Kärcher ARMADA BRC 40/22 C Manual page 17

The lower deck can be removed from the upper deck housing.
Using a T20 Torx driver, remove the 4 screws holding the
brush drive housing and brush motor to the lower deck frame.
To access the motor mount screws, the belt cover must be
removed. Using a T20 Torx driver remove the 4 screws holding
the cover on.
Disconnect the brush motor and thermistor harnesses from
the main harness. Lift the motor out of the lower deck
assembly.
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