Caterpillar original Diesel Fuel Injector 386-1766 20R-1275 0R-3539 392-0214, OEM Replacement for Caterpillar 3508B, Fits Construction, Genset, Marine Machinery original new injector

Purpose-built for heavy-duty CAT diesel engine platforms, the genuine CAT 386-1766 original-new diesel fuel injector is a direct-fit OEM replacement for industrial equipment operators and maintenance teams. It carries the primary OE number 386-1766 (alternatively written as 3861766), with verified cross-reference numbers including 20R-1275 (remanufactured equivalent), 392-0214, 150-4456, 132-0204, 126-7995, 114-6469, 0R-8892 and 0R-8690. It is fully compatible with CAT 3508B, 3512, 3512B, 3516 and 3516B diesel engines to eliminate fitment errors.

Engineered for high-pressure common rail diesel systems, the 386-1766 injector supports operating pressures of 20+ MPa and adopts a multi-hole spray configuration. Made from premium steel alloys via high-tolerance machining, it delivers precise fuel metering, fine atomization and accurately timed fuel delivery to enable complete combustion. This design improves fuel efficiency, reduces exhaust emissions, and enhances overall engine reliability, with a recommended installation torque of 45–50 Nm per CAT guidelines.

Validated for harsh heavy-duty operating environments, the injector fits industrial generator sets, marine propulsion and auxiliary units, locomotive engine systems, construction power modules and integrated power packs. It serves sectors spanning mining, oil and gas, power generation, marine transport and construction, and supports extended service life when maintained per recommended schedules, helping operators cut unplanned downtime and support consistent equipment performance.