JCB 3CX / 4CX Backhoe Loader JCB448 Injectors

JCB 3CX / 4CX Backhoe Loader JCB448 Overview

The JCB 3CX / 4CX Backhoe Loader with the JCB448 4.8L EcoMAX CR engine was produced between 2013 and 2023. This vehicle uses Delphi common rail diesel injectors (primary part number 28580673) operating at fuel pressures up to 2000 bar. The JCB448 engine in the JCB 3CX / 4CX Backhoe Loader produces and of torque. When replacing injectors on the JCB 3CX / 4CX Backhoe Loader JCB448, always use new copper sealing washers and torque to manufacturer specifications. Each injector should be coded to the ECU after fitting.

Compatible Injectors

Common Injector Problems in JCB 3CX / 4CX Backhoe Loader

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  Rough idle and engine vibration — Worn injector nozzles cause uneven fuel spray, leading to rough idle at low RPM. Most noticeable when the engine is cold.
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  Excessive exhaust smoke — Black or blue-grey smoke on acceleration indicates poor fuel atomisation. This is often caused by carbon buildup on the injector nozzle tip.
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  Poor fuel economy — A worn or leaking injector delivers incorrect fuel quantities, reducing efficiency by 10–20% in severe cases.
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  Engine misfire under load — Intermittent misfires during acceleration suggest one or more injectors are failing to deliver the correct fuel pressure.
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  Difficult cold starting — Degraded injector nozzles struggle to atomise fuel at lower cranking pressures, causing extended crank times in cold weather.

Other JCB448 Vehicles

Related Pages

Delphi 4.8L EcoMAX CR — browse compatible engines, vehicles, and injectors