Index Page
Service Instructions for the Class 887
(Edition 09.2015)
1 General
1.1 Setting gauges ................................................ 5
1.2 Adjusting the handwheel .......................................... 6
1.2.1 Sewingmachinewithminimotor...................................... 6
1.2.2 Sewingmachinewithdirectdrive..................................... 7
2 Bottom feed
2.1 Basic setting for stitch adjustment and stitch length limit ....................... 8
2.2 Stitchuniformityforforwardsandreversestitching.......................... 9
2.3 Adjustingoffeedshaftpositionandclutchleverposition ...................... 10
2.4 Position of the eccentric tappet for the feed movement ........................ 11
2.5 Switchingoverthefeedclutch ...................................... 12
2.6 Position of the eccentric tappet for the switch over of the feed clutch ............... 13
2.7 Checkingtheswitchoverofthefeedclutch .............................. 14
2.8 Adjusting the reduced stitch length .................................... 15
2.9 Throatplate.................................................. 16
2.10 Slide wheel feeder .............................................. 17
2.10.1 Adjusting the wheel feeder height for single needle sewing machines ............... 17
2.10.2 Adjusting the wheel feeder height for double needle sewing machines
and sewing machines with edge trimmer ................................ 18
3 Top feed
3.1 Position of the needle holder with single needle sewing machines ................. 19
3.2 Needle feed .................................................. 20
3.3 Rollerfoot................................................... 22
3.4 Rollerfootlifting............................................... 23
3.5 Fabric holder for double needle sewing machines ........................... 24
4 Adjusting the needle bar and the hook
4.1 Needle bar height, play of needle to hook tip, loop stroke ...................... 25
4.2 Hook tip guard ................................................ 26
4.3 Bobbin housing release ........................................... 27
4.4 Hooklubrication ............................................... 28
5 Thread setting
5.1 Thread regulator, check spring, bolt for the thread lever mechanism................ 29
5.2 Bobbin winder................................................. 30
6 Thread cutter
6.1 General .................................................... 31
6.2 Position of the thread-pulling knife, position of the counter knife .................. 31
6.3 Starting position for the thread pulling knife............................... 32
6.4 Controlcam.................................................. 33