Caterpillar original Common Rail Fuel Injector for Caterpillar C6.6 C4.4 Engine 2645A747 10R-7672 Cross Reference 320-0680 Replacement for OEM Excavator 320D E320D Diesel Parts original new injector

The CAT 2645A747 C6 Series high-pressure common rail diesel injector is an industrial-grade fuel system component manufactured to strict OEM-level standards. This brand-new injector is engineered for reliable fit and performance across compatible Caterpillar and Perkins diesel engine platforms, and comes with a 12-month warranty for global commercial customers. It supports direct replacement of original units matching any of its fully validated cross-reference part numbers.

Controlled by the engine’s ECU, the injector activates via an electrical solenoid signal to release precisely metered fuel through its precision-machined nozzle. The optimized spray pattern enables fine fuel atomization and complete combustion, delivering improved fuel economy, stable power output, lower exhaust emissions, better cold-start performance, and reduced engine vibration. Its heavy-duty construction also provides high temperature resistance, stable idle operation, faster engine response, reduced smoke, extended service life, and lower long-term maintenance costs.

The injector is compatible with a wide range of Caterpillar heavy equipment including excavators, wheel loaders, backhoe loaders, and motor graders, serving sectors from construction and mining to agriculture, power generation, marine auxiliary power, and material handling. Operators can identify potential faults via indicators like difficult starting, engine hesitation, torque loss, abnormal smoke, and increased fuel consumption. To preserve service life, follow recommended maintenance practices: use premium diesel, prevent water contamination, replace fuel filters regularly, monitor fault codes, and inspect fuel pressure periodically.