In article ,
says...
Part numbers required for the loading and capstan belts for this unit.
Thanks in advance. Art

VM407712 = 4835 358 37149
VM407711 = 4835 358 37148

Check the little white plastic lock on the loading pulley
worm shaft. If it is cracked, it will let the shaft migrate
and come back apart. Common failure. If so, replace shaft
or maybe freeze its position with a tiny amount of glue.