The main bearing cap with code 11.01254-0168-1.B is a structural cornerstone of the MAN L21/31 engine, designed to securely hold the crankshaft's main bearings in place. Subjected to tremendous mechanical forces, this component ensures that the rotating crankshaft remains perfectly aligned during engine operation. Precision-machined and built to withstand stress, the main bearing cap plays a vital role in maintaining engine balance, minimizing vibration, and extending the lifespan of internal components in high-load marine or industrial environments.