In order to align a pump and motor, usually you need to:

To align a pump and motor effectively, moving the motor is often the necessary action. Proper alignment is crucial for the efficient operation of a pump-motor system as misalignment can lead to increased wear, vibration, and potential failure of both components. When the motor is adjusted, it allows the shafts of both the pump and motor to be aligned precisely, minimizing stresses on bearings and seals.

Adjusting the position of the motor provides the means to achieve the correct alignment to ensure that the rotational axes of the motor and pump shafts are collinear. This is often accomplished by moving the motor in relation to the pump while ensuring that the proper gap and alignment specifications are met.

In this scenario, while moving the pump or adjusting the shaft coupling may seem like viable options, they do not typically yield the best results for achieving precise alignment when a misalignment exists. Loosening the mechanical seal may cause other complications and is not a standard practice for alignment. Hence, focusing on the motor adjustment is generally the most effective method for aligning the pump and motor correctly.