Hans Grohe Shower Head Disassembly Guide: Preserve & Unscrew Handset Safely

ladies

How to disassemble such a handset?
I would like to preserve it. I tried to unscrew the middle, but it won't go.

Depends on what tools you have. I once disassembled an older groh and it turned out that the force solution was the only one, the elements of the handset are pressed in, the manufacturer does not provide for servicing, everything is held with a latch.
Also, it would be "simply" to pull out the part with nozzles by force, the problem is in the even application of force, one-sided undermining unfortunately threatens to break the catch or deform the edge, which will end with several additional side streams
I managed with the help of a colleague, undermining the moving element at the same time from four sides with spatulas (the strongest thing we could squeeze between the body and this movable ring)

But maybe you have access to a spring puller or a bearing squeezer? some multi-armed tool that will allow you to apply an equal force all around.

101pawel wrote:

Unscrew the handset from the hose and put it in a container with hot water with dissolved citric acid.

It wasn't a scale problem, just a lack of slip on the nozzle selector switch gasket. I wanted to take it apart, grease it and put it back together. No stone inside. Unfortunately, a good handset went to "scrap".
It can only be folded due to the one-way three hooks.