Pfaff 937

Adjustment
11.05.22 Drive belt in the gearbox housing
Requirement
Drive belt 4 must be tightened so that the machine runs freely and the belt sprockets
do not have any noticeable play.
● Loosen screw 2.
● Move eccentric bearing bush 1 until drive belt 4 is in the middle of bobbin case opener
drive wheel 3 and turn it in accordance with the requirement.
● Tighten screw 2.
3
1
2
4
Fig. 11 - 24
11 - 24