We may have found other answers which could help you.
Click here for Push Button Grohe CisternGroheEAU2 Dual flush cistern. The large flush button keeps breaking off?
Have I been charged way to much for having a loo mended?
How do I remove the fitting for the flush on my hidden cistern toilet?
Toilet Push Button not flushing properly?
Grohe 42181 toilet filler valve leaking?
Grohedal flushing?