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Place the rotor into vice or similar (without clamping) and knock the rotor out of the large
bearing with light blows using a plastic mallet. The ball bearing with ventilation ring can be
exchanged. Install the ventilation ring with the shoulder facing towards the ball
bearing.
Remove circlip from the small ball bearing.
Knock out the small ball bearing with a pin or drift. Rotor with air motor ring or bearing with
shim and circlip can be exchanged.
Assembly to take place in reverse order. Place the shim on the rotor, plug on the small ball
bearing and knock it down against the stop with the plastic mallet, then assemble the circlip.