Excavator Hydraulic Main Pump 391-9442 3919442 for Caterpillar 312D2 312D2 GC 312D2 L 313D2 313D2 GC ,High-Quality Hydraulic Pump,Construction Machinery Parts Manufacture

 

391-9442 3919442 is a core component of its hydraulic system. Its core functions include:

• Dual-Pump Power Adaptation -  The main pump (variable displacement piston pump) delivers high-pressure hydraulic oil to drive executive mechanisms such as the boom and arm to complete excavation operations; the pilot pump provides low-pressure control oil for precise regulation of the main pump's variable mechanism and directional valves.
• Intelligent Regulation Mechanism - Achieves stepless flow regulation through swashplate angle adjustment, combined with a pressure compensator valve to stabilize system pressure, adapting to power requirements of various working conditions.
• Maintenance & Fault Handling - Regular checks of oil level and quality, along with filter replacement, ensure stable operation; for common faults such as insufficient pressure or flow, quick troubleshooting can be done by cleaning filters, inspecting and repairing the variable mechanism or seals.

Strategically located in Guangzhou's Huangpu District, approximately an hour from Baiyun International Airport, Tieqi has been a dedicated specialist in engineering machinery hydraulics for nearly 15 years.

Driven by our core values of "Pragmatism and Progress," we are committed to delivering practical solutions and upholding our responsibilities. This principle-driven approach defines all our operations and client partnerships.

In China's excavator hydraulic assembly sector, our efficient execution and rigorous approach to manufacturing every product to meet over 95% of original performance specifications have built widespread trust. This has made us a destination for industry peers and clients seeking knowledge and reliable supply, and we take pride in our role of continuously elevating production standards in China.

We are proud to set the standard for hydraulic manufacturing in China, a commitment recognized by our global clientele in the mining, construction, and trading sectors. We invite you to visit our Guangzhou facility to evaluate our quality processes firsthand.

Our capability is backed by a ready inventory of over 500 assembly types, providing access to more than 6,000 different parts. Hydraulic pump, control valve, travel, and swing assemblies are our core products, with a distinct advantage in large mining excavator components and hard-to-find items.

Our 4,000-square-meter factory in Guangzhou is equipped for professional manufacturing, precision assembly, rigorous testing, and quality certification, ensuring reliable performance and timely delivery for every order.

By integrating top-tier Chinese hydraulic brands and supply chains, we provide cost-effective, convenient, and scalable one-stop solutions tailored to diverse machinery and operational needs. Our ability to expertly meet complex client requirements remains a cornerstone of our service.

For large items, we use sturdy plywood crates secured with metal fasteners for added stability. Inside, the products are cushioned with bubble wrap and secured with wooden braces, while special attention is given to protecting vulnerable parts. Externally, the crates are reinforced with high-strength PET plastic strapping and wrapped in highly waterproof black film. All these measures are taken to ensure that the products reach our customers safely and securely.