Caterpillar original Common Rail Fuel Injector 20R-1270 20R-0848 20R-1282 20R-1264 Replacement Diesel Parts for Caterpillar C3500 C3500B Engines 5130B 5230B Excavator original new injector

Designed as a genuine original equipment component for Caterpillar heavy-duty diesel power systems, the 20R-0848 fuel injector is purpose-built for CAT 3512B engine platforms across all variants. A factory-original CAT part, it carries primary OEM number 20R-0848 (alternate formatting 20R0848), and aligns with remanufactured number 10R-0955 (10R0955) and cross-reference numbers 10R-0953 (10R0953) and 10R-0957 (10R0957). It fits all 3512B configurations—including industrial, marine propulsion/auxiliary, generator set, power module, oilfield, and mining variants—as part of the CAT 3500 Series diesel lineup.

As a precision fuel metering device, the 20R-0848 injector receives low-pressure supply fuel and delivers precisely calibrated volumes into the combustion chamber at extreme high pressure. Its core functions include accurate fuel metering, atomization, injection timing control, and spray pattern optimization, which collectively boost combustion efficiency, cut exhaust emissions, and improve fuel economy. The part directly impacts engine power output, specific fuel consumption, smoke emissions, reliability, cold start performance, and long-term durability for demanding industrial operations.

This injector supports critical use cases across power generation, marine, mining, and oil & gas sectors, for equipment ranging from generator sets and marine vessels to drilling rigs and mining processing plants. For reliable operation, verify part number and engine serial compatibility pre-installation, follow Caterpillar torque specifications, and complete post-install pressure and combustion testing. Adhere to scheduled maintenance: 250-hour fuel filter inspections, 500-hour fuel system checks, and 1000-hour performance tests to maximize service life.