Adjustment
13 - 22
Fig. 13 - 19
0,3 mm
7
5
7
1
3
2
4
7
8
9
6
13.05.19 Looper height and looper angle (for the 3801-3/071 and -11/071)
Requirements
When the looper carrier 1 is vertical
1. there must be a clearance of 0.3 mm between the highest point of the back of the
looper and the bottom of the thread trapper 9, and
2. looper 6 must touch looper adjustment gauge 8.
● Position looper carrier 1 so that it is vertical.
● Disassemble needle plate and bottom feed dog.
● Turn eccentric bearing pin 2 (screws 3 and 4) according to requirement 1.
● Check adjustment.
● If the required clearance is not achieved, replace the spacer 5. To do this, looper 6
(screw 7) must be dismounted.
● Lay looper adjustment gauge 8 (Part No. 61-111 643-06) on the left edge of the cover plate
groove (see arrow) and slide against looper 6.
● Position looper 6 (screw 7) so that it touches looper adjustment gauge 8 (requirement 2).
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
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