Positioning the toothed belt wheels
Service Instructions 878-M PREMIUM - 03.0 - 10/2019 25
6 Positioning the toothed belt wheels
Proper setting
The two toothed belt wheels must be positioned above each other so that 
the toothed belt can run correctly. The winder wheel is located directly next 
to the upper toothed belt wheel and determines its alignment. 
Important
The position of the upper toothed belt wheel is defined by the distance to 
the winder wheel.
Therefore, you must first align the upper toothed belt wheel on the winder 
wheel and then align the lower toothed belt wheel so that the toothed belt 
runs correctly over both wheels.
6.1 Positioning the upper toothed belt wheel
Fig. 14: Positioning the upper toothed belt wheel
Proper setting
The two threaded pins (4) for the upper toothed belt wheel (1) are set flush 
on the surface of the arm shaft (2).
WARNING
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before positioning the 
toothed belt wheels.
(1) - Upper toothed belt wheel
(2) - Surface of arm shaft
(3) - Winder wheel
(4) - Threaded pins
(5) - Toothed belt