Caterpillar original for C9 330D 340D excavator, replaces 20R-9433 235-9649 553-2592 328-2577 20R-8064, high pressure mechanical diesel fuel injector assembly original new injector

The Caterpillar CAT C9 ACERT fuel injector assembly, OEM referenced as 20R-9433 / 20R9433, is engineered as a direct replacement for Caterpillar C9 and C9 ACERT diesel engines used across heavy equipment, mining machinery, and industrial power applications. This MEUI / EUI electronically controlled unit injector delivers precision fuel metering and stable atomization to support consistent combustion across the 8.8-liter, six-cylinder platform rated 205–280 bkW / 275–375 bhp at 1800–2200 rpm, including CAT 330D L/LN configurations delivering 268 hp / 200 kW net flywheel power.

Built with heavy-duty internal components and validated through flow testing with trim code support, the injector is designed to withstand the high-pressure demands and severe-duty cycles typical of excavators, generator sets, pump drives, and off-highway machinery. Flexible new or reman supply options, optional seal kits, and export-safe packaging make this part suitable for distributors, fleet operators, and service shops sourcing reliable replacement injectors for CAT 330D, 336D, and 340D excavators as well as broader C9-powered equipment.

Buyers searching by alternative reference numbers can confidently cross-reference this injector against 387-9433, 10R-7222, 557-7633, 20R-8064, 20R-8968, 328-2574, 293-4072, 267-3360, and 254-4339, simplifying inventory management for workshops and resellers. Whether the application is construction, mining, oilfield service, or industrial power generation, this C9 series injector provides a dependable replacement solution that matches the original Caterpillar fuel system performance expectations.