Pfaff 1425 Instruction Manual page 79

11 Tansmission linkage (only on the PFAFF 1426)
.06.08
Requirement
With the thread trimmer in its resting position, transmission cranks 3 and 4 must stand
parallel with each other.
+
3
Fig. 11 - 36
Set the thread trimmer at its resting position.
Adjust transmission linkage 1 (screws 2) according to Requirement.
-
If problems occur in thread catching on the left sewing hook, the catcher stroke
can be increased (+) or decreased (-) by turning transmission crank 3.
2
1
Adjustment
4
11 - 43