3090385 Crankshaft Flange for Volvo FH12 D12A

What does a crankshaft flange do?

The compressor crankshaft flange acts as the vital connecting element that links the air brake compressor's crankshaft to the engine drive. It carries the bearing and seal seat on the drive side of the crankshaft, performing the essential duties of centering, sealing, and load transfer between the compressor housing and the crankshaft. This component is critical for maintaining stable operation in heavy-duty air systems.

Vehicle compatibility and engines

This specific part is compatible with Volvo FH12 trucks equipped with D12A engines. It is engineered to meet the rigorous demands of heavy commercial vehicle air brake systems, ensuring precise alignment during engine operation. Check the compatibility list.

Installation and maintenance guidance

For successful installation, technicians should verify that the pilot diameter, bolt hole circle, and seal seat size match the existing unit. Incorrect fitment can lead to rapid leakage or excessive vibration even if the part appears to fit initially. Regular inspection of the flange seat is recommended to prevent premature wear in the drive assembly.

Troubleshooting and selection

When replacing this component, ensure all mounting surfaces are clean to maintain a perfect seal between the housing and the crankshaft.

OE cross-reference

13 06 12 (Compressor Crankshaft Flange) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 3090385.