Beisler 739-23-1 Service Manual - Manual (Page 36)

3.5 Toothed belt and material clamp transport
3.5.1 Tension of toothed belt
Caution! Risk of injury!
Switch off main switch!
Check and adjust tension of toothed belt only when the sewing
machine is switched off.
Consequences of excessive belt tension
–
Shorter service life
– Running noises
Consequences of insufficient belt tension
–
Nonconforming meshing between belt teeth and material clamp
– Skipping of teeth under load
– Varying transport lengths
Adjustment of setting
–
Loosen screws 2 and 3.
– Adjust tension of toothed belt by means of the hexagon bolts 1 and
4.
– Tighten screws 2 and 3.
3-36
2 1 4 3