Lenovo Robotic User Manual page 21

Routine Maintenance
Sensors
Wipe Robot sensors with a soft, dry cloth, including:
1) Wall sensor on the right side of Robot
2) Four anti-drop sensors on the bottom of Robot
3) Infrared anti-collision sensor in front of Robot
Infrared collision protection sensor
Wall sensors
Anti-drop Sensors
Universal wheel
(recommended monthly cleaning)
Turn robot vacuum upwards, pull out the universal wheel,
clean up the wheel body, hair and dirt on the axle, and then
reinstall and compress it.
Wheel body
Axle
Bracket
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