Perkins original Perkins Fuel Injector 20R-8968 20R8968 387-9427 557-7633 392-0205 for C9 C7 Excavator Engine Parts new injector original new injector

The Perkins C9 Fuel Injector 20R-8968 / 20R8968 is an original remanufactured electronic unit injector engineered specifically for Perkins C9 diesel engines, including C9 industrial, C9 machine, and C9 petroleum package configurations. Authorized as OE part number 20R-8968, it directly replaces 557-7633 / 5577633 and cross-references 20R-8064 / 20R8064 along with CA20R8968, CA5577633, and CA20R8064. Built to original Perkins specifications using specialized metallurgy and proprietary manufacturing processes, each injector undergoes engineering updates and reliability testing to deliver like-new performance.

This injector is designed for the demanding conditions of heavy equipment service and is compatible with Perkins C9-powered excavators such as the 330D, 330D L, 330D LN, 330D MH, 330D FM, 336D, 336D L, 336D LN, 336D2, 336D2 L, 336D2 GC, 336D2 XE, 336D2 LXE, 340D L, and 340D2 L. It also supports motor graders including 140M, 140M Series 2, 14, 14L, 150, 160, 160M, and 160M Series 2, as well as wheel dozers 814F Series II, 815F Series II, and 816F Series II. Additional applications include 627G, 637G, 973C, 521B, 522B, 532, 541, 552, 2390, MD5075, MD5075C, TH31-C9P, TH31-C9I, and CX31-C9I.

Precision fuel metering and optimized diesel atomization ensure stable combustion and efficient power delivery, while the heavy-duty design withstands low-sulfur, low-lubricity diesel fuels commonly encountered in field operations. For maximum service life, operators should maintain clean fuel, replace filters on schedule, drain the water separator, inspect fuel tanks, monitor for symptoms such as hard starting, rough idle, black or white smoke, power loss, and injector fault codes, and follow the engine service manual for return-flow and balance testing procedures.