Caterpillar original Caterpillar original Common Rail Fuel Injector 128-8510 317-5278 116-5414 116-8899 147-0373 194-5083 166-0149 10R-0963 0R-9530 170-5240 for C12 C10 345B 345C original new injector

The Caterpillar CAT C12 Fuel Injector 128-8510 is an OEM-specification electronic unit injector engineered for accurate, high-pressure fuel delivery across the full Caterpillar C12 engine platform. As a direct-fit replacement for OE part 128-8510, with cross references 10R0957, 20R2057, and 0R9349, this injector restores factory fuel metering precision on industrial, marine, generator, and heavy-duty on-highway C12 configurations used in excavators, loaders, haul trucks, mining equipment, vocational vehicles, and offshore or commercial marine vessels.

Manufactured to Caterpillar OEM tolerances and validated through 100% pre-shipment quality testing, the 128-8510 unit injector delivers measurable performance benefits including improved fuel economy, increased engine power, stable idle performance, and reduced exhaust smoke. Its precision-machined internal components promote longer engine life, lower total operating costs, and reduced maintenance downtime, supporting reliable duty cycles in construction, mining, transportation, marine, and power generation applications worldwide.

For optimal service life, install the 128-8510 using clean injector bores, new sealing components, and OEM torque procedures per the CAT service manual, then prime the fuel system, perform ECM calibration if required, and conduct a leakage and performance test. Operators are advised to use high-quality diesel, replace fuel filters regularly, avoid water contamination, monitor engine fault codes, and run periodic injector balance testing to sustain consistent fuel system performance.