Caterpillar original Diesel Fuel Injector 173-4059 0R-8786 Replacement for Caterpillar CAT 3126B 3126E 3412E 3412 Engine, Compatible with 10R-9237 for Tractor and Truck original new injector

Engineered as a direct-fit replacement for 3126 series diesel engines, this CAT-branded HEUI diesel fuel injector is designated with OE part number 173-4059 and falls under the 3126 product series. It is compatible with 3126, 3126B and 3126E 7.2L diesel engine variants, and is manufactured to match original equipment installation specifications for hassle-free replacement. As a professional industrial power system component, it targets the heavy-duty equipment aftermarket and supports standard fuel delivery functionality for matched engine setups.

This injector comes with an extensive list of cross-reference and universal part numbers, covering over 20 interchangeable identifiers including 1734059, 0R9349, EX639349, 1260499, 1317150 and more. The broad number compatibility accommodates varying part numbering systems used across original manufacturing, remanufacturing and aftermarket supply chains, eliminating lengthy part verification for B2B buyers. It allows fleet operators, maintenance workshops and parts distributors to source the correct component regardless of part number convention, streamlining procurement and inventory management workflows.

Suitable for a wide range of industrial use cases, this heavy-duty fuel injector supports equipment across truck, bus, marine, construction and power generation applications. Its versatile fitment makes it a high-demand SKU for businesses servicing multiple equipment categories, reducing the need to stock specialized injector variants for different device types. For B2B customers serving diverse industrial sectors, this replacement injector provides a specification-matched solution for routine maintenance and unplanned component replacement across mixed fleets.