Pfaff 3811-2/45 Instruction Manual page 40

Note:
.1 Bring the top feed 4 (fig. 4) into its highest position (handwheel).
.2 Lift the presser foot 2 (hand lever 1; fig. 8).
.3 Slide the 5 mm thick adjustment gauge 11 (fig. 6) under the presser foot from the back.
.4 Remove the bearing pin 12 (fig. 7 and 9) (screw 13; fig. 9).
.5 Pivot the connecting joint 14 out of the bracket of the feed driving lever 15.
.6 Push out the eccentric pin 16 (fig. 7) (screw 17).
.7 Loosen screw 7 (fig. 4).
.8 Align the presser foot 2 in accordance with the requirement.
.9 Bring the presser shaft lifter 8 to its bottom resting position.
Note: Take care that the hand lever 1 (fig. 4) is still in its upwards position!
.10 Let the presser foot 2 come to rest on the needle plate 3 (hand lever 1) (fig. 4) and loosen
screw 18 (fig. 8).
.11 Pivot the connecting joint 14 (fig. 8) into the bracket of the feed driving lever 15.
.12 Mount the bearing pin 12 (fig. 9) (screw 13).
Note: Pay attention to the ease of movement. If necessary, align the feed driving
lever 15 (fig. 7).
.13 13 Using the handwheel, bring the needle bar to a position 0.8 mm below its t.d.c.
(= adjustment hole "4"; fig. 5) and lock it into this position with the cylindrical pin.
.14 Position the top feed foot 4 (fig. 4) in the middle of the presser foot cutout in the sewing direction and
tighten screw 18.
.15 Remove the cylindrical pin from the bearing disc.
.16 Loosen screw 19 (fig. 8).
.17 Connect the connection lever 20 and the connecting rod 21 (eccentric pin 16).
.18 Set the eccentric pin 16 in such a way that the largest eccentricity is pointing downwards;
tighten screw 19.
.19 Press the connection lever 20 in the feed direction until it touches the eccentric pin 16.
Tighten screw 19.
.20 Laterally align the top feed foot 4 in such a way that it does not touch the presser foot 2
(srew 21; fig. 9).
40
The presser foot 2 (fig. 4) should be positioned in such a way that:
- the needle enters the middle of the needle hole in the presser foot
- the edge of the presser foot is parallel to the needle plate cutout of the
bottom feed dog.
All of the moving parts of the top feed drive must function easily and without play
(oil regularly!).
Bi21-01