Positioning the toothed belt wheels
30 Service Instructions 867-M PREMIUM - 03.0 - 05/2017
The distance between the winder wheel (3) and the upper toothed belt
wheel (1) must be 0.8 mm.
The toothed belt (4) runs correctly without running against the retaining
ring or slipping off.
To position the upper toothed belt wheel:
1. Remove the arm cover ( p. 17).
2. Push the toothed belt (4) sufficiently far to the side so that the 2 threaded
pins (2) can be reached.
3. Loosen the threaded pins (2).
4. Turn the upper toothed belt wheel (1) so that the threaded pins (2) are
seated flush on the flat of the arm shaft (5).
5. Move the upper toothed belt wheel (1) to the side so that the distance
to the winder wheel (3) is 0.8 mm.
6. Tighten the threaded pins (2).
7. Push the toothed belt (4) back.
6.2 Positioning the lower toothed belt wheel
Fig. 19: Positioning the lower toothed belt wheel
Proper setting
The 2 threaded pins for the lower toothed belt wheel are seated flush on
the flat of the lower shaft.
The toothed belt (1) runs correctly without running against the retaining
ring (2) or slipping off.
To position the lower toothed belt wheel:
1. Tilt the machine head ( p. 16).
2. Loosen the threaded pins (4).
3. Turn the lower toothed belt wheel (3) such that the threaded pins (4)
are seated on the flat of the arm shaft.
(1) - Toothed belt
(2) - Retaining ring
(3) - Lower toothed belt wheel
(4) - Threaded pins