Perkins original Perkins 20R-8968 Diesel Fuel Injector Assy for C9 C7 Excavator E330D E336D E325D E329D Replacement for OEM new injector original new injector

The Perkins C9 Fuel Injector 20R-8968 / 20R8968 is an original remanufactured electronic unit injector designed to deliver factory-level fuel delivery for Perkins C9 diesel engines used in heavy equipment and industrial machinery. Built to OE engineering standards and updated with the latest production improvements, it provides consistent injection timing, balanced cylinder-to-cylinder fueling, and dependable cold-start performance across demanding working cycles in excavators, motor graders, wheel dozens, scrapers, and generator sets.

Precision-machined nozzle components and specialized metallurgy ensure accurate fuel atomization and clean combustion, supporting reduced smoke output, better fuel economy, and longer service life. Each injector is assembled using proprietary remanufacturing processes and subjected to strict reliability testing to verify spray pattern, opening pressure, and flow rate. The injector is also engineered to perform properly with low-sulfur, low-lubricity diesel fuels commonly encountered in modern field operations, helping protect the fuel system and the rest of the engine.

This injector directly replaces part number 557-7633 and cross-references 20R-8064 / 20R8064, CA20R8968, CA5577633, and CA20R8064, ensuring broad compatibility across the Perkins C9 engine platform. It is suitable for machines including 330D, 336D, 336D2, 340D2, 140M, 160M, 814F Series II, 815F Series II, and 816F Series II, along with industrial units such as MD5075, MD5075C, TH31-C9P, TH31-C9I, and CX31-C9I. Routine fuel system maintenance—including clean fuel, scheduled filter replacement, water separator draining, and periodic return-flow testing—helps maximize injector life and keep the engine running at rated performance.