Product Overview

This high-precision Common Rail Fuel Injector is a direct replacement for Cummins QSL9 8.9L engines, commonly used in Komatsu PC300-8 excavators and heavy-duty diesel trucks. As a critical component of the fuel delivery system, this injector ensures optimal atomization and combustion efficiency. We supply this injector globally, with major markets including North America, Europe, Southeast Asia, the Middle East, and Australia. Each unit is shipped from our Shandong, China facility via DHL, FedEx, UPS, or TNT for rapid delivery to industrial centers worldwide.

Key Features & Benefits

• Precision Engineering: Manufactured to OE specifications with a stainless steel body for corrosion resistance and long service life.
• Enhanced Performance: Delivers consistent fuel pressure and precise injection timing, reducing fuel consumption and emissions.
• Rigorous Testing: 100% professionally tested for flow rate, spray pattern, and sealing performance before dispatch.
• Easy Installation: Direct bolt-on replacement; includes nozzle type DLLA118P2203 for seamless fitment.
• Cost-Effective Solution: A reliable aftermarket alternative to expensive OEM parts, backed by a 6-month warranty.

Technical Specifications

OEM Cross-Reference

This injector is a direct replacement for the following OEM numbers and their cross-references:

• Cummins / OEM: 3965721, 3973060, 4939061, 4940170, 5263308
• Komatsu / Additional: 6745-11-3102, 6745-12-3100
• Aftermarket / Bosch: 0445120125, 0445120236, 0445120029
• Other: 84346812, 1077550420

Note: Always verify your engine’s specific requirements against the part numbers listed above.

Compatibility

• Engine: Cummins QSL9 (8.9L, 6-cylinder) – Used in off-highway and heavy-duty applications.
• Vehicle / Equipment: Komatsu PC300-8 Hydraulic Excavator (2007-onwards).
• Other Applications: Compatible with various diesel trucks and industrial equipment using the QSL9 engine platform. Please confirm fitment with your chassis or engine serial number.

Global Supply & Distribution

We offer efficient worldwide logistics to support B2B procurement needs:

• Shipping Partners: DHL, FedEx, UPS, TNT, EMS, and sea freight for bulk orders.
• Major Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands, France), Asia-Pacific (Japan, South Korea, Australia, Singapore), Middle East (UAE, Saudi Arabia, Qatar), Africa, and South America.
• Delivery Speed: Express shipping delivers to major ports (e.g., Rotterdam, Los Angeles, Shanghai) within 5-7 working days. Sea freight for container orders available.
• Export Expertise: Experienced in international trade documentation, customs clearance, and compliance with CE, ISO, and EPA standards.

Quality Assurance

• Manufacturing Standard: Produced in ISO 9001-certified facilities with precision CNC machining.
• Testing: Each injector undergoes 100% professional testing for fuel pressure, spray pattern, and leak resistance.
• Warranty: 6-month warranty against manufacturing defects. We provide technical support for installation and troubleshooting.
• Packaging: Securely packed in neutral boxes with foam cushioning to prevent damage during transit.

FAQ

Q1: Is this injector a direct fit for my Komatsu PC300-8 with a Cummins QSL9 engine?
A: Yes, this injector (0445120125 / 0445120236) is designed specifically for the QSL9 8.9L engine used in the Komatsu PC300-8 (2007 onward). However, we recommend cross-referencing your old injector’s part number with the list provided (e.g., 6745-11-3102) to ensure compatibility. The nozzle type is DLLA118P2203.

Q2: Do I need to replace the injector as a set or can I replace just one?
A: While a single injector can be replaced, we strongly advise replacing all six injectors simultaneously to ensure balanced fuel delivery and engine performance. Mismatched injectors can cause uneven running, increased emissions, or reduced power. If budget is a concern, at least replace injectors on the same bank.

Q3: What maintenance is required after installing this injector?
A: After installation, it is critical to prime the fuel system to remove air. Use a scan tool to calibrate the injector codes (if required by your ECU). We recommend using high-quality diesel fuel and replacing fuel filters regularly to protect the injector from contamination. Check the return fuel line for leaks after the first 50 hours of operation.