original 131-7150 10R-9238 178-0199 116-3526 Diesel Injector for Excavator Parts new injector original new injector

Engineered specifically for the 3126, 3126B, and 3126E diesel platforms, the 131-7150 HEUI fuel injector delivers precise fuel metering through hydraulic electronic unit injection technology. The HEUI system uses high-pressure engine oil for injector actuation and electronic signals for injection timing, producing accurate fuel delivery, stable combustion, and consistent power output across demanding truck, bus, equipment, and industrial service environments. This part is a direct-fit original replacement covering multiple cross references within the 3126 injector family, supporting both OEM replacement and reman supply chains.

The injector is built for heavy-duty durability, with components matched to OE specification for long service life under continuous commercial operation. Its broad cross-reference coverage — including 0R9349, EX639349, 10R8999, 10R9238, 126-0499, 164-3355, 173-4059, 173-9267, 173-9268, 196-1401, 218-4109, and 222-5967 — simplifies inventory and part lookup for distributors, fleet workshops, and engine rebuild operations. Core exchange readiness makes it suitable for remanufacturing cycles and cost-effective fleet maintenance programs.

Proper maintenance requires clean fuel, correct engine oil pressure, regular filter and water separator service, injector harness inspection, and diagnostic monitoring. Because the 3126 HEUI injector depends on high-pressure engine oil for actuation, technicians should verify oil quality, high-pressure oil control, fuel supply pressure, ECM signal, and compression before injector replacement to prevent repeat failures and ensure reliable engine performance.