I used a 10 mmr socket wrench. In the Solis 836 there are two metal and two rubber washers.

My Solis had a washer on top of the bearing and removed it with a screwdriver from the axis outward. Took a toothbrush to clean and then wd40. Then i sprayed wd40 silicon lubricant to remove the wd40. For lubrication I used bike chain oil. I hope it is thick enough to stay in the bearing. Reassembled and it works fine.