Pfaff 3811-11/43, Instruction Manual

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21.2 Carry out a control.
21.2.1 Machines without the thread trimmer -900/..
Requirement:
When the hook carrier 3 (fig. 4) is standing vertical, the clearance between the
highest point of the back of the hook and the needle plate support surface
should be 0.7 mm (fig. 5).
.1 Remove the cover plate 4 (fig. 6). Remove the needle plate 5 and the feed dog 6.
.2 Lay the adjustment gauge (No. 61-111 642-19) onto the needle plate support surface (fig. 5).
.3 Position the hook carrier 3 vertically (handwheel).
.4 Loosen the screws 7 (fig. 4) and 8 for the eccentric bearing pin 9.
.5 Carry out the adjustment in accordance with the requirement (eccentric bearing pin 9).
.6 Tighten screws 7 and 8.
.7 Carry out a control.
If the required clearance of 0.7 mm is not reached, continue with points .8 and .9.
.8 Replace the spacer 10 (fig. 8) (screw 11).
.9 Position the hook blade parallel to the side edge of the needle plate cutout (fig. 7) (screw 11).
21.2.2 Machines with the thread trimmer -900/..
Requirement:
When the hook carrier 3 (fig. 4) is standing vertical, the clearance between the
highest point on the back of the hook and the bottom of the thread trapper 12
should be 0.3 mm (fig. 8).
.1 Remove the cover plate 4 (fig. 6). Remove the needle plate 5 and the feed dog 6.
.2 Position the hook carrier 3 vertically (handwheel).
.3 Loosen screw 7 (fig. 4) and 8 for the eccentric bearing pin 9.
.4 Carry out the adjustment in accordance with the requirement (eccentric bearing pin 9).
.5 Tighten screws 7 and 8.
.6 Carry out a check.
If the required clearance of 0.3 mm is not reached, continue with points .7 and .8.
.7 Replace the spacer 10 (fig. 8) (screw 11).
.8 Position the hook blade parallel to the side edge of the needle plate cutout (fig. 7) (screw 11).
Bi21-01