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Contents

Contents ............................................................................... Chapter - Page
9
Preparation ............................................................................................................... 9 - 1
9
.01
Inserting the needle ................................................................................................... 9 - 1
9
.02
Winding the bobbin thread, adjusting the thread tension ........................................... 9 - 2
9
.03
Removing / Inserting the bobbin case ........................................................................ 9 - 3
9
.04
9
.05
9
.06
Setting the stitch length / fullness .............................................................................. 9 - 6
9
.06.01
Entering the standard stitch length / fullness ............................................................. 9 - 6
9
.06.02
Entering a second stitch length / fullness ................................................................... 9 - 6
9
.06.03
Entering the fullness range for pedal adjustment ....................................................... 9 - 7
9
.07
Entering / adjusting the code number. ....................................................................... 9 - 8
10
Sewing .................................................................................................................... 10 - 1
10
.01
Applying fullness ...................................................................................................... 10 - 1
11
Care and maintenance ........................................................................................... 11 - 1
11
.01
Cleaning ................................................................................................................... 11 - 1
11
.02
Lubricating the hook ................................................................................................. 11 - 2
11
.03
Filling the oil reservoir .............................................................................................. 11 - 2
11
.04
Lubricating the bevel gears ...................................................................................... 11 - 3
12
Adjustment ............................................................................................................. 12 - 1
12
.01
Notes on adjusting ................................................................................................... 12 - 1
12
.02
Tools, gauges and other accessories for adjusting ................................................... 12 - 1
12
.03
Abbreviations ........................................................................................................... 12 - 1
12
.04
Adjusting the basic machine ................................................................................. 12 - 2
12
.04.01
Adjusting the synchronizer ....................................................................................... 12 - 2
12
.04.02
Positioning the needle in the direction of sewing ..................................................... 12 - 3
12
.04.03
Positioning the needle across the direction of sewing ............................................. 12 - 4
12
.04.04
Preadjusting the needle height ................................................................................. 12 - 5
12
.04.05
12
.04.06
Bobbin case opener height ....................................................................................... 12 - 8
12
.04.07
Bobbin case opener stroke ...................................................................................... 12 - 9
12
.04.08
Feed wheel height ................................................................................................... 12 - 10
12
.04.09
12
.04.10
Roller presser ( 3734-2/01 ) ...................................................................................... 12 -12
12
.04.11
Band feed ( 3734-2/21) ............................................................................................. 12 - 13
12
.04.12
Changing the band ( 3734-4/21)................................................................................ 12 - 14
12
.04.13
Automatic presser-foot lifter .................................................................................... 12 - 15
12
.04.14
Retainer ................................................................................................................... 12 - 16
12
.04.15
Tension release ........................................................................................................ 12 -17
12
.04.16
Thread check spring ................................................................................................. 12 - 18
12
.04.17
Bobbin winder .......................................................................................................... 12 - 19
12
.04.18
Roller presser pressure ............................................................................................ 12 - 20
12
.04.19
Locking the set-value transmitter ............................................................................. 12 - 21

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3734-2/21

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