Caterpillar original  295050-0331 C7.1 C4.4 Common Rail Fuel Injector for 320F 320GC 323F Excavator Engine Parts original new injector

Engineered for demanding heavy-duty operations, the CAT C4.4 fuel injector 295050-0331 delivers precise, repeatable fuel atomization within a high-pressure common rail system operating at 1,800–2,200 bar. Manufactured from high-strength alloys and CNC-machined to tight tolerances, each injector is OEM-calibrated and rigorously tested under industrial conditions to ensure stable injection timing, consistent spray patterns, and reliable cold-start performance across a wide range of operating environments.

Designed as a direct-fit replacement, this injector is fully compatible with CAT C4.4 and C7.1 engines, and through cross-reference configurations it can also be applied to selected Perkins engine models. It is widely installed in CAT excavators such as 320F, 323F, 324E, and 329E, as well as in loaders, motor graders, asphalt pavers, compactors, generator sets, and various industrial, mining, forestry, and agricultural machinery. Multi-hole nozzles combined with hardened internal components provide long-term durability, extended service life, and reduced fuel consumption under sustained heavy-duty workloads.

Routine maintenance is essential for maximizing injector performance and longevity. Operators are advised to replace fuel filters regularly, monitor fuel quality, perform periodic return-flow tests, and conduct ECU diagnostic scans. During installation, the fuel system should be thoroughly cleaned, sealing rings replaced, torque values verified, and pressure and ECU parameters confirmed. Symptoms such as hard starting, rough idle, power loss, abnormal smoke, misfire, knocking, excessive fuel consumption, or emission faults often indicate injector-related issues that this unit is built to resolve.