iRobot Roomba Discovery 4 Series Servicing And Repair Manual page 6

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2- Push with both thumbs
at points (A) and (B) in order
to take the front bumper
out of its sockets.
3- To replace the top cover you
may want to remove the front
bumper, though this may not
be necessary. Using a pair of
pliers, disconnect the bumper
from its connector, as
pictured.
Chapter 2: How to Open Roomba / Replace Frame
Point (A)
6
Point (B)