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Genuine Cummins rocker lever shaft assembly, part number 3074375, for Cummins N14 and 855 engines. Replaces Cummins 3066221 and 3072351.
Key Features:
Specifications:
Compatibility / Fitment:
Fits Cummins N14 and 855 engines using rocker lever shaft 3074375.
Hard fitment gate — match the shaft number:
Cummins uses two rocker lever shafts on these engines that look alike: 3074375 (this part, replacing 3066221 and 3072351) and a second shaft under a different number. They aren’t interchangeable. Read the number on the shaft you are replacing before ordering.
Installation: inspect the rocker lever bushings and shaft bores for wear, lubricate the shaft with clean engine oil at assembly, and torque the rocker housing to Cummins specification.
Common interchanges: 3066221, 3072351
Conclusion:
Cummins 3074375 is the genuine rocker lever shaft assembly for N14 and 855 engines, replacing 3066221 and 3072351. Confirm you need 3074375 rather than the similar second shaft before ordering.