Positioning the toothed belt wheels
28 Service Instructions 827/827-M - 01.0 - 05/2019
To position the upper toothed belt wheel:
1. Disassemble 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. 14: Positioning the lower toothed belt wheel
Proper setting
The 2 threaded pins for the lower toothed belt wheel (3) are seated flush
on the flat of the lower shaft.
The toothed belt (1) runs correctly without running against the snap
ring (2) or slipping off.
To position the lower toothed belt wheel:
1. Tilt the machine head ( p. 14).
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) - Snap ring
(3) - Lower toothed belt wheel
(4) - Threaded pins
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