Pfaff 421E1 - Adjusting the Thread Trimmer -900;61; Preadjusting the Control Cam

Adjustment
13.05 Adjusting the thread trimmer -900/61
13.05.01 Preadjusting the control cam
Requirements
1. With the needle bar at BDC, the recess 3 must be pointing downwards vertically.
2. The control cam 1 must be touching the retaining collar 4 on the left.
1
2
4
3
13 - 23
Fig. 13 - 19
● Position the needle bar at BDC.
● Turn or move the control cam 1 (screws 2) in accordance with the requirements.