Caterpillar original 169-7408 C9.3 E336E Excavator Diesel Engine Fuel Injector 460-8213 20R-5075 456-3509 20R5075 4563509 original new injector

The Caterpillar 169-7408 fuel injector is engineered for the CAT C9.3 diesel engine, operating within a high-pressure common rail fuel system that delivers fuel pressurization of approximately 1,800–2,200 bar. Electronically controlled by the engine control module, this injector ensures precise fuel metering across all load conditions. The advanced nozzle geometry produces ultra-fine fuel droplets, improving combustion efficiency and reducing exhaust emissions. Built to Caterpillar OEM specifications, every unit undergoes 100% performance testing to guarantee consistent flow rates, responsive solenoid actuation, and reliable operation in demanding industrial environments including construction sites, mining operations, power generation facilities, marine vessels, agricultural fields, and oil and gas installations.

Designed for long service life, the 169-7408 injector features robust internal components engineered for continuous operation in harsh conditions such as quarries, underground mines, and high-temperature worksites. Its corrosion-resistant construction makes it suitable for humid environments and coastal regions where moisture and salt exposure are common. The injector supports common rail pressures exceeding 2000 bar, maintaining stable injection timing and spray patterns throughout extended duty cycles. Full cross reference compatibility is provided with part numbers including 138-8756, 155-1819, 171-9704, 173-9272, 173-9379, 222-5967, 232-1175, 232-1183, 324-5467, 364-8024, 392-9046, 456-3493, 456-3509, 456-3544, 456-3545, 456-3589, 20R-4148, 20R-5077, and 10R-1267.

Prior to installation, technicians should clean the injector bore, inspect all sealing surfaces, and replace the copper washer and O-rings with new components. Damaged seals must never be reused, and calibrated torque tools should be applied to prevent over-tightening. After mechanical installation, the fuel system must be properly bled to remove air pockets, and injector coding should be performed if the ECM requires calibration input. This injector is widely used across CAT 336, 336D, 336E, 336F, 340D, 340F, 349E, and 349F excavators, 950M, 962M, 966M, and 972M wheel loaders, 140M, 150M, and 160M motor graders, CS64B, CS74B, and CP74B compactors, as well as CAT DE series generator sets and C9.3 generator packages.