original 557-7627 Fuel Injector Assembly for C7 C9 Engine Excavator E325D E329D E330D E336D 5577627 10R-7222 387-9433 263-8218 Diesel Fuel Injector Nozzle original new injector

Engineered for demanding heavy-duty diesel operations, this common rail fuel injector 557-7627 delivers precision fuel metering and reliable atomization for C7, C7 ACERT, C9, and C9.3 diesel engines. The unit is offered as an original, remanufactured, or aftermarket replacement and is cross-referenced under 20R-9079, 387-9427, 10R-7225, 20R-8066, 268-1835, 295-1411, 328-3585, 713431AT, CA5577627, and CA3879427, giving procurement teams multiple sourcing options for consolidated fleet maintenance.

The injector supports injection timing, pressure control, combustion optimization, and emission-control performance, contributing to stable engine power, cleaner combustion, improved fuel economy, smoother idle, reduced exhaust smoke, and lower risk of damage from poor fuel delivery. Typical machine coverage includes 324D, 325D, 326D L, 328D LCR, and 329D excavators; 950H, 962H, 966D, 966E, and 966F wheel loaders; 12K, 12M, 120K, 120K2, 140K, 140K2, 140M, and 160K motor graders; M325D MH material handlers; 525C, 535C, and 545C wheel skidders; and AP-755, AP-1055D, BG-2455D, and BG-260D asphalt pavers, plus industrial and petroleum engine applications.

Because fuel-system contamination is the leading cause of premature injector failure, we recommend clean diesel fuel, regular filter replacement, water-separator inspection, return-flow testing, and ECM fault-code scanning. Confirm 557-7627 or an approved cross number against engine and machine serial numbers before installation. This injector is widely supplied to repair shops, fleet operators, diesel-parts distributors, mining contractors, and global exporters.