[klondike98]

This is the link to the schematic in our library that jrblasde was pointing you toward. Its a pdf file you can download if you want and blow it up or view it on your browser. Looks pretty clear.

Here's a 610 rebuild thread by TV MAN from 2014 that might help. Somewhere in the middle I saw the tuning dial disassembled. There are surely other 610 threads in the Phorum that a search will reveal as well.

I restored a 610 some time back but my thread doesn't really have a lot of info in it. I no longer have that radio so I can't take a look at it.