Here we have a Bauer Fenner RT4100 IDL-0009. It is a heavy-duty rotary tensioner, suited for 3L, 4L, or 5L belts. Its design allows for easy installation and adjustment with a single bolt feature and comes in a variety of sizes and mounting styles.

The IDL improves performance and extends life for most fixed-center drives. The built-in spring mechanism absorbs momentary overloads and reduces vibration.

Always replace your existing parts with Bauer OEM Compressor Parts to ensure that you restore the unit to its original specifications and performance.