Caterpillar original 557-7633, 20R-8064 Common Rail Fuel Injector for Caterpillar C9 Engine,  Cross Reference 387-9433, Replacement for OEM Parts, Excavator Construction original new injector

The Caterpillar 20R-8064 fuel injector is a precision-engineered, heavy-duty diesel fuel injection component designed for CAT C7, C7 ACERT and C7.1 engines equipped with HEUI (Hydraulically Actuated Electronically Controlled Unit Injector) technology. Instead of relying on camshaft-driven injection pressure, this injector uses high-pressure engine oil to intensify fuel pressure, delivering accurately metered fuel into the combustion chamber under extremely high pressure. The result is optimal atomization, complete combustion, maximum engine performance, lower fuel consumption, and reduced emissions across varying load conditions.
Built to Caterpillar injector dimensional standards, the 20R-8064 features wear-resistant internal components manufactured from hardened alloy steel with precision grinding technologies, ensuring long-term durability in demanding environments. Its corrosion-resistant design is compatible with ultra-low sulfur diesel and various global fuel standards, while high-temperature resistance guarantees stable operation under severe thermal conditions, including continuous-duty operation, high-altitude environments, and extreme temperatures. Under proper maintenance, the expected operational lifespan may exceed 10,000 hours. The HEUI actuation principle also provides precise injection timing, better cold-start performance, and higher power density compared with conventional mechanical injection systems.
This original CAT injector cross-references 10R-7222, 10R-7221, 20R-8968, 20R-1917, 229-1775, 235-3907, 254-4339, 267-3360, 293-4072, 328-2574, 387-9433, 557-7633, 553-2592, and 572-0119, and is widely used in CAT excavators, wheel loaders, motor graders, power generators, mining equipment, marine equipment, and industrial engines. Professional calibration and ECM verification are strongly recommended after installation.