Caterpillar original 217-2570 Diesel Fuel Injector for C-9 Engine 330C Excavator 12H D6R Replacement for OEM 172-5780 188-8739 235-2888 new original new injector

The Caterpillar CAT C9 C-9 HEUI Diesel Fuel Injector 217-2570 is engineered as a direct OE-style replacement for the C9 / C-9 diesel platform, fitting the 330C, 12H, D6R II, 973C, TK711, TK721, TK722, TK732, MT735, MT745, MT755, and MT765 equipment range. Designed around the HEUI architecture, the injector uses a solenoid commanded by the ECM to control injection timing and duration, while high-pressure engine oil drives the intensifier piston that internally pressurizes and atomizes the fuel through a precision-machined nozzle.

Built with heavy-duty materials and calibrated nozzle geometry, this injector helps restore stable idle, balanced cylinder contribution, and clean combustion across construction, mining, agricultural, forestry, and truck engine applications. It supports multiple supply options including New Replacement, Remanufactured, Rebuilt, and Exchange units with a Core Return Program, giving fleet operators flexibility for planned maintenance and emergency replacement. Broad cross-reference coverage across 10R-7224, 236-0962, 235-2888, 188-8739, and related numbers simplifies part identification for global distributors and service workshops.

For reliable service life, use clean diesel fuel meeting regional standards, replace fuel filters on schedule, and maintain engine oil and oil filters because HEUI injectors depend on high-pressure oil for actuation. During troubleshooting, verify fuel pressure, oil pressure, injector actuation pressure, diagnostic codes, and harness condition. After installation, monitor idle quality, smoke level, load response, and fuel consumption to confirm restored engine performance and reduced downtime.