Pfaff 3801-3/07

Adjustment
13 - 21
13.05.18 Looper height and looper angle (for the 3801-3/07)
Requirements
When the looper carrier 2 is vertical
1. there must be a clearance of 0.7 mm between the highest point of the back of the
looper and the needle plate support surface, and
2. looper 7 must touch adjustment gauge 9.
Fig. 13 - 18
0,7 mm
8
6
8
2
4
3
5
1
8
9
7
Spacer Part No. Spacer Part No.
0,3 mm 91-170 693-05 0,8 mm 91-169 615-05
0,5 mm 91-169 614-05 1,2 mm 91-170 694-05
● Remove needle plate and bottom feed dog.
● Lay the adjustment gauge (Part No. 61-111 642-19) onto the needle plate support.
● Position the looper carrier 2 vertically.
● Turn eccentric bearing pin 3 (screws 4 and 5) according to requirement 1.
● Check adjustment.
● If the required clearance is not achieved, replace the spacer 6. To do this, looper 7
(screw 8) must be dismounted.
● Lay looper adjustment gauge 9 (Part No. 61-111 643-06) on the left edge of the cover plate
groove (see arrow) and slide against looper 7.
● Position looper 7 (screw 8) so that it touches looper adjustment gauge 9 (requirement 2).