The shaft seal K 74149 is a high-performance sealing component designed specifically for the rotating assembly of part K 74123 in the ZV40/48 engine. Engineered to withstand high rotational speeds, thermal changes, and exposure to fuel and lubricants, this seal maintains a reliable barrier that prevents fluid escape and protects internal components from contamination. Its robust elastomeric construction ensures long service life, reduces wear, and supports smooth, efficient operation of the shaft mechanism, making it essential for maintaining the overall integrity of the assembly.