Cummins 6BT5.9 Diesel Engine Injector 4991280 | OEM Fuel Injection Nozzle for Machinery

Product Details

Product Overview

This is a premium aftermarket diesel fuel injector, specifically designed for the Cummins 6BT5.9 engine family. The part number 4991280 ensures a direct replacement for the original OEM component. We supply this critical engine part globally to markets including North America, Europe, Southeast Asia, the Middle East, and Africa, supporting heavy machinery, agricultural equipment, and industrial generators.

Key Features & Benefits

• Precision Fuel Delivery: Engineered for optimal spray pattern and atomization, ensuring complete combustion for maximum power and fuel efficiency.
• Durable Construction: Manufactured from high-grade steel and hardened alloys to withstand extreme pressure and temperature within the combustion chamber.
• Direct Fitment: 100% interchangeable with the OEM part. No modifications required for installation on standard 6BT5.9 fuel systems.
• Rigorous Testing: Each injector is flow-tested and pressure-calibrated to meet or exceed OEM performance specifications.
• Extended Engine Life: Reduces carbon buildup and wear on pistons and valves by maintaining a clean, efficient burn.

Technical Specifications

OEM Cross-Reference

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

• Cummins OEM: 4991280, 3929087
• Interchange Numbers: 6BT5.9-120, 3800361
• Bosch Reference: 0433172097 (Common rail variants may differ; please verify mechanical pump type)

Compatibility

This injector is specifically designed for the Cummins 6BT5.9 (B Series) mechanical diesel engine. Common applications include:

• Heavy Machinery: Excavators, Bulldozers, Wheel Loaders (e.g., Komatsu PC200-6, Case 580)
• Agricultural: Tractors and Harvesters (e.g., Case IH, New Holland)
• Industrial: Generator sets and air compressors
• Marine: Auxiliary power units

Note: Verify your engine injector pump type (mechanical vs. electronic) before purchase. This part is for mechanical fuel systems.

Global Supply & Distribution

We specialize in cross-border B2B logistics for diesel engine components. Our supply chain ensures:

• Worldwide Shipping: Reliable delivery via DHL, FedEx, UPS, and Sea Freight to major ports (Shanghai, Rotterdam, Los Angeles, Dubai).
• Major Markets: Strong presence in North America (USA, Canada), Europe (Germany, UK, Netherlands), Asia-Pacific (Australia, Japan), and the Middle East (UAE, Saudi Arabia).
• Fast Turnaround: Orders processed within 24 hours, with stock levels maintained for high-demand parts.
• Trade Compliance: We provide full export documentation including commercial invoices, packing lists, and certificates of origin.

Quality Assurance

• Manufacturing Standard: Produced in ISO 9001:2015 certified facilities.
• Testing: 100% flow bench tested and pressure calibrated before packaging.
• Warranty: 12-month warranty against manufacturing defects under normal operating conditions.
• Material Quality: Use of high-carbon steel and nitriding surface treatment for wear resistance.

FAQ

Q: Is this injector a direct replacement for the Cummins 6BT5.9 engine in my excavator?
A: Yes, part number 4991280 is the standard mechanical injector for the 6BT5.9. It is a direct bolt-on replacement. Please ensure your engine uses a mechanical injection pump (not the later common-rail system).

Q: What is the recommended installation procedure?
A: Clean the injector bore thoroughly. Lubricate the O-ring with clean engine oil. Torque the injector clamp to 30-35 Nm. It is critical to use a new copper washer (not included) at the nozzle tip to ensure a proper seal against combustion gases.

Q: How can I verify the correct fuel pressure for this injector?
A: This injector is designed for standard 6BT5.9 pump pressures (typically 240-260 bar). If your engine has a modified pump, we recommend having the injector pop-tested by a diesel specialist to match the opening pressure to your specific engine requirements.