Question 175General Subjects - 1st Asst/Chief

The correct answer is B) ensure that correct spring pressure is applied to the seating faces. When installing a mechanical shaft seal, it is critical to apply the proper spring pressure to the sealing faces. This ensures a tight, leak-free seal between the stationary and rotating components of the seal. Incorrect spring pressure can lead to premature seal failure or leakage. The other options are not the most important considerations when installing a shaft seal. A) is incorrect as the pump should not be running during initial installation and adjustment of the seal. C) is incorrect as the pump should not be run "dry" as this can damage the seal faces. D) is unnecessary, as the sealing faces are typically lapped or polished during manufacture.