Caterpillar original C10 C12 Engine Common Rail Fuel Injector 212-3463 147-0373 153-7923 203-7685 212-3462 212-3467 212-3468 317-5278 for original new injector

The CAT 212-3463 Electronic Unit Injector is engineered for Caterpillar C10, C12, 3176, 3176C, and 3196 diesel engines, delivering precise fuel metering through advanced EUI technology. Each injector is CNC machined to extremely tight tolerances from hardened steel and heat-treated alloys, then finished with corrosion-resistant coatings to withstand severe industrial environments. With injection pressures exceeding 20,000 PSI / 1,400+ bar, the unit ensures fine fuel atomization, uniform combustion, and stable performance under continuous heavy-duty operation. The 212-3463 is a direct replacement for cross references 10R-0963, 10R-9235, 194-5083, 203-7685, 137-2500, 147-0373, 160-1090, 160-2303, 0R-8773, and 10R-1268.

This injector is widely deployed across construction, mining, power generation, oil and gas, and marine sectors, fitting excavators, wheel loaders, bulldozers, graders, mining trucks, quarry machinery, diesel generator sets, drilling rigs, pumping units, and marine auxiliary engines. Its thermal stability allows reliable operation in desert, arctic, and high-humidity conditions, while the robust internal structure handles high vibration and demanding mining duty cycles. Operators benefit from optimized combustion efficiency, improved throttle response, higher power output, reduced fuel consumption, and lower particulate and smoke emissions.

For maintenance, use clean diesel fuel, replace filters regularly, prevent water contamination, and monitor injector balance rates. During installation, disconnect the battery, remove the valve cover and hold-down bolts, extract the old injector, clean the bore, install a new sealing washer, torque the new injector to specification, reconnect the harness, prime the fuel system, and verify engine operation. Common fault symptoms include hard starting from carbon deposits or nozzle plugging, black smoke from worn nozzles, and white smoke from poor atomization or injector leakage.