Caterpillar original Common Rail Fuel Injector 10R-7938 for C6.6 C4.4 E320D D6K D6N 326-4700 3264700 321-3600 2645A753 original new injector

The Original Caterpillar CAT C6.4 C6.6 Fuel Injector is engineered as a direct OEM replacement for demanding heavy equipment applications. Built with high strength alloy steel construction and corrosion resistant components, this common rail injector delivers precision fuel metering with operating pressures exceeding 2000 Bar. Each unit is factory flow tested and calibrated to original specifications, ensuring consistent atomization, stable rail pressure, and reliable cold start behavior across CAT C6.4, C6.6, C6.4 ACERT, and C6.6 ACERT diesel platforms.

Compatible with CAT 320D, 321D, 323D, 324D, 325D, and 329D excavators, along with 950H and 962H wheel loaders, generator sets, industrial power units, and mining machinery, the injector supports a broad range of construction, agricultural, power generation, and marine operations. The electronically controlled design maintains accurate injection timing and volume under heavy load cycles, contributing to reduced fuel consumption, lower emissions, and improved throttle response for long service life in industrial environments.

Installation requires professional procedures, including replacement of injector seals and washers, verification of fuel pressure, leak testing, and injector coding when applicable. Operators should use OEM-quality fuel filters, prevent water contamination, maintain clean fuel storage, and perform periodic injector balance testing to maximize component longevity. Authorized OE numbers 10R-7938, 321-3600, 320-3800, 2645A752, and 2645A753 ensure proper fitment within OEM and aftermarket supply chains.