Thanks for the quick answer.
I already cleaned and lubricated with Singer sewing machine oil where Pioneer suggested (there's a sticker pointing at a hole. Is this the motor bearing?) and the platter spindle from above.
I turned the TT on for a couple of hours, belt-less.
The motor bearing turns silently.
Once platter is assembled back, there's instead a light scratching noise like something is rubbing/interfering at each turn.
I haven't disassembled anything yet.
Since the belt was missing, I just used a (thin) rubber belt (elastico, in Italian) long enough to fit the platter.
Of course it's an emergency solution, just to see it turning.
And I'm waiting for the original rubber belt I meantime bought in ebay.
Seemingly platter spindle and motor bearing rotate correctly (RPM), but I've no way to measure its right turning.
Comments are welcome.
vincitsemper wrote:Ciao Alberto,
Have you cleaned and lubricated to platter's spindle and motor bearing?
If the speed is unstable this is probably due to either belt, you may need a new one, dried up grease in the platter spindle or motor needing some oil.
You will need some thin service oil, like the type used in sewing machines.
I would not start taking the deck apart, initially just get a new belt and only remove the platter spindle in order to clean it and the well it sits in.
The PL12Ds motors are fairly good, just add oil and make it run for a few hours without the belt fitted.
Buona fortuna e mandami un messaggio privato se ti serve piu informazione.