Since Altendorf is a premium German sliding table saw manufacturer, their official manuals are not always freely hosted on generic sites. Try these sources:
The F90’s most unique feature is the – never force the handwheel if it resists; the manual shows how to bleed the hydraulic cylinder. altendorf f90 manual
Move the belt: Outer pulley grooves are for lowest speeds; inner grooves are for highest. Since Altendorf is a premium German sliding table
If you find a German/English manual, these sections are critical: these sections are critical: