Table of Contents
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Table of Contents
1
1.1
1.2
1.3
1.4
2
2.1
2.2
3
3.1
3.2
3.3
3.3.1 Access to the underside of the machine..................................... 14
3.3.2 Disassembling and assembling the arm cover ........................... 15
3.3.3 Disassembling and assembling the head cover ......................... 16
3.3.4 Disassembling and assembling the valve cover ......................... 17
3.3.5 Opening and closing the throat plate slide ................................. 18
3.3.6 Disassembling and assembling the throat plate ......................... 19
3.3.7 Disassembling and assembling the feed dog ............................. 20
3.4
3.5
3.6
4
5
6
6.1
6.2
7
7.1
7.2
7.3
8
8.1
8.2
9
9.1
9.1.1 Moving the feed dog on the feed dog carrier .............................. 38
9.1.2 Moving the feed dog carrier ........................................................ 39
9.2
9.2.1 Adjusting the feed movement ..................................................... 40
9.2.2 Adjusting the feed dog height at top dead center ....................... 41
9.2.3 Adjusting the stroke movement .................................................. 42
9.2.4 Adjusting the compensating weight ............................................ 43
Service Instructions 827/827-M - 01.0 - 05/2019
About these instructions ........................................................... 5
For whom are these instructions intended?.................................. 5
Representation conventions - symbols and characters ............... 5
Other documents .......................................................................... 7
Liability.......................................................................................... 7
Safety ........................................................................................... 9
Basic safety instructions ............................................................... 9
Signal words and symbols used in warnings .............................. 10
Working basis ........................................................................... 13
Order of the adjustments ............................................................ 13
Laying the cables........................................................................ 13
Removing the covers .................................................................. 14
Flats on shafts ............................................................................ 21
Locking the machine in place ..................................................... 22
Adjusting the handwheel into position ........................................ 23
Adjusting the handwheel scale ............................................... 25
Positioning the arm shaft......................................................... 26
Positioning the toothed belt wheels ....................................... 27
Positioning the upper toothed belt wheel.................................... 27
Positioning the lower toothed belt wheel .................................... 28
Stitch length adjusting wheel .................................................. 30
Adjusting the stitch length adjusting wheel ................................. 30
Adjusting the stitch length limit ................................................... 32
Needle bar linkage .................................................................... 35
Aligning the needle bar linkage sideways................................... 35
Aligning the needle bar linkage in the sewing direction .............. 37
Adjusting the feed dog............................................................. 38
Adjusting the feed dog position .................................................. 38
Adjusting the feed dog movement .............................................. 40
1
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- Position of the Hook and Needle
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