Caterpillar original 10R-1259 common rail fuel injector for C10 C12 engine 345B 345C excavator replacement for OEM 350-7555 10R-0967 new original new injector

The Caterpillar fuel injector 10R-1259 is engineered for the C10 engine series and is fully compatible with C12 powerplants, delivering precise fuel metering within high-pressure common rail systems operating at 1500–1600 bar. Built with hardened alloy construction and protective coatings, the injector resists thermal stress, wear, and corrosion caused by aggressive diesel fuels. Multi-hole precision nozzles combined with electronically actuated control ensure repeatable atomization and fast response rates for accurate injection timing. A standard Caterpillar electrical interface and OEM interchangeability allow the unit to match factory specifications for both fit and function across construction machinery, mining equipment, industrial generator sets, marine auxiliary engines, and agricultural high-power tractors.

Routine maintenance safeguards long-term performance. Visual inspection of the injector body and connections is recommended every 250 hours, with approved diesel system cleaning performed every 500 hours. Injector flow testing should follow factory-recommended intervals, typically annual or every 1000 hours, and O-rings and seals must be replaced at every major service interval. Installation torque on hold-down bolts should be set to 40–45 Nm, and OEM bleed procedures must be followed after installation to prevent air ingress and ensure stable idle quality.

Comprehensive cross references including 10R-1259, 387-9435, 328-2579, 293-4070, 241-9596, 573-4235, 10R-0967, 0R-8773, 212-3467, 317-5278, and 350-7555 provide flexibility for distributors, fleet operators, and remanufacturers across North America, Europe, Asia Pacific, the Middle East & Africa, and Latin America. Premium environmental sealing prevents leakage and contamination, while high-grade diesel fuel and clean supply lines help reduce emissions, improve fuel economy, and extend injector service life in demanding heavy-duty operations.