449-3315 Common Rail Injector for Excavators Cat 313D2, 318D2 and 320D2

449-3315 Common Rail Fuel Injector Overview

The 449-3315 is a new aftermarket common rail fuel injector for selected Cat C4.4 diesel engine applications. It is installed in the engine cylinder head and controls the timing and quantity of fuel delivered into the combustion chamber.

This injector is supplied as a replacement for Cat part number 449-3315 and the corresponding 20R-8742 reman reference. It is suitable for selected excavators, wheeled excavators, compactors, tractors, pavers and generator sets using the specified C4.4 engine arrangement.

Fitment Checks Before Installation

Before ordering, compare the original injector number and provide the complete engine model and serial number. The machine model alone may not be sufficient because different engine arrangements can use injectors with different calibration, connector or nozzle specifications.

The fuel rail, high-pressure pipes and fuel supply system should be inspected for contamination before installation. Common rail injector replacement should be carried out by a qualified technician using the correct installation and calibration procedures.

FAQ

Can the 449-3315 injector replace Cat Reman 20R-8742?

Yes. Cat lists 20R-8742 as the reman alternative to 449-3315. This product is supplied as a new aftermarket replacement rather than a genuine Cat Reman injector.

Which engines use the 449-3315 common rail injector?

The verified application is the Cat C4.4 engine family, including selected generator-set and machine engine arrangements. The complete engine serial number should be checked before purchase.

How can I confirm whether this injector fits my machine?

Provide the machine model, engine model, engine serial number, original injector number and clear photos of the injector connector and nozzle end. These details help confirm the correct configuration.

What is the warranty for the 449-3315 injector?

The standard warranty is 6 months. The fuel system should be clean and the injector should be professionally installed before operation.