Husqvarna Automower friction disk bearing replacement. Lesson Learn (see description)

Procedure for replacing friction disk bearings for Husqvarna 450x 430 450 and others.
Bearings are 6800RS
10mmx19mmx5mm
two bearings are required.
Here is what I learned. I initially got the 6800ZZ bearings thinking that would suffice, but they got wet and moisture got inside and they failed within a coupe weeks. The ZZ are shielded from debris but not moisture. The "RS" are rubber seal.