Caterpillar original Caterpillar 10R-4844 fuel injector replacement for OEM diesel engine common rail new injector original new injector

The Caterpillar 10R-4844 fuel injector is engineered for the CAT C9 and CAT C9 ACERT diesel engine platforms, delivering OEM-equivalent performance across excavator, wheel loader, generator set, and marine propulsion applications. Built to original Caterpillar specifications, this electronic unit injector utilizes solenoid valve activation and precision-machined nozzle holes to achieve accurate fuel metering and fine atomization under high-pressure operating conditions, supporting maximum combustion efficiency and reduced particulate emissions.

Compatible with CAT 330D, 336D, 345D, 349D excavators, 966H, 972H, and 980H wheel loaders, as well as industrial, generator, and marine C9 power units, the 10R-4844 cross-references with 249-0713 and 328-2585, providing a reliable direct-fit replacement solution. The injector assembly is designed to optimize fuel economy, increase horsepower output, improve throttle response, and maintain stable idle performance, addressing common operator concerns such as hard starting, black smoke, rising fuel consumption, power loss, unstable idle, and engine misfire.

Manufactured under industrial-grade quality standards and individually inspected for performance consistency, the 10R-4844 injector assembly offers long-term engine durability, lower maintenance costs, and reduced equipment downtime for heavy-duty construction, mining, and power generation operations. Installation follows standard OEM procedures including cleaning the mounting area, replacing seals, applying correct torque specifications, and verifying injection performance after start-up. Regular use of clean diesel fuel, scheduled filter replacement, and periodic injector balance checks are recommended to maintain optimal fuel system performance throughout the service life of the engine.