Caterpillar original 254-4330 Diesel Engine C9 Rail Fuel Injector 235-5261 267-3361 293-4072 387-9436 10R7222 20R-8060 for CAT Excavator new original new injector

The CAT C9 HEUI diesel fuel injector OE 254-4330 is engineered as a direct replacement for Caterpillar C9 and C9 ACERT engines installed in CAT 330D, 336D, 336D L, and 340D excavators, as well as selected industrial and oilfield equipment such as pump skids, cementing units, coil tubing units, workover rigs, and hydraulic power units. Designed around the original HEUI hydraulic electronic unit injector platform, it delivers accurate fuel metering, stable atomization, correct injection timing, and reliable sealing to help restore engine power, reduce smoke, stabilize idle, and support fuel efficiency under heavy-duty operating conditions.

Each injector is produced under strict quality control and individually factory tested for flow rate, leakage, spray pattern, solenoid response, and sealing performance, ensuring consistent performance comparable to original equipment standards. The authorized cross references 254-4339, 254-4340, and CA2544330 provide additional compatibility options within the same C9 HEUI fuel system family, simplifying replacement sourcing for excavator repair shops, diesel engine rebuilders, fleet maintenance companies, parts distributors, mining contractors, and construction machinery owners.

For dependable service life, the injector should be paired with clean diesel fuel, regularly replaced fuel filters, drained water separators, correct engine oil grade and service intervals, and a clean air filter. Routine inspection of fuel lines, electrical connectors, return flow, and ECM diagnostics helps prevent contamination, corrosion, actuation faults, and repeated failure after installation, while clean dry storage protects unused stock.