DURKOPP ADLER 755 A

Table of Contents
Service Instructions 755 A/756 A - 00.0 - 02/2019 1
1 About these instructions ........................................................... 7
1.1 For whom are these instructions intended?.................................. 7
1.2 Representation conventions – symbols and characters ............... 7
1.3 Other documents .......................................................................... 9
1.4 Liability.......................................................................................... 9
2 Safety......................................................................................... 11
2.1 Basic safety instructions ............................................................. 11
2.2 Signal words and symbols used in warnings.............................. 12
3 Working basis ........................................................................... 15
3.1 Gages ......................................................................................... 15
3.2 Locking the machine in place ..................................................... 15
3.3 Swiveling up the machine head.................................................. 16
3.4 Swiveling down the machine head ............................................. 18
3.5 Setting the handwheel scale....................................................... 20
4 Aligning the machine head...................................................... 21
5 Disassembling and assembling the machine head............... 25
5.1 Disassembling the machine head............................................... 25
5.2 Assembling machine head ......................................................... 26
6 Needle bar ................................................................................. 28
6.1 Non-switchable needle bar (class 755)....................................... 28
6.1.1 Aligning the needle bar with the throat plate .............................. 28
6.1.2 Setting the needle bar height...................................................... 32
6.1.3 Changing the needle holder ....................................................... 34
6.1.4 Disassembling the needle bar linkage........................................ 35
6.1.5 Assembling the needle bar linkage............................................. 37
6.2 Switchable needle bar (class 756).............................................. 40
6.2.1 Aligning the needle bars with the throat plate............................. 40
6.2.2 Setting the needle bar height...................................................... 43
6.2.3 Changing the needle holder ....................................................... 44
6.2.4 Disassembling the needle bar linkage........................................ 45
6.2.5 Assembling the needle bar linkage............................................. 48
6.2.6 Disassembling the needle bar linkage........................................ 54
6.2.7 Assembling the needle bar linkage............................................. 58
6.3 Setting the needle transport ....................................................... 62
7 Hook........................................................................................... 64
7.1 Changing the hook ..................................................................... 64
7.2 Setting the loop stroke................................................................ 65
7.3 Setting the distance between hook tips and needles ................. 67
7.4 Setting the needle guard ............................................................ 69
7.5 Setting the bobbin case lifter ...................................................... 71
7.5.1 Setting the timing for opening..................................................... 72
7.5.2 Setting the lifting gap .................................................................. 74
8 Setting the safety clutch .......................................................... 75
8.1 Engaging the safety clutch ......................................................... 75
8.2 Setting the torque ....................................................................... 76