original 254-4340 Diesel Fuel Injector for C9 Engine E330D E336D Excavator Replacement for OEM 387-9434 10R-7222 254-4339 328-2580 266-4446 Fuel Pump Injector original new injector

Engineered for heavy-duty operation in industrial diesel engines, the C9 fuel injector 254-4340 is a precision fuel delivery component built for excavator, construction, and mining applications. Cross-referenced under CA2544340, 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 injector assembly is designed to restore stable atomization, controlled injection quantity, and consistent spray pattern in the C9 / C9 ACERT platform.

The C9 engine is an inline 6-cylinder, 4-stroke, turbocharged, aftercooled, direct-injection diesel unit with approximate 8.8 L displacement, 112 mm bore, and 149 mm stroke, rated around 205–280 bkW at 1800–2200 rpm depending on configuration. Injector 254-4340 is commonly listed for 330D, 336D, 336DL, and 336DLN excavators. Constructed with durable metal components, it supports engine power recovery, cold-start performance, and long service intervals under high-load duty cycles typical of construction and mining environments. Each unit is tested for flow rate, leakage, atomization quality, and actuation response prior to shipment.

Common injector failure symptoms include hard starting, rough idle, black or white smoke, misfire, low power, high fuel consumption, and stored ECM fault codes. To maximize service life, use clean diesel fuel, replace fuel filters on schedule, drain the water separator, and verify correct fitment by engine serial number, machine model, and previous injector part number.