Caterpillar original 20R-1264 Electronic Fuel Injector Common Rail Injector for Generator Set SR4B SR4BHV 3508 3512 3508B Replacement for OEM 392-0200, Cross Reference 386-1752 original new injector

Engineered for the demanding fuel systems of Caterpillar 3500 Series diesel engines, the CAT 20R-1264 electronic fuel injector delivers precisely metered, finely atomized diesel into the combustion chamber at exact ECM-commanded timing. Working with the high-pressure fuel pump and Engine Control Module, it regulates fuel volume per cycle, breaks fuel into fine droplets through a precision-engineered nozzle, and controls injection timing—directly influencing power output, fuel consumption, emissions, and cold-start performance.

Designed for the Caterpillar 3512B and related 3500 Series platforms—including the 3508B, 3516B, 3512B HD, and 3512B Marine—this injector is backed by an extensive cross-reference database: 392-0200, 386-1752, 10R-1284, 0R-9944, 229-0197, 250-1300, 162-8813, 144-5665, 246-1854, 392-0205, 386-1757, 10R-7237, and 244-7748. This enables buyers and service technicians to source exact or equivalent configurations across multiple industrial supply chains. Typical installations span marine vessels, generator sets, mining machinery, construction equipment, industrial power plants, oil & gas facilities, emergency backup systems, and agricultural installations.

Built to industrial-grade standards, the 20R-1264 combines OEM calibration compliance, high-pressure spray technology, and wear-resistant, corrosion-resistant materials with performance-tested quality for continuous heavy-duty operation. Meeting or exceeding Caterpillar OEM specifications, it supports both new and remanufactured configurations. For operators and maintenance teams, the result is efficient combustion, reduced particulate emissions, improved thermal efficiency, and smoother engine operation across marine propulsion, power generation, mining, and standby power applications.