Caterpillar original  370-7287 C4.4 Common Rail Diesel Fuel Injector 295050-0420 20R-2480 for 312E 420F Excavator  original new injector

The Caterpillar C4.4 Fuel Injector 370-7287 is engineered as a direct OEM replacement for CAT C4.4 diesel engines deployed across excavators, generator sets, loaders, skid steers, and various heavy-duty industrial and agricultural equipment. Built to OEM-grade specifications and manufactured with precision-machined components, this injector delivers consistent fuel metering, accurate spray patterns, and dependable cold-start performance under demanding operating conditions.

Featuring a high-pressure common rail design rated up to 2000 bar, the 370-7287 utilizes a multi-hole nozzle that optimizes fuel atomization for improved combustion efficiency, reduced fuel consumption, and lower exhaust emissions. Precision timing control enhances throttle response, while wear-resistant and corrosion-resistant materials ensure extended service life under extreme load, high temperature, and high vibration environments. The injector is broadly compatible across the CAT C4.4 engine family and cross-references with part numbers 287-4973, 287-4972, 10R-7220, 326-4754, 326-4765, 326-4770, and 326-4771, making it a versatile solution for fleet maintenance and component standardization.

Installation requires depressurizing the fuel system prior to fitting, cleaning the nozzle seat, applying thread lubrication, and tightening to a torque specification of 30–35 Nm using an M14x1.5 thread interface, followed by system testing. Routine maintenance includes periodic inspection for leaks and nozzle wear, cleaning with approved industrial solvents, use of authorized replacement parts, and adherence to OEM service intervals to maximize injector longevity and maintain engine performance.