Toothed Belt Drives - Pfaff 3117 Instruction Manual

Adjustment
14

Toothed belt drives

.04
14 - 4
Requirement
The toothed belts 1 and 2 should be tight enough to guarantee a perfect transmission of
power. There should be virtually no noticeable play between the toothed belts and the
toothed belt cogs.
8
7
2
Fig. 14 - 03
Loosen nut 3 and bring the tightening roller 4 to a resting position by turning the lever 5
on the toothed belt 1.
Then press the tightening roller 4 another 5 mm more against the toothed belt 1.
Tighten nut 3 .
Loosen nut 6 and displace the tightening roller 7 by turning the eccentric 8 in accordance
with the requirement.
Tighten nut 6.
In the case of noise occuring, displace the tension rollers once again.
6
4
3
5
1