Perkins original Perkins 266-4446 Engine Fuel Injector Nozzle for C9 C7 C6.4 Excavator Construction Machinery Spare Parts new injector original new injector

The Perkins C9 Fuel Injector 266-4446 is an OEM-specification HEUI (Hydraulically actuated Electronic Unit Injector) designed for the Perkins C9 and C9 ACERT diesel engine platforms. Manufactured from hardened alloy steel with precision-ground valve assemblies and high-performance nozzle technology, this injector delivers optimized fuel atomization, combustion efficiency, and stable power output across demanding industrial workloads. Injection pressure capability exceeds 23,000 PSI (1,600 Bar), and electronic activation via the engine ECM ensures precise metering and emissions control throughout extended service intervals.

This injector is a direct-fit replacement for part numbers 236-0962, 235-2888, 217-2570, 188-8739, 10R-7224, 20R-8063, 387-9434, 328-2573, 293-4071, and 267-9734, covering a wide range of construction, mining, marine, power generation, forestry, and agricultural equipment. Compatible applications include excavators, track-type tractors, wheel loaders, motor graders, bulldozers, mining trucks, diesel generator sets, commercial vessels, and tracked agricultural machinery. Each unit is factory tested for calibration accuracy to maintain consistent injection performance under heavy-duty operating conditions.

During installation, clean the injector bore thoroughly, install new sealing washers, and lubricate O-rings with clean diesel fuel. After installation, perform injector leak-off testing, verify ECM calibration parameters, and inspect return flow rates. Operators should use ultra-clean diesel fuel, replace fuel filters regularly, avoid water contamination, and monitor fuel pressure to maximize service life and maintain reliable engine performance in industrial environments.