Caterpillar original  10R-1276 10R1276 375-4106 20R3483 250-1303 Common Rail Diesel Engine Fuel Injector for 3508B 3512 3512B 3516 3516B 3516C original new injector

The CAT 3512B Fuel Injector 10R-1276 is an OEM standard diesel fuel injector assembly engineered for the V12, four-stroke CAT 3512B engine platform with a displacement of 51.8 liters. Manufactured using CNC-controlled machining centers, the injector ensures dimensional consistency and high injection accuracy through precisely calibrated nozzle geometry, delivering optimized spray patterns for superior fuel atomization. Critical internal components are produced from hardened alloy steel, providing high temperature resistance, wear resistance, and corrosion protection for continuous operation in demanding industrial environments.

This heavy duty injector is designed for generator sets, marine propulsion systems, offshore platforms, mining trucks, oilfield equipment, and construction machinery, serving power generation, mining, marine, oil and gas, and heavy industrial sectors. Direct injection technology supports the complete working cycle of fuel supply, pressurization, injector activation, atomization, air-fuel mixing, combustion, and power production. Operators benefit from improved combustion efficiency, reduced fuel consumption, increased horsepower, reduced particulate emissions, better throttle response, and extended engine service life.

Proper installation includes cleaning the injector mounting bore, installing new sealing washers, verifying the injector seating surface, tightening to Caterpillar specifications, priming the fuel system, and performing post-installation leak and performance checks. Routine maintenance covers daily inspection of fuel leaks and exhaust smoke, weekly fuel filter and pressure checks, monthly injector balance testing, and scheduled overhaul including nozzle inspection, seal replacement, and fuel system calibration.