Caterpillar original 10R-9002 235-5261 236-0957 225-0117 Common Rail Fuel Injector for C9 Engine 336 336D Excavator Diesel original new injector

The Caterpillar 10R-9002 fuel injector is an OEM-specification common rail diesel injector engineered for CAT C9 series engines, including the C9, C9 ACERT, and C9.3 variants. Built as a direct replacement for part numbers 10R9002, 326-1645, 326-1646, 326-1647, 326-1648, and 326-1649, this injector integrates seamlessly into the electronic unit injection fuel system managed by the engine ECM. Its inline 6-cylinder configuration with an 8.8-liter displacement, turbocharged air intake, and water-cooled architecture make it suitable for excavators, wheel loaders, bulldozers, motor graders, mining trucks, drilling rigs, generator sets, marine auxiliary engines, and heavy-duty industrial machinery across multiple sectors.

Manufactured using CNC machined components, a precision ground needle valve, a hardened steel control valve, and a wear resistant nozzle, the 10R-9002 injector delivers high injection accuracy, stable fuel delivery, reduced fuel consumption, improved horsepower, and lower exhaust emissions. The corrosion resistant surface treatment and heavy-duty design provide high temperature resistance, high pressure resistance, and long service life under continuous industrial operation. Every unit is ISO9001 certified, supplied brand new, and backed by a 12-month warranty to meet OEM performance standards.

Proper installation requires cleaning the injector bore, inspecting the fuel rail, replacing sealing washers, lubricating O-rings, installing the injector vertically, applying the specified torque, performing ECM calibration, and conducting a fuel leakage test. Preventive maintenance includes using ultra-clean diesel fuel, replacing filters on a regular schedule, monitoring fuel pressure, avoiding water contamination, and performing periodic injector testing to ensure extended engine life and consistent operation.