps function through positive displacement, where mechanical rotation forces fluid movement. The process involves:

• Suction: Drawing fluid into the pump chamber.

• Compression: Pressurizing the fluid by reducing chamber volume.

• Discharge: Delivering high-pressure fluid to the hydraulic circuit.

Common pump types:

• Gear Pumps – Robust and economical for medium-pressure systems.

• Piston Pumps – High-pressure, high-efficiency performance.

• Vane Pumps – Smooth flow with moderate pressure output.

GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service.

Our main products are Excavator Hydraulic spare parts, Hydraulic pump, Swing motor, Travel motor, Final drive, Swing gearbox, Travel gearbox, Control valve,Monitor,Controller, Hydraulic cylinder and other hydraulic items with genuine and aftermarket quality. Until now, our products enjoy high reputation all over the world and have been exported to more than 150 countries and regions, spreading all over the Middle East, Southeast Asia, Africa, North America, South America, Europe and Oceania with its own brand "Belparts" are widely acclaimed by foreign customers.

In February 2023, Belparts Yunnan Tourism Team Building

In April 2024, Belparts participated in the Brazil Construction Machinery Exhibition and visited local clients in Brazil.

In April 2024, Belparts participated in the French Construction Machinery Exhibition and visited clients in France and Spain

In May 2024, Belparts Travel Thailand