Siemens SIDOOR ATD4 W Series System Manual page 209

Ensure that the drive pinion and deflector pulley are aligned when doing so. They have to be
exactly aligned to ensure a long drive service life.
3. Pass the toothed belt over the deflector pulley and drive pinion. Place both open ends of the
toothed belt in the door clutch holder. Screw the door clutch holder together.
4. Tension the toothed belt with the aid of the tensioning device.
ATD4xxW for industrial applications
System Manual, 06/2022, A5E51901827B AA
Geared motors
6.2 Installation
207