When replacing a propulsion turbine journal bearing, the rotor must be lifted vertically to what maximum height to ease the removal of the lower half of the bearing?

When replacing a propulsion turbine journal bearing, the rotor must be lifted vertically to what maximum height to ease the removal of the lower half of the bearing?

• A. .001 inch
• B. .005 inch
• C. .010 inch
• D. .015 inch

Answer: (B)

Lifting the rotor vertically to a specific height is crucial for the proper removal and installation of the lower half of a propulsion turbine journal bearing. The height of .005 inch is optimal as it provides just enough clearance to facilitate the removal process without creating excessive stress or misalignment. If the rotor is not lifted sufficiently, the lower half of the bearing may be tightly held in place, making it difficult to extract without causing potential damage. Conversely, lifting it too high can lead to misalignment and may not be necessary as it could complicate the reinstallation process. Therefore, the .005 inch lift strikes an ideal balance, ensuring that the bearing can be safely and effectively removed while minimizing the risk of impacting the operational integrity of the turbine system.

Lifting the rotor vertically to a specific height is crucial for the proper removal and installation of the lower half of a propulsion turbine journal bearing. The height of .005 inch is optimal as it provides just enough clearance to facilitate the removal process without creating excessive stress or misalignment.

If the rotor is not lifted sufficiently, the lower half of the bearing may be tightly held in place, making it difficult to extract without causing potential damage. Conversely, lifting it too high can lead to misalignment and may not be necessary as it could complicate the reinstallation process. Therefore, the .005 inch lift strikes an ideal balance, ensuring that the bearing can be safely and effectively removed while minimizing the risk of impacting the operational integrity of the turbine system.