Caterpillar M318D 油圧ショベルのための139-9531 油圧ポンプ

The main pump powering the M318D serves as the heart of Caterpillar’s ​​high-performance hydraulic system. Utilizing a precision electro-hydraulic proportional control mechanism, the pump accurately converts engine power into hydraulic energy, meeting the demands of high-mobility, heavy-duty operations typical of wheeled excavators.

Key Technical Highlights:

Precise Flow Matching: The system combines negative flow control logic with load-sensing technology. When the operator initiates an excavation movement, the pump detects real-time changes in circuit pressure and adjusts the swashplate angle to distribute flow on demand; this significantly boosts operational efficiency and minimizes unnecessary fuel consumption.

High Pressure and Output: With a system pressure setting of 350 bar, the M318D maintains powerful breakout and lifting capabilities, even when tackling challenging tasks such as urban earthmoving and demolition.

Reliability and Cooling: Designed to handle the frequent transitions between road travel and active operation characteristic of wheeled excavators, the pump features a structurally reinforced design to withstand high-frequency load fluctuations. Its sealing components maintain excellent pressure resistance even during high-speed operation.

Intelligent Monitoring: The pump unit integrates seamlessly with Caterpillar’s ​​Product Link and Cat Messenger systems, providing real-time feedback on hydraulic pressure and flow status to facilitate proactive maintenance.

Guangzhou Jianming Machinery Equipment Co., Ltd.

With 20 years of solid practical experience, we are experts in the field of machinery power systems and components.

We began as a small machinery repair shop. Over the past two decades, we have accumulated a wealth of experience through successful projects and maintenance work worldwide. Thanks to our hands-on experience in solving complex mechanical issues, we have earned widespread acclaim and grown into a comprehensive enterprise employing over 200 professionals.

We deeply understand the challenges equipment faces under extreme conditions and possess extensive practical experience and expertise in the following areas:

Heavy Machinery Power Upgrades and Retrofitting: We provide customized engine retrofitting and replacement solutions for excavators, bulldozers, loaders, and other heavy equipment. We are proficient in major power systems, including brands such as Caterpillar, Kobelco, Yanmar, Cummins, Isuzu, Perkins, Deutz, and Volvo.

Mining Equipment Maintenance and Optimization: We offer professional repair, maintenance, and power optimization strategies specifically designed for heavy-duty mining equipment operating under high-load conditions.

Agricultural and Irrigation System Solutions: We assist farms in the efficient design and assembly of irrigation systems, as well as in troubleshooting and upgrading power units for various types of agricultural machinery.

Leveraging our extensive technical expertise, we are also a robust supplier of spare parts:

Comprehensive Machinery Parts Supply: With our deep understanding of maintenance, we prioritize quality above all else. We offer a wide, carefully curated range of parts for excavators and heavy machinery—covering hydraulic systems, fuel systems, internal engine components, and electrical systems—to meet all your one-stop procurement needs.

Our wealth of practical experience and robust supply chain system are our most valuable assets. Whether you are facing complex mechanical challenges or require reliable spare parts, Jianming Machinery has the expertise to help you succeed!