Pfaff expression 2014 Service Manual page 71

Attach spring 9.
Set the base plate against the machine.
Mount both connection plugs 3 and 4 on the circuit board.
Now the following adjustments are to be carried out:
Section 3: Timing of the feed motion
Section 4: Adjustment of feed dog height
Section 5: Adjustment of synchronizer
Section 11: Adjustment of hook-to-needle clearance
Section 12: Hook timing
Section 13: Adjustment of needle bar height
Section 14: Adjustment of bobbin case position finger
Install cable.
Insert the buttonhole sensor.
Attach the free-arm cover and secure with both fastening screws 5.
Bring the feed dog lowering mechanism to its normal working position.
Engage both feed regulators 6.
Attach the cable clip.
Secure the base plate with the three fastening screws to the housing.
Now the following adjustments are to be checked or carried out:
Section 17: Adjustment of bobbin thread tension
Section 18: Adjustment of needle thread tension
After a running-in time of approx. 10 min. - Section 21: Adjustment of equal forward and reverse stitch
length.
Use testing appliance ABB Metrawatt M 5013 to carry out an electrical safety test according to
VDE 0701.
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