Older Grohe shower fauct cap removal

[llh106]

Early 1980's vintage. Drips and would rather fix if I can than replace. No apparent slot to pop plastic cap off and neither plastic nor plastic plus metal screws out under reasonable force. Any help appreciated.

 

[Jadnashua]

You might find that the cap unscrews. Their tech support line is pretty good.

 

[Sponsor]

 

[llh106]

Thank you for responses. Turns out that there are ridges under the plastic cap that fit into slots in the metal part of the cap. Comes apart with about a 1/4 turn CCW. But pretty well seated after all the time it had been in place.

 

[TAM125]

Thank-you for your post! I just bought a home that has this 1988 vintage Grohe shower handle, and I haven't been able to figure out how to get the "cap" off, no set screw, no slot. So, did you replace it with a Grohe? If so, what model/part? Thanks!