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Fuel injector for Caterpillar

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Caterpillar Fuel Injectors for Heavy Equipment

Find Caterpillar fuel injectors at Fab Heavy Parts for engine maintenance and repair across a range of CAT machinery and engine applications. This collection includes fuel injectors, injector sets, and injector nozzle assemblies for selected Caterpillar engines used in excavators, loaders, tractors, trucks, and other equipment. Browse by part number and engine model to narrow your search to the component specified for your application.

Fuel Injectors for Different CAT Engine Models

The collection includes listings for a variety of engine families, including C3.3B, C3.4, 3044C, 3046, 3114, 3116, 3126, 3208, 3304, 3306, 3406B, and other Caterpillar engines. Verified examples include fuel injector 314-9985 for stated C3.4 and 3044C applications, injector 235-5901 for listed 3044C, C3.4, and 3046 applications, and injector 127-8216 for specified 3114, 3116, and 3126 applications. Each part has its own fitment details, so do not assume that injectors are interchangeable across engines. 

Individual Injectors, Sets, and Nozzle Assemblies

Depending on the listing, you may find individual fuel injectors, multi-piece injector sets, or pencil-nozzle assemblies. For example, the collection includes 1W5829 injector sets listed for certain 3208, 3204, and 3304 engine applications, as well as 4W-7018 pencil-nozzle assemblies for specified 3406B, 3432, and 3408/3408B applications. Check the product title and description to confirm the package quantity and component type. 

Choose the Correct Caterpillar Fuel Injector

Before ordering, compare the part number on your original injector with the product listing. Confirm the engine model and equipment application, and check whether the listing identifies the component as new, aftermarket, or remanufactured. Some injectors are explicitly marked remanufactured, so condition should be verified for each item rather than assumed across the collection.

Need Help Finding the Right Fuel injector for Caterpillar?

Can't find the replacement part you need? Send FAB Heavy Parts your part number, engine model, or equipment details. Our team can help review your requirements and provide a quotation.

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Frequently Asked Questions

How do I find the correct fuel injector for my Caterpillar engine?

We recommend checking the part number on your original injector first. Then compare the engine model, engine serial number, and equipment application with the Caterpillar replacement fuel injector listing. Caterpillar engines can use different injectors depending on their configuration, so the engine model alone may not be sufficient. If you're unsure, provide your original injector number and engine information before ordering.

Can I buy a single injector, or do I need a complete set?

Our Caterpillar replacement fuel injectors listings include individual injectors and multi-piece sets. Some products are sold as single units, while others are listed as sets of four, six, or more. Check the quantity stated in the product title and description before ordering. The number of injectors you need depends on the repair being performed and the condition of the existing components.

What should I check when my replacement fuel injector arrives?

Before installation, inspect the injector for visible shipping damage and compare its identification number and physical configuration with the original component. Confirm that the supplied quantity and any listed accessories match your order. Keep the injector's fuel connections protected from contamination and follow the applicable engine service instructions. If something does not match, resolve the discrepancy before installation.

What if my Caterpillar engine still runs poorly after replacing an injector?

Continued rough running, misfiring, or starting problems do not necessarily mean the replacement injector is defective. First, confirm that the correct injector was installed and that the applicable service procedures were followed. Other fuel system, electrical, or engine-related faults may produce similar symptoms. We recommend checking the engine's diagnostic information and service documentation before replacing additional parts.

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