Caterpillar original Caterpillar 4P-9077 Common Rail Diesel Fuel Injector for 3516 3512 3508 Engine, Replacement for OEM new injector original new injector

The Caterpillar 3512A fuel injector, OEM part number 4P-9077 / 4P9077, is engineered as a direct replacement component for the 3500 Series V12 turbocharged diesel engine platform. Designed for direct fuel injection technology, this injector delivers high-pressure fuel atomization up to 2500 bar, ensuring precise metering and efficient combustion across demanding heavy-duty operating cycles.

Manufactured with high durability steel alloy construction and treated with heat-resistant and anti-corrosion coatings, the 4P-9077 injector withstands the thermal and mechanical stresses common in continuous-duty industrial environments. Its multi-hole spray tip nozzle produces a uniform spray pattern that promotes complete fuel burn, reducing carbon deposits, lowering exhaust emissions, and supporting stable engine performance under variable load conditions. The precision nozzle design further enhances injection timing accuracy, contributing to optimized fuel economy and reduced operational costs.

The 4P9077 injector is widely deployed in industrial generator sets, marine propulsion systems, mining haul trucks, drilling rigs, oil and gas compressors, and heavy construction equipment such as excavators, bulldozers, and loaders. Cross-referenced with part numbers 0R-2925, OR-2925, 236-8241, and 10R-7227, it serves as a reliable solution for fleet maintenance and engine overhaul programs. Routine inspection of injector seals, spray pattern verification through bench testing, and timely replacement of fuel filters are recommended to maximize service life and maintain consistent diesel engine performance in mission-critical applications.