As you know, I always recommend automatic cleaning robots, since I’m passionate about anything that automates repetitive tasks. We recently purchased a a Conga, with which we are very happy, but we also had an iRobot Roomba 520 for about 7 years, which I have been improving with some new components.

Since few weeks ago the side brush of the Roomba stopped working. And we have 2 wonderful felines, that during some periods of the year spread hair all over the house. These hairs are filtered through all the components of the Roomba and that is why it is very important to clean the device so often, thus ensuring correct operation.

After cleaning the hairs that were stuck on the side brush as I usually do, I noticed that it was not spinning because there was excessive clearance between the gears. If the same thing has happened to you, do not worry, solving it is very simple.

Unscrew the side brush and remove it. Then unscrew the remaining screws and lift the main cover.

Remove the 2 small screws from the side brush motor.

Now you can remove the side brush module.

Remove the main screw. I did not have a screwdriver of that type so I used a smaller plane to remove it.

It was time to prepare the piece that will help us solve the problem. Cut off the cap of a plastic bottle, so that only the flat surface remains, adjusted to the diameter of the gear.

Reassemble all the pieces and you’re done. I hope this helps you solve the problem with your Roomba.