Caterpillar original Common Rail Fuel Injector 155-1819, 10R-1265, Compatible with C9.3 Engine, Replacement for OEM Parts, Cross Reference 173-9272, 304-3637 for 336E Excavator original new injector

As a precision-built fuel system component purpose-engineered for Caterpillar diesel platforms, the 155-1819 fuel injector delivers uncompromising OEM-grade performance for demanding industrial operations. Manufactured to meet Caterpillar’s strict OEM specifications, this original Caterpillar (CAT) injector is validated for compatibility with the full C9.3 engine series, including CAT C9.3, C9.3B, C9.3 ACERT, industrial C9.3 and C9.3 power unit variants. It is a direct-fit replacement assembly that integrates seamlessly with factory fuel system configurations without modification.
The injector operates as a high-precision fuel metering device regulated by engine ECM signals, which control injection timing and duration to match real-time operational demands. Its hardened internal wear surfaces, advanced precision nozzle and controlled needle valve action produce a finely atomized fuel mist with an optimized spray pattern to support complete, efficient combustion. This design delivers tangible benefits including improved power output, reduced fuel consumption, lower emissions, stable engine performance and extended service life under extreme heavy-duty conditions.
Suitable for a wide range of heavy-duty equipment, the 155-1819 injector is used across construction, mining, power generation, marine and industrial sectors. It fits equipment categories including hydraulic excavators, wheel loaders, motor graders, generator sets, mining equipment, industrial power units, marine equipment and material handling machinery. Backed by a 12-month warranty, it delivers reliable long-term performance when installed per OEM guidelines and maintained with quality fuel and regular filter replacements.