20547525 S3 Compatible Crankshaft Flange — Volvo B12

The 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 performs the essential functions of centering, sealing, and load transfer between the compressor housing and the crankshaft. This ensures that the drive—whether via gear, pulley, or coupling—is transmitted smoothly to the compressor.

This specific flange is designed for use in Volvo B12 engines. It is engineered to withstand the high-pressure environments found in heavy commercial vehicle air systems. When replacing this component, technicians should verify that the pilot diameter, bolt hole circle, and seal seat dimensions match the existing unit to prevent leakage or excessive vibration during operation.

Proper installation of this flange is critical for maintaining air system integrity. Technicians should inspect the seal seat and bearing seat for any signs of wear before assembly. Ensuring correct torque on mounting bolts prevents uneven load distribution, which can lead to premature failure of the compressor seals or bearings.

Consult your authorized distributor to ensure exact fitment for your specific engine configuration.

OE cross-reference

13 01 13 (Compressor Crankshaft Flange) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20547525S3.