Pfaff 3811-2/45 Instruction Manual page 46

.1 Raise the presser foot (hand lever).
.2 Remove the cover plate 4 (fig. 6). Remove the needle plate 5 and the feed dog 6.
.3 Loosen the screw 13 (fig. 10) in the hook carrier 3.
.4 Position the hook carrier 3 vertically (handwheel).
.5 Lay the hook adjustment gauge 14 (Part No. 61-111 643-06) against the left edge of the cover plate
guide (arrows in fig. 9) and slide it against the hook. Bring the Hook to rest against the gauge.
.6 Tighten the screw 13 in the hook carrier 3.
Requirement:
.1 Turn the handwheel until the hook point, coming from the right hand side, reaches the left side of the
needle.
.2 Loosen the hook unit 15 (fig. 11) (screws 16).
.3 Align the hook unit 15 in accordance with the requirement.
.4 Tighten screws 16.
.1 Bring the hook to its right turning point (handwheel).
.2 Loosen screw 17 (fig. 13) in the hook carrier.
.3 Lay the 3.6 mm feeler gauge (fig. 12; adjustment gauge 61-111 643-06) against the needle with its
notch facing in the direction of feed.
.4 Taking care that the drive connecting rod 18 is standing vertically, turn the eccentricc ball pin 19 until
the hook point touches the right hand edge of the feeler gauge (6 mm open ended wrench).
.5 Tighten screw 17 in the hook carrier.
46
Bi21-15
Viewed in the direction of sewing, the clearance between the hook point and
the needle should be approx. 0.1 mm (fig. 10)
At the right turning point of the hook, the hook point should be 3.6 mm from
the needle (fig. 12).
(preadjustment)