Caterpillar original Diesel Fuel Injector Nozzle: 7W7031, for heavy duty diesel engine application, 7W-7026, 7W7032, 7w7038, Diesel Spare Parts for CAT Engines original new injector

Fuel delivery at the nozzle tip directly influences combustion quality, and the CAT 7W7031 injector nozzle is engineered for this critical stage of Caterpillar diesel fuel injection. High-pressure fuel lifts the needle valve, while precision nozzle holes atomize diesel before it enters the combustion chamber. This process supports efficient mixing with compressed air, stable operation, improved combustion efficiency and power output. Manufactured to OEM specifications, the nozzle delivers accurate atomization and stable high-pressure performance.

Produced from high-speed tool steel, the 7W7031 features a corrosion-resistant construction, precision nozzle-hole technology and an OEM-equivalent quality level. Its design supports reduced fuel consumption, lower exhaust emissions and extended injector service life when the fuel system is maintained. The nozzle is listed for Caterpillar 3304, 3306, 3406, 3408 and 3412 platforms, as well as industrial, generator and marine diesel engines. Equipment applications include excavators, wheel loaders, bulldozers, mining trucks, motor graders, generator sets and industrial power units.

For maintenance and parts programs, the component is supplied new with neutral, OEM or customized packaging and a 12-month warranty. Final compatibility should be confirmed using the injector assembly number and engine serial number. During installation, clean the injector bore, replace sealing washers, follow OEM torque requirements, bleed the fuel system and inspect spray performance. Clean diesel, regular filter replacement and correct fuel pressure help limit contamination, wear and atomization-related faults.