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

The Perkins 320-0677 fuel injector is a high pressure common rail injector engineered for the Perkins C4.4, C6.4, and C6.6 turbocharged diesel engines. Designed to meet original Perkins fuel system specifications, it delivers precise fuel metering across all load and speed conditions, ensuring optimized combustion efficiency, reduced emissions, and consistent engine performance. With a multi-hole nozzle geometry, the unit produces an optimized spray pattern that supports superior atomization for cleaner and more complete fuel burn.

Manufactured from heat-treated alloy steel and treated with advanced anti-corrosion surface protection, the 320-0677 is built for heavy duty durability in demanding environments such as construction sites, mining operations, agricultural fields, and continuous power generation duty cycles. The injector is rated for common rail pressures exceeding 1,600–2,000 bar, making it suitable as a direct replacement for part numbers 10R-7671, 292-3778, 306-9377, 2645A737, 2645A738, and 2645A746 across a wide range of Perkins powered equipment.

The 320-0677 is widely applied in Perkins 320D, 320D GC, and 323D L excavators, 914G and 914G2 wheel loaders, the 420E backhoe loader, D3K, D4K, and D5K track type tractors, CP44 and CS44 vibratory compactors, generator sets, and industrial power units. To maximize service life, operators should use OEM fuel filters, maintain clean diesel supply, avoid water contamination, monitor fuel rail pressure, and perform periodic injector return flow testing. The Perkins 320-0677 provides a reliable OEM grade solution for global aftermarket and original equipment diesel fuel injection requirements.