Pfaff 937 Instruction Manual page 5

Contents ............................................................................... Chapter - Page
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.05.17 Zeroing the vibrating presser ................................................................................... 11 - 19
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.05.18 Torsion spring of the reverse feed lever .................................................................. 11 - 20
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.05.19 Torsion spring of the differentiation regulating shaft ............................................... 11 - 21
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.05.20 Feeding motion of the bottom feed dog .................................................................. 11 - 22
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.05.21 Lifting motion of the bottom feed dog..................................................................... 11 - 23
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.05.22 Drive belt in the gearbox housing ............................................................................ 11 - 24
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.05.23 Hook bearing bracket ............................................................................................... 11 - 25
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.05.24 Hook lubrication ....................................................................................................... 11 - 26
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.05.25 Pre-adjusting the needle height ............................................................................... 11 - 27
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.05.26 Needle rise, hook-to-needle clearance and bobbin case positioning-finger ............. 11 - 28
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.05.27 Final adjustment of the needle height ..................................................................... 11 - 29
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.05.28 Bobbin case opener position ................................................................................... 11 - 30
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.05.29 Bobbin case opener motion ..................................................................................... 11 - 31
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.05.30 Bottom-feed dog height ........................................................................................... 11 - 32
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.05.31 Clearance between presser foot and needle plate .................................................. 11 - 33
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.05.32 Vibrating-presser feed and connecting lever ........................................................... 11 - 35
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.05.33 Vibrating-presser stroke ........................................................................................... 11 - 37
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.05.34 Vibrating-presser lifting motion ................................................................................ 11 - 38
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.05.35 Vibrating-presser feeding motion ............................................................................. 11 - 39
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.05.36 Feeding motion difference ....................................................................................... 11 - 40
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.05.37 Vibrating presser and presser foot pressure ............................................................ 11 - 41
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.05.38 Thread diverter pin ................................................................................................... 11 - 42
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.05.39 Needle-thread tension release (machines without -900/..) ...................................... 11 - 43
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.05.40 Limiting the knee lever stroke ................................................................................. 11 - 44
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.05.41 Knee lever play ........................................................................................................ 11 - 45
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.05.42 Bobbin winder .......................................................................................................... 11 - 46
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.06 Adjusting the thread trimmer -900/51 .................................................................. 11 - 47
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.06.01 Pre-adjusting the control cam .................................................................................. 11 - 47
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.0 .02 Roller lever ............................................................................................................... 11 - 48
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.06.03 Pawl ......................................................................................................................... 11 - 49
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.06.04 Engaging solenoid .................................................................................................... 11 - 50
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.06.05 Release lever ........................................................................................................... 11 - 51
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.06.06 Engaging lever ......................................................................................................... 11 - 52
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.06.07 Thread catcher position and cutting test ................................................................. 11 - 53
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.06.08 Control cam (final adjustment) and retaining spring ................................................. 11 - 54
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.06.09 Needle-thread tension release ................................................................................. 11 - 55
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.06.10 Removing and refitting the control unit ................................................................... 11 - 57
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.06.11 Synchronizer ............................................................................................................ 11 - 58
Index