Caterpillar original Common Rail Fuel Injector for C9.3 336E 336F Excavator Replacement OEM 20R-5075 456-3509 456-3493 456-3544 456-3545 20R-5079 20R-5078 original original new injector

The Original Caterpillar 20R-5075 fuel injector is engineered for the C9.3 diesel engine and manufactured to OEM specifications with precision machining and heat treated alloy steel construction. Its electronically controlled, fuel cooled common rail design operates at pressures up to 1800–2200 Bar, enabling precise management of pilot, main, and post injection timing and duration. A finely atomized spray pattern supports efficient combustion, reduced fuel consumption, and lower emissions across Tier 3 and Tier 4 compatible configurations.

This injector cross references 20R5075, 456-3509, 456-3493, 171-9704, 196-1401, 222-5966, 324-5467, and 364-8024, allowing direct replacement across a wide range of CAT machines. It is suitable for CAT 320, 320 GC, 323, 323 GC, 325, 326, and 330 excavators, 950, 950GC, 962, and 966 wheel loaders, 140, 150, and 160 motor graders, generator sets, pump units, compressor packages, power modules, mining equipment, and marine auxiliary systems, delivering dependable fuel delivery that matches Caterpillar performance requirements.

Built for harsh operating environments, the 20R-5075 offers corrosion resistance against water contamination, sulfur exposure, and fuel degradation. Its robust construction ensures long service life in construction, mining, quarry, power generation, and marine applications. Available in new, OEM, and reman options, this injector provides a reliable service replacement or overhaul solution for fleet operators and rebuild specialists seeking original equipment quality.