Bayer HealthCare RapidPoint 400 Series Service Manual page 347

b. Pry the pump roller cage free of the motor shaft while pulling the
motor toward you.
c. Remove the second pump roller cage by prying it free of the motor
shaft.
5. Install the new pump roller cages:
a. Slide the roller cage onto the shaft of the motor housing with the flat
of the cage towards the flat of the housing.
b. Push the roller cage until the cage is fully seated.
c. Replace the motor and press until the cage and motor are fully
seated.
d. Replace the four screws.
6. Check that there is a gap between the roller cages.
Rev. C Replacing Components 347