original 456-3544 Fuel Injector 456-3493 363-0493 for C9.3 336E L 966K Loader Machinery Replacement original new injector

Engineered specifically for the C9.3 platform, this fuel injector assembly delivers precise fuel atomization and consistent high-pressure performance across demanding operating cycles. The injector is purpose-built for the C9.3, C9.3 ACERT, C9.3 Industrial, C9.3 Generator Engine, and C9.3 Marine Engine variants, ensuring exact calibration compatibility with the engine control unit. Precision nozzle technology, heat-treated internal components, and a corrosion-resistant surface treatment enable reliable operation under high thermal and pressure loads characteristic of common rail diesel systems. OEM manufacturing standards guarantee dimensional accuracy and flow consistency for long service intervals in heavy-duty applications.

Fitment is confirmed for 336E, 336EL, and 336ELN excavators, 966K and 972K wheel loaders, D6T bulldozers, generator sets, industrial power units, and mining equipment. Authorized cross reference numbers include 456-3544, 4563544, 20R-5079, 20R5079, CAT4563544, and CAT20R5079, allowing straightforward replacement without additional modification. Every unit undergoes electronic calibration verification prior to shipment and is backed by a 12-month warranty. Packaging options include neutral or customized configurations to meet distributor and fleet procurement requirements.

To preserve injector integrity and ensure optimal engine performance, clean diesel fuel is recommended, along with regular fuel filter replacement and prevention of water contamination. During installation, technicians should disconnect the battery, remove the injector harness, clean the injector bore, install a new sealing washer, torque to OEM specification, reconnect fuel lines, and perform ECU diagnostic calibration. Injector coding and ECU calibration are strongly advised after installation to restore factory fuel mapping and emission performance across construction, mining, power generation, and marine auxiliary power applications.