To replace the side brush module, loosen the side brush screw with a screw
driver and remove the side brush. Loosen the 4 screws to
remove the bottom cover. Remove the bottom cover. Loosen the 2 screws that retain
the side brush module. Remove the side brush module
from the robot. Install the replacement side brush module. Tighten the 2 screws that retain
the replacement side brush module. Remove the side brush. Replace the bottom cover and
tighten the four retaining screws. Replace the side brush and
side brush screw.