Product Overview

This high-quality remanufactured fuel injector, OEM number 557-7637 / 5577637, is a direct replacement for Caterpillar C9 diesel engines. Designed specifically for heavy-duty applications such as the Cat 320D excavator, this injector is engineered to restore engine performance and fuel efficiency. Our products are sourced from a professional manufacturing hub in Shandong, China, and are shipped globally to major markets including North America, Europe, the Middle East, and the Asia-Pacific region.

Key Features & Benefits

• Precision Remanufacturing: Restored to meet or exceed OEM specifications, ensuring reliable fuel atomization and combustion.
• Durable Construction: Manufactured from high-grade steel to withstand extreme pressure and temperatures within the diesel injection system.
• Enhanced Performance: Improves engine power output, reduces fuel consumption, and minimizes exhaust emissions.
• Rigorous Testing: Each unit is pressure-tested and flow-matched to guarantee consistent performance across all cylinders.
• Cost-Effective Solution: Offers a reliable alternative to new OEM parts without compromising on quality.

Technical Specifications

OEM Cross-Reference

This injector is a direct replacement for the following OEM part numbers:

• 557-7637 (Caterpillar)
• 5577637 (Caterpillar)

Note: No alternative cross-reference numbers are available for this specific part.

Compatibility

• Engine: Caterpillar C9 (Diesel)
• Equipment: Cat 320D Excavator, 320D L, and other C9-powered machinery.
• Application: Diesel Fuel Injection System.

Global Supply & Distribution

We offer worldwide shipping with fast delivery to major ports and industrial centers. Our logistics network ensures reliable supply to:

• North America: Los Angeles, Houston, Chicago, Toronto
• Europe: Rotterdam, Hamburg, Antwerp, Felixstowe
• Asia-Pacific: Singapore, Shanghai, Sydney, Dubai
• Middle East & Africa: Jebel Ali, Durban, Lagos

With extensive export experience and compliance with international trade regulations, we ensure your order arrives safely and on time.

Quality Assurance

• Manufacturing Standards: All injectors are remanufactured following strict ISO and OEM quality guidelines.
• Testing: Each injector undergoes 100% flow testing, pressure calibration, and leak checks before shipment.
• Warranty: Backed by a 3-month warranty against manufacturing defects.

FAQ

Q1: Is this injector a direct fit for my Caterpillar 320D excavator?
Yes, the 557-7637 injector is a direct OEM replacement specifically designed for the Cat C9 engine used in the 320D series excavators. No modifications are required for installation.

Q2: What is the difference between a new and a remanufactured injector?
A remanufactured injector is a used core that has been completely disassembled, cleaned, inspected, and rebuilt with new components to meet OEM performance standards. It offers the same reliability as a new part but at a lower cost.

Q3: Do I need to replace all injectors at once?
While it is recommended to replace injectors in sets for balanced performance, this single unit is ideal for replacing a failed injector. We recommend professional diagnosis and installation to ensure proper engine timing and fuel pressure.