original 20R-5079 Common Rail Fuel Injector 456-3544 20R-5077 for C9 C9.3 Engine 336E 336E L 966K 972K Excavator Loader Diesel Injector original new injector

Engineered as a direct OEM replacement for the . C9.3 diesel platform, this common rail fuel injector (OE 20R-5079, cross references 456-3544, 10R-5504, CA4563544, CA20R5079, 712247AT, Injector GP-F, Fuel Injector Group) delivers the precise metering and high-pressure atomization demanded by modern turbocharged heavy-duty engines. It is compatible with C9.3, C9.3 ACERT, C9.3 Tier 4 Final, industrial, generator, construction and mining variants, providing a reliable fit-and-function solution for fleet operators and MRO buyers.

Built from CNC-machined hardened alloy steel and finished with advanced surface treatment, the injector withstands extreme rail pressures while maintaining a stable spray pattern over long service intervals. Optimized nozzle geometry improves combustion efficiency, reduces fuel consumption and lowers particulate emissions in line with Tier 4 requirements. Typical applications include . 336E and 336F excavators, D6T and D7E bulldozers, 627K and 637K wheel tractor scrapers, diesel generator sets, mining support equipment, pump and compressor units, marine auxiliary systems and heavy agricultural machinery.

Recommended installation includes cleaning the injector bore, replacing copper washers and O-rings, applying calibrated torque, performing injector coding and post-fit leakage inspection. Preventive care requires clean diesel, regular filter changes and periodic water separator draining. Supported diagnostics include return flow tests, bench testing, solenoid resistance checks, rail pressure verification, ECU scans and spray pattern inspection—ensuring dependable performance for B2B procurement partners worldwide.