Perkins original  10R-7939 Diesel Common Rail Fuel Injector Replacement for 320-0680 10R-7674 10R-7672 10R-7671 Excavator Engine Part  original new injector

The Perkins C6.6 Fuel Injector 10R-7939 is engineered as a direct OEM replacement for Perkins C6.4, C6.6, and 1106D series diesel engines, serving models such as the D6N, D6N XL, D6N LGP, 930H, 928HZ, 953D, and IT28G. This common rail injector carries authorized OE number 10R-7939 and cross-references 320-0688, 321-1080, 293-9580, 289-7500, 282-0480, 276-8280, 266-4434, 257-2500, 2645A742, 2645A753, 2645A747, 2645A708, 2645A704, 2645A703, and 2645A473, ensuring broad compatibility across the Perkins C6 product family used in construction, mining, power generation, agriculture, and marine equipment.

Manufactured from hardened alloy steel with micron-level machining tolerances and precision multi-hole nozzle technology, this high pressure injector operates reliably at fuel pressures exceeding 1800 bar, with a working pressure rating up to 2000 bar. Protective surface treatments enhance corrosion resistance, extending service life in harsh operating environments. Every unit is 100% performance tested for injection quantity, return flow, leakage, response time, spray pattern, and solenoid resistance, delivering precise fuel metering, improved combustion efficiency, reduced fuel consumption, lower exhaust emissions, and enhanced cold start performance.

Installation requires a new copper washer, inspection of the injector bore, and proper fuel system bleeding following replacement. Recommended maintenance practices include the use of high-quality diesel fuel, regular fuel filter replacement, prevention of water contamination, periodic injector balance testing, and monitoring of fuel return flow values. Diagnostic procedures such as the Injector Return Flow Test, Common Rail Pressure Test, ECU Fault Code Analysis, Spray Pattern Analysis, and Solenoid Resistance Measurement should be performed to maintain optimal engine performance.