original 320-0677 C4.4 C6.6 Diesel Fuel Injector Assembly for 320D 323D Excavator Engine Parts 10R-7671 2645A746 320-0680 new injector original new injector

Engineered specifically for the C4.4, C6.4, and C6.6 engine families, the 320-0677 fuel injector delivers precise fuel metering and optimized atomization required by these high-pressure common rail power units. The multi-hole nozzle design ensures a consistent spray pattern, promoting complete combustion, improved fuel efficiency, and reduced exhaust emissions across demanding industrial duty cycles. Manufactured from heat-treated alloy steel with an advanced anti-corrosion surface treatment, this injector is built to withstand continuous operation in construction machinery, generator sets, and heavy-duty industrial power applications.

The 320-0677 is fully compatible with 320D, 320D GC, and 323D L excavators, 914G and 914G2 wheel loaders, 420E backhoe loaders, D3K, D4K, and D5K track type tractors, as well as CP44 and CS44 vibratory compactors. It also integrates seamlessly into standby and prime power generator sets, irrigation power units, and auxiliary marine diesel engines. The cross-reference coverage, including 10R-7671, 292-3778, 306-9377, 2645A737, 2645A738, 2645A746, PK2645A737, PK2645A738, and PK2645A746, provides installers and fleet operators with broad interchangeability across the C6 engine platform.

Routine maintenance using OEM-specified fuel filters and clean diesel fuel is essential to preserve injector performance. Technicians are advised to monitor fuel rail pressure, conduct periodic return flow testing, and inspect the injector for signs of solenoid failure, internal wear, or leakage. These diagnostic steps help prevent hard starting, black smoke, power loss, excessive fuel consumption, and engine misfire, ensuring the 320-0677 injector continues to deliver reliable service throughout its extended operating life in mining, construction, agricultural, and power generation environments worldwide.