Index Page:
Service Instructions Class 767
1. General notes
1.1 Gauge kit................................................... 3
2. Position of the low er toothed belt w heel .............................. 4
3. Zero position, feed with equipment
3.1 Zero position adjustment (position of the stitch regulator link) ................... 5
3.2 Bottomfeedadjustment.......................................... 6
3.2.1 Position of the feed-dog in the throat plate cutout .......................... 6
3.2.2 Height of the feed-dog ........................................... 7
3.2.3 Lifting motion of the feed-dog ...................................... 8
3.2.4 Feeding motion of the feed-dog ..................................... 9
3.2.5 Synchronous run of needle feed and bottom feed .......................... 10
3.3 Needle bar wing .............................................. 13
3.3.1 Lateral position of the needle bar wing ................................. 13
3.3.2 Position of the needle bar wing in feed direction ........................... 14
4. Hook settings
4.1 Looping stroke ............................................... 15
4.2 Needle bar height ............................................. 16
4.3 Distance between hook and needle ................................... 17
4.4 Hookprotection............................................... 18
4.5 Clearanceintheclawclutch....................................... 19
5. Stitch regulator settings
5.1 Limitation of maximum stitch length ................................... 20
5. 2 Limitation of the max. stitch length for machines equipped with 2nd stitch length as standard . . 21
5 .3 Basic settings of stitch adjustments for machines equipped with 2nd stitch length as standard . . . 21
5. 4 Operating the stitch adjustments for machines equipped with 2nd stitch length as standard . . . 2 3
6. Bobbin case opening settings
6.1 Bobbin case opening............................................ 24
6.1.1 Size of the finger run............................................ 24
6.1.2 Liftingcourse................................................ 25
6.1.3 Timing o f the bobbin case opening ................................... 25
7. Upper feed settings
7.1 Altering the upper feed .......................................... 26
7.1.1 Lateral position of the lever for transmitting the setting wheel motion............... 26
7.1.2 Setting range of the s ewing foot stroke adjustment .......................... 27
7.1.3 Position of the lever for transmitting the setting wheel motion ................... 28
7.2 Feeding foot and presser foot ...................................... 29
7.2.1 Feeding foot and presser foot stroke .................................. 29
7.2.2 Lifting motion of the feeding foot..................................... 30
7.3 Potentiometer for automatic speed limitation ............................. 31
8. Sew ing foot height and sew ing foot lift settings
8.1 Electropneumatic sewing foot lift .................................... 34
8.2 Sewingfootlocking ............................................ 37
8.3 LiftLimitation................................................ 38
9. Thread tension lift
9.1 Thread tension opening .......................................... 39
9.2 Threadtensionlift ............................................. 40
10. Safety clutch
10.1 Engage disengaged safety clutch .................................... 41
10.2 Adjusttransmittabletorque........................................ 42
GB
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