Bosch dishwaher shu 4322 uc/u12

Hello can some body tellme how to replaced the drainning pump on this model it working but make a humming noise on start up and at the end of the cycle.

Thank you

Remove outer door skin and kick plate at base pump will be on view turn off power look carefully at pump you will see a lever you have to cut away a small section of plastic on lever to be able to push it inwards pump then twists off anticlockwise is a bayonet fitting like a light bulb.

hope this helps