Caterpillar original Caterpillar 116-8866 fuel injector 3116 3126 engine diesel fuel system replacement for OEM new injector original new injector

The Caterpillar CAT C12 diesel fuel injector 116-8866 is engineered as an OEM-style replacement injector for heavy-duty engine platforms, covering CAT C12, C10, 3176B, and 3196 engine families. Built with precision fuel metering components, stable spray pattern geometry, high-temperature resistant materials, and pressure-resistant internal construction, this unit injector delivers consistent atomization across demanding load conditions encountered in construction machinery, heavy trucks, mining equipment, marine propulsion, generator sets, and oilfield power units.

This injector assembly is designed to match factory dimensions, electrical connector specifications, and mounting interfaces, enabling straightforward installation without modification. Operators benefit from improved fuel economy, reduced exhaust smoke, stable idle quality, and dependable cold-start performance. Each injector is produced under controlled manufacturing tolerances and inspected for spray uniformity, opening pressure, and body integrity, helping reduce warranty return rates and ensuring reliable service in export distribution channels.

Compatible cross reference numbers include 0R-9596, 170-5236, 116-5425, 170-5252, 10R1258, 116-8805, 0R-8873, 10R-9235, 10R0961, 116-5426, 213-3465, 10R-1256, 10R-1003, 212-3463, 317-5278, and 281-7152, allowing distributors and fleet operators to consolidate part inventory across multiple Caterpillar engine applications. The combination of tested performance, industrial-grade packaging, and broad engine coverage makes this injector a practical replacement solution for international B2B aftermarket operations.