4BTA3.9 Cummins Tensioner 3937553 Parts Catalog Ref No. Part Name Part No. Required 1 Flat Head Cap Screw 3286480 2 2 Tensioner 3937553 1 3 Hexagon Flange Head Cap Screw 3282699 1 4 Belt Tensioner Bracket 3966782 1 Above is the introduction of the Cummins Tensioner 3937553, while if you need Tensioner 3937553, complete Cummins engine or other Cummins …