A4421311342 Mercedes-Benz Compatible Compressor Crankshaft Flange

What does a crankshaft flange do?

This compressor crankshaft flange acts as the vital connecting element between the air brake compressor's crankshaft and the engine drive. It performs the essential duty of centering, sealing, and transferring loads between the housing and the crankshaft, carrying the bearing and seal seat on the drive side.

Vehicle and engine compatibility

This specific component is compatible with Mercedes-Benz CONECTO (O 345) vehicles, including M, UE, H, and CONECTO C variants equipped with OM 447 HLA engines. It ensures that the drive mechanism—whether gear, belt-pulley, or coupling—reaches the crankshaft in a perfectly centered position.

Installation and maintenance

For workshop technicians, it is crucial to verify that the pilot diameter, bolt hole circle, and seal seat dimensions match the existing part. Correct installation prevents premature leakage or excessive vibration within the pneumatic system. Always check for wear on the seal seat during inspection.

Troubleshooting and selection

Selecting the correct flange based on engine specifications ensures long-term reliability in heavy commercial vehicle service environments.

OE cross-reference

7500 100 003 (Compressor Crankshaft Flange) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number A4421311342.