Husqvarna Viking Prelude 340 350 360 370 service manual

this is a comprehensive manual needed for service and adjustment of sewing machine model:

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Service tools.................................................................................................................................4
SETTING INSTRUCTIONS ...........................................................................................................5
1. The play of the hook gear..........................................................................................................6
2. Setting the hook in relation to the feeding eccentric (after feeding). Version 1 - one pin .........7
2. Setting the hook in relation to the feeding eccentric (after feeding). Version 2 - two pins.........8
3. Belt tension, arm/lower shaft belt ..............................................................................................9
4. Belt tension, motor belt..............................................................................................................9
5. The turning movement of the needle in zig-zag ......................................................................10
6. The play of the worm gear.......................................................................................................11
7. Setting the feed dog in relation to the presser foot..................................................................12
8. The position of the zig-zag cam follower in relation to the cam set .........................................13
9. The centre position of the needle in straight stitching .............................................................13
10. Stitch width limitation/lift height .............................................................................................14
11. The gap between the needle and the hook ...........................................................................15
12. The timing of the hook in relation to the needle.....................................................................16
13. Needle height ........................................................................................................................17
14. Setting the stitch plate (the hook cover) in relation to the needle in the feeding direction. ..18
15. The sideways setting of the stitch plate(the hook cover) in relation to the feed dog. ...........18
16. The height of the hook...........................................................................................................19
17. The lifting height of the presser foot and its parallelity to the stitch plate ..............................20
18. Feed dog height ....................................................................................................................21
Buttonhole setting, button type 1
19. The bar tack position of the buttonhole .................................................................................22
20,21 Buttonhole balance, the colums ........................................................................................22
Buttonhole setting, button type 2
20. Course adjustment of the buttonhole ....................................................................................23
19. The bar tack position of the buttonhole .................................................................................23
21. Fine adjustment of the buttonhole ........................................................................................23
Buttonhole setting, button type 3
20. Course adjustment of the buttonhole ....................................................................................24
19. The bar tack position of the buttonhole .................................................................................24
21. Fine adjustment of the buttonhole ........................................................................................24
22. Stitch length balance - pattern stitches .................................................................................25
23. Lower thread tension (thread tension of the bobbin basket) .................................................26
24. Upper thread tension.............................................................................................................27
25. Setting the thread take-up spring ..........................................................................................28
26. Max. speed/smooth-running..................................................................................................29
27. Feed dog lowering.................................................................................................................29
Rear cover ..................................................................................................................................30
Upper rear cover - 300 series......................................................................................................31
Lower rear corner - 300 series ....................................................................................................31
Front cover .................................................................................................................................32
Sewing head...............................................................................................................................33
Circuit board unit .........................................................................................................................34
Pattern mechanism .....................................................................................................................35
The parts of the pattern mechanism............................................................................................36
Feeding unit................................................................................................................................41
Bobbin device.............................................................................................................................42
Hook compl. ...............................................................................................................................43
Tags: 340, 350