What is a precaution to take before jogging the turbine turning gear?

Before jogging the turbine turning gear, confirming that the lube oil pump is running is crucial for ensuring that the turbine and associated components are properly lubricated. The lubrication system plays a vital role in preventing wear and tear on moving parts. If the lube oil pump is not operational, there is a risk of friction and overheating, which could lead to serious damage to the turbine assembly during startup or operation.

The turning gear itself is used to rotate the turbine slowly for various reasons, including uniform temperature distribution and preventing thermal distortion of the rotor. Without adequate lubrication, the bearing surfaces may not receive sufficient protection, leading to premature failure. Therefore, ensuring that the lube oil pump is functioning properly is a necessary precaution before proceeding with jogging the turbine turning gear.