Replacing The Utility-Stitch Unit On Pfaff 1540 - Pfaff Select 1520 Service Manual

21. Replacing the utility-stitch unit on Pfaff 1540

Removal:
Loosen screw 5 (fig. 42).
Remove circlip 14.
Remove bolt 11.
Remove circlip 92.
Disconnect pull rod 93.
Detach feed regulator cranks together with connecting rod 10 to the left.
Loosen the three screws 94, 95 and 96.
Remove the complete utility-stitch unit downwards.
Note:
Before fitting the automatic unit, make sure that the two dot marks on the toothed segments are exactly
opposite each other (fig. 43).
Fitting:
Install the utility stitch unit in the machine.
Insert the two long screws 95 and 96 at the bottom and the shorter screw 94 at the top. Tighten them
lightly (fig. 41).
Place the feed regulator cranks onto the bolt of actuating crank 10 .
Insert bolt 11.
Refit circlip 14.
Move bolt 11 to the right, until the feed regulator cranks have no sideways play and move easily.
Tighten screw 5.
Re-attach pull rod 93.
Refit circlip 92.
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