Then I did disassemble the bottom part too to do the same cleaning and add new grease:
06.jpeg
Then I did cleanup the heads with Acetone and Isopropyl alcohol. But I also took a look à the eject motor stuck in a bad position:
07.jpeg
No missing tooth on gears.
So I assembled the drive back and made a test, and it did read the floppy disk on the first attempt:
08.jpeg
But the drive would not eject the floppy disk when asked 🙁
So I took the drive out once again and took a look at the eject mechanism again and found the contact was not working:
09.jpeg
I spent quite a lot of time fixing this but when I reassembled the floppy disk drive, if would not work better, if was reading fine but not ejecting.
In fact, the motor had no reaction at all. Then I did cleanup the eject mechanism of another very rusty drive to swap them out.
Finally I had a working drive ejecting floppy disk properly when I throw them in the trashcan:
10.jpeg
And this last fix granted me with a fully working Quadra 700 (except the missing buttons).
Full video fully English subtitled can be found here: https://youtu.be/4WDX6auE0ZA
Rodrik