1518349 Crankshaft Flange for Volvo F12 TD121

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 ensures that the drive—whether via gear, belt-pulley, or coupling—reaches the crankshaft in a perfectly centered position.

Vehicle and engine compatibility

This specific flange is designed for Volvo F12 models utilizing TD121 engines. It is engineered to meet the rigorous demands of heavy commercial vehicle operations, providing a stable interface within the air brake system to prevent leaks or excessive vibration during operation.

Installation and maintenance guidance

When performing maintenance or replacement, technicians should verify the pilot diameter, bolt hole circle, and seal seat size against the original component. Proper installation is critical to ensure correct load transfer and to prevent premature wear of the compressor seals or bearings.

Troubleshooting vibration and leaks

If you encounter unusual vibrations or air leakage near the compressor drive side, inspecting the crankshaft flange is a recommended step. Consult your authorized distributor.

OE cross-reference

13 13 13 (Compressor Crankshaft Flange) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 1518349.