20569224 S3 Crankshaft Flange for Volvo FH12

What does a crankshaft flange do?

The compressor crankshaft flange serves as a vital connecting element that links the air brake compressor's crankshaft to the engine drive. By carrying the bearing and seal seat on the drive side of the crankshaft, this component jointly undertakes the centering, sealing, and load transfer duties between the housing and the crankshaft. This ensures that the drive reaches the crankshaft in a perfectly centered position.

Compatible Volvo FH12 models

This specific flange is compatible with Volvo FH12 models, including variants such as FH 12/340, FH 12/380, FH 12/420, FH 12/460, and FH 12/500. It is engineered to meet the high-performance requirements of heavy commercial vehicle braking systems, maintaining structural integrity under continuous operating pressure.

Installation and maintenance guidance

For successful installation, technicians should verify the pilot diameter, bolt hole circle, and seal seat size against existing components. Even if a part appears to fit, mismatched dimensions can lead to rapid leakage or excessive vibration. Ensuring the drive type—whether gear, pulley, or coupling—matches the compressor configuration is essential for preventing premature wear.

Troubleshooting and selection

Check the compatibility list.

OE cross-reference

13 01 13 (Compressor Crankshaft Flange) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20569224S3.