To replace Junior’s bumper, you’ll need a Phillips head screwdriver, the flat-head screwdriver included in Junior’s box, and a new bumper.
Before starting any repair on Junior, turn his side power switch OFF and remove his dustbin.
Then, flip Junior over onto a flat surface and remove his main brush using the flat head screwdriver. Keep all removed screws and parts safely aside, as they may be needed for later reassembly.
Use a Phillips head screwdriver to remove the 7 screws on Junior’s underside that hold him together.
Junior’s cover is no longer secured, so hold the top and bottom together as you carefully flip him back onto his wheels. Grip Junior’s cover from the back and lift up to expose the mainboard.
Slide the power inlet down and tuck it somewhere safe to avoid compressing its wires.
To detach Junior’s cover completely, disconnect 4 circuit plugs.
Junior’s cover is now completely detached and can be set aside for the rest of the repair.
Flip the cover over onto a flat surface and you’re ready to remove the bumper. First, remove the 2 springs on either side of Junior’s screen.
Remove the 4 screws securing the bumper to Junior’s cover.
Lift the bumper to detach. It will separate into 3 pieces: a large exterior piece, a small wired piece, and a plastic strip.
To install your new bumper, lay down the large exterior piece first. Place the cover on top so the screw posts on the exterior piece protrude through the holes on the cover.
You may need to lift the bumper slightly as you lay down the final wired piece, the obstacle sensors. Make sure it lines up with the screw posts on the interior of the cover and that no wires are compressed.
Next, clip the plastic strip to the front of the exterior piece so it fits flat in the opening.
Hold everything together as you reinstall all 4 screws securing the bumper to the cover.
Finally, replace the 2 springs on Junior’s cover. The curved edge hooks into a small slot on the bumper, while the straight edge hooks under a screw on the inside of Junior’s cover.
Now you’re ready to reconnect Junior’s cover. Reattach all 4 circuit plugs connecting Junior’s cover to the mainboard.
Remember to slide the power inlet back into its space on Junior’s cover.
Align the cover’s edges precisely. Then, flip Junior over onto a flat surface.
Ensure that no wires are compressed in the main brush compartment or visible at the edges of the bumper. If so, take a step back and lift the cover to tuck the wires into the appropriate spaces inside Junior.
Once the wires are all safely tucked away and Junior’s cover is aligned properly, reinstall all 7 screws previously removed from Junior’s underside.
Install the main brush and dustbin before your next use and Junior is completely reassembled!