Dynamic Load Amplitude of Centrifugal Pump

Hi Everyone, can i ask you question..

I have a project, it is design a platform for water intake pump.

The questions is:

1. Is it input for my model correct?

2. I can't find amplitude from pump specification, is it 24840 (kg) - 20700 (kg) = 4140 kg?

3. If Amplitude 4140 kg (41.4 kN), my time history displacement is 0.282 mm and it is out from govern for the project specification.. (CHECK MY WORD FILE)

I hope someone can help me explain about dynamic load analysis and amplitude that should i use for this project, based on pump specification.

Thank you very much, Regards.