Did mine a few months ago. As everyone above has said, it is pretty fiddly, and if yours are anything like mine and full of crud, it’s not too easy at first to see how it all comes apart.
The 8 allen bolts that hold the black cage are pretty soft and are loctite’d, so use a good fitting allen key or they’ll round out easily.
Once the red end plate is off, there is a cap pressed into the end of the axle. This is where the ‘pop up’ spring locates. Clean the crud off and you’ll just see two tabs where it rebates into the end of the axle. A fine screwdriver should prise the cap off. Then you’ll get to the bearings as whyter describes. Think 11 each end IIRC, but they are tiny so beware of fridge suck.
Just take your time and have a clean work area so you can find all the bearings when they fall out.
Good luck!
Rob