Caterpillar original Caterpillar 254-4340 Fuel Injector for C9 Engine E330D E336D Excavator Replacement for OEM new injector original new injector

The Caterpillar C9 diesel fuel injector 254-4340 is engineered as a direct replacement component for CAT excavator models 330D, 336D, 336DL, and 336DLN equipped with the C9 inline 6-cylinder diesel engine. Designed for the C9 turbocharged, aftercooled, direct-injection platform, this injector assembly delivers controlled injection quantity and consistent spray pattern to support efficient combustion across all cylinders. Industrial ratings for the C9 platform typically range from approximately 205–280 bkW at 1800–2200 rpm depending on configuration and emissions arrangement, and the injector 254-4340 is built to support stable engine power recovery and reliable performance in demanding field conditions.

Manufactured with durable metal construction and precision-machined internal components, the 254-4340 fuel injector provides stable atomization and accurate fuel delivery required for the CAT C9 fuel system. Every unit is tested before shipment for flow rate, leakage, atomization quality, and electrical or actuation response, ensuring dependable service for repair shops, engine rebuilders, fleet service companies, and heavy equipment parts distributors. The injector assembly is suitable for both individual replacement and full-set replacement when multiple worn injectors are identified during engine overhaul.

Compatible with multiple cross references including 254-4339, 387-9433, 387-9434, 10R-7222, 266-4446, 328-2574, 328-2576, 293-4072, 235-2888, 268-1839, 188-8739, 172-5780, and 236-0962, this C9 injector is widely used in construction machinery repair, mining equipment maintenance, quarry operations, and infrastructure projects. Proper maintenance practices — including the use of clean diesel fuel, scheduled fuel filter replacement, regular water separator draining, and clean fuel tanks — help extend injector service life and maintain balanced combustion across the entire C9 engine platform.