The 0445120400 common rail injector is a high-precision fuel injection component widely used in high-pressure common rail diesel engine systems. Controlled by an ECU, this injector delivers precise fuel injection and atomization, improving engine combustion efficiency, power output, and fuel economy. Suitable for Caterpillar C4.4 and C7.1 diesel engines, it can be used for maintenance and replacement in construction machinery, generator sets, agricultural machinery, and industrial power equipment.
Product Features
- High-Precision Injection: An electronic control system enables high-speed, precise fuel injection, improving combustion efficiency and engine performance.
- Reduced Fuel Consumption and Emissions: Optimized fuel atomization ensures more complete combustion, effectively reducing fuel consumption and harmful emissions.
- Durable and Reliable: Constructed from a high-temperature alloy, it is wear-resistant and corrosion-resistant, ensuring high long-term stability.
- Easy Maintenance: A rational structure facilitates assembly and disassembly, reducing operating costs.
- Easy Installation: A rational design allows for easy assembly, disassembly, and maintenance, reducing equipment downtime.





Frequently Asked Questions
What products do you specialize in?
We specialize in excavator engine spare parts including cylinder blocks, cylinder heads, crankshafts, complete engine assemblies, pistons, liners, rings, camshafts, connecting rods, oil pumps, water pumps, valves, and all related engine components.
What if I only know the excavator model but not the part numbers?
You can send us photos of your existing parts, nameplate information, or dimensional specifications for reference and identification.
Do you accept sample orders?
Yes, we can supply samples of parts we have in stock. Customers are responsible for sample costs and shipping fees.
Do you test products before shipment?
All products undergo 100% quality testing before delivery to ensure performance and reliability.
What is your policy for defective items?
Our products are thoroughly tested, but if any issues arise, our professional after-sales team will promptly address and resolve them.