Caterpillar original  128-6601 Common Rail Diesel Fuel Injector for 3126B 3126E C7 Engine 120H 135H 953C 963C 322C Excavator Motor Grader Loader original new injector

The HEUI fuel injector 128-6601 is engineered for Caterpillar 3126, 3126B, 3126E, and C7 diesel engines using the Hydraulic Electronic Unit Injector system. It is commonly installed on CAT 322C, 325C, 325C L, M325C, 950G II, and 962G II excavators, loaders, trucks, and other industrial equipment. The unit operates within the HEUI architecture, where high-pressure engine oil drives the injection process and the electronic control module manages precise injection timing and metering.

This part is offered as a direct replacement, aftermarket, and remanufactured injector, giving fleet operators and repair shops flexible sourcing options. It supports both hyphenated and non-hyphenated search formats across multiple cross-reference numbers including 128-6601, 1286601, 178-0199, 1780199, 198-6605, 1986605, BN1830691C1, CA1286601, 259-3597, 2593597, 10R-0782, 10R0782, 10R-4761, 10R4761, 177-4754, 1774754, 178-6342, 1786342, 222-5966, and 2225966. The broad cross-reference coverage simplifies procurement, inventory management, and field identification for distributors and end users working with mixed part databases.

Built to OE specifications, the injector is designed to restore original spray pattern, injection pressure, and engine performance. It is suitable for heavy-duty applications where fuel delivery consistency directly affects power output, emissions, and fuel economy. Whether used in scheduled engine rebuilds, emergency field repairs, or routine injector replacement programs, the 128-6601 HEUI injector provides a reliable and cost-effective solution for maintaining Caterpillar 3126 series and C7 engine platforms in demanding industrial working environments.