The 3934816 Belt Tensioner is designed for Cummins Engine 4BT3.9, compatible with part numbers 3934814, 3934816, 3936197, 3978021, and 3976833. Engineered for reliability and performance, it ensures optimal belt tension and extended engine life.
Supersedes:3934814 3934816 3936197 3978021 3976833 3957433
