Caterpillar original Caterpillar 0R-8338 diesel fuel injector replacement for OEM 3408 engine common rail new injector original new injector

The CAT 0R-8338 fuel injector is engineered as a direct OEM replacement for Caterpillar 3500 Series diesel engines, including the 3508, 3512, 3512A, 3512B, and 3516 models. Manufactured with high-strength alloy construction and OEM-grade Viton sealing components, this injector delivers consistent high-pressure diesel injection across demanding operating environments such as power generation, marine propulsion, mining, oil and gas, and heavy industrial machinery.

Each unit is OEM calibrated and tested to ensure precise atomization, a stable flow rate, and an optimized spray pattern. These characteristics contribute directly to improved combustion efficiency, increased power output, reduced emissions, and extended injector service life. The injector cross-references with 111-3718, CA0R8338, CA1113718, and AM-0R8338, providing a reliable solution for both OEM and remanufactured engine applications. Thermal and mechanical stress resistance is built into the core design, allowing stable performance under continuous high-load operation.

Proper installation and scheduled maintenance are essential for maximizing injector longevity. Pre-installation steps include inspecting the cylinder head injector bore, verifying fuel rail pressure rating, replacing sealing washers and O-rings, cleaning fuel delivery lines, and ensuring a contamination-free environment. During installation, O-rings should be lubricated with clean diesel fuel, new sealing washers placed, and the injector torqued to Caterpillar specification before priming and idle testing. Recommended service intervals include flow testing every 1,000 hours, fuel filter replacement at 250 hours, leak testing at 500 hours, and calibration checks at 2,000 hours.