Perkins original Perkins 10R-7939 Common Rail Fuel Injector for C6.4 C6.6 C4.4 1104D-E44TA Engine D6N Excavator Spare Parts new injector original new injector

The Original Perkins Fuel Injector 10R-7939 is a high-pressure common rail diesel injector engineered for Perkins C6.4, C6.6, C6.4 ACERT, C6.6 ACERT, Perkins 1106D-E66TA, and Perkins 1106D-E70TA industrial diesel engines. Designed to operate reliably at injection pressures exceeding 1800 bar with a maximum working pressure of 2000 bar, this injector delivers consistent atomization and precise fuel metering. It is manufactured from hardened alloy steel using micron-level machining tolerances combined with precision multi-hole nozzle technology, ensuring accurate spray patterns and stable performance across demanding load cycles. Protective surface treatments enhance corrosion resistance and extend service life in harsh operating environments such as mining, construction, marine, and industrial power applications.

This fuel injector provides direct OEM fitment for Perkins D6N, D6N XL, D6N LGP, 930H, 928HZ, 953D, and IT28G equipment, as well as industrial power units and generator sets, allowing installation without modification. The injector supports improved combustion efficiency, reduced fuel consumption, lower exhaust emissions, enhanced cold start performance, and improved engine responsiveness, contributing to extended overall engine service life. Each unit undergoes 100% performance testing for injection quantity, return flow, leakage, response time, spray pattern, and solenoid resistance, ensuring compliance with OEM specifications before shipment.

Compatible cross reference numbers include 10R-7939, 320-0688, 321-1080, 293-9580, 289-7500, 282-0480, 276-8280, 266-4434, 257-2500, 2645A742, 2645A753, 2645A747, 2645A708, 2645A704, 2645A703, and 2645A473, providing broad interchangeability for maintenance and replacement needs. During installation, a new copper washer should always be used, the injector bore condition should be inspected, and the fuel system should be bled afterward. Injector coding and calibration should be performed when required by the engine management system. For optimal longevity, operators are advised to use high-quality diesel fuel, replace fuel filters regularly, avoid water contamination, perform periodic injector balance testing, and monitor fuel return flow values.