Caterpillar original Fuel Injector 961-4357 for 3512A Diesel Engine Parts, Replacement for 9Y-0052, 10R3053, 4P-9077, compatible with Construction Machinery original new injector

As a precision-built heavy-duty diesel component engineered for Caterpillar 3500 Series engine platforms, the CAT 961-4357 fuel injector assembly meets stringent operational demands across industrial, marine, mining, oil & gas and power generation sectors. It is compatible with 3508, 3508B, 3512, 3512A, 3512B, 3516, 3516B and 3516C engine models, and fits equipment covering generator sets, marine propulsion systems, mining trucks, construction machinery, offshore energy platforms and rail power systems for global high-load applications.

Operating under ECM-controlled injection timing and high-pressure fuel delivery logic, the injector atomizes diesel through precision nozzle holes to form a uniform air-fuel mixture, which enhances combustion efficiency, improves fuel economy, lowers exhaust emissions, boosts power output and extends engine service life under continuous heavy-duty operation. Its heat-treated alloy steel construction delivers high-temperature and corrosion resistance for long-term reliability.

Each unit is factory calibrated and 100% performance tested to OEM specifications, with both brand new and remanufactured options available, plus flexible neutral or OEM-customized export packaging. Designed for direct replacement, it comes with a 12-month warranty; users are recommended to follow official Caterpillar service guidelines, replace filters regularly and monitor injector balance rates to sustain optimal performance.