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260 Service Instructions 755 A/756 A - 00.0 - 02/2019

Replacing pneumatic cylinder 3

Fig. 256: Replacing pneumatic cylinder 3

To replace pneumatic cylinder 3:

1. Loosen the spring clip (2).

2. Loosen the screw (1) and disassemble the axle.

3. Disassemble the old pneumatic cylinder.

4. Set the new pneumatic cylinder to a dimension of 301 mm.

5. Assemble the new pneumatic cylinder.

6. Connect the pneumatic lines.

(1) - Screw (2) - Spring clip

①②

301(retracted)

Default Chapter3
- Table of Contents3
1 About These Instructions9
- For Whom Are These Instructions Intended9
- Representation Conventions - Symbols and Characters9
- Other Documents11
- Liability11
2 Safety13
- Basic Safety Instructions13
- Signal Words and Symbols Used in Warnings14
3 Working Basis17
- Gages17
- Locking the Machine in Place17
- Swiveling up the Machine Head18
- Swiveling down the Machine Head20
- Setting the Handwheel Scale22
4 Aligning the Machine Head23
5 Disassembling and Assembling the Machine Head27
- Disassembling the Machine Head27
- Assembling Machine Head28
6 Needle Bar30
- Non-Switchable Needle Bar (Class 755)30
- Aligning the Needle Bar with the Throat Plate30
- Setting the Needle Bar Height34
- Changing the Needle Holder36
- Disassembling the Needle Bar Linkage37
- Assembling the Needle Bar Linkage39
- Switchable Needle Bar (Class 756)42
- Aligning the Needle Bars with the Throat Plate42
- Setting the Needle Bar Height45
- Changing the Needle Holder46
- Disassembling the Needle Bar Linkage47
- Assembling the Needle Bar Linkage50
- Disassembling the Needle Bar Linkage56
- Assembling the Needle Bar Linkage60
- Setting the Needle Transport64
7 Hook66
- Changing the Hook66
- Setting the Loop Stroke67
- Setting the Distance between Hook Tips and Needles69
- Setting the Needle Guard71
- Setting the Bobbin Case Lifter73
- Setting the Timing for Opening74
- Setting the Lifting Gap76
8 Setting the Safety Clutch77
- Engaging the Safety Clutch77
- Setting the Torque78
9 Setting the Remaining Thread Monitor79
10 Middle Knife80
- Changing the Drive Motor80
- Disassembling the Drive Motor80
- Assembling the Drive Motor82
- Setting the Middle Knife83
11 Setting the Thread Tension Spring86
12 Setting the Trimming and Clamping Device for the Needle Threads87
- Testing the Function of the Trimming and Clamping Device for the Needle Threads88
- Replacing Knives and Thread-Pulling Knife89
- Setting the Thread-Pulling Knife to a Different Needle Distance92
- Converting the Trimming and Clamping Device93
13 Setting the Trimming and Clamping Device for the Hook Threads94
- Changing the Knives95
- Setting the Height of the Hook Thread Trimmer96
- Testing the Hook Thread Trimmer97
14 Needle Thread Advancing Device98
- Adjusting the Needle Thread Quantity98
- Setting the Movement of the Needle Thread Advancing Device99
15 Changing the Sewing Motor100
16 Setting the Folding Station Plate103
17 Folder105
- Assembling the Folder105
- Aligning the Folder with the Needles106
- Aligning the Folder with the Middle of the Pocket Opening107
- Setting the Guide Plates at the Folder109
- Setting the Stroke Movement for the Folder111
- Setting the Folder Detection115
18 Transport Carriage117
- Setting the Reference Position of the Transport Carriage117
- Setting the Front End Position of the Transport Carriage118
- Changing the Toothed Belt120
- Setting the Toothed Belt Tension122
19 Transport Clamps125
- Setting the Height of the Transport Clamps126
- Changing the Transport Clamps127
- Aligning the Transport Clamps with the Sliding Plate Edge128
- Setting the Distance of the Transport Clamps to the Folder Sole129
- Setting the Distance of the Transport Clamps to the Folder Sole (Manually)130
- Setting the Distance of the Transport Clamps to the Folder Sole (Motorized)132
- Setting the Blowing of the Piping Strips134
- Setting the Transport Clamp Pressure136
- Setting the Transport Clamp Pressure Manually136
- Setting the Programmable Transport Clamp Pressure137
- Changing the Toothed Belt of the Motorized Transport Clamp137
20 Automatic Corner Knife Station (Straight Pocket)139
- Adjusting the Corner Knives Mechanically139
- Setting the Initial Position of the Corner Knives140
- Testing the Initial Position of the Corner Knives Manually141
- Testing and Adjusting the Corner Knives Electrically144
- Aligning the Corner Knife Station with the Seams147
- Setting the Angle of the Corner Knife Incisions148
- Replacing Corner Knives149
21 Automatic Corner Knife Station (Straight/Slanted Pocket)150
- Adjusting the Corner Knives Mechanically150
- Setting the Initial Position of the Corner Knives151
- Setting the Piercers152
- Setting the Corner Knife Inclination153
- Testing the Initial Position of the Corner Knives Manually155
- Testing and Adjusting the Corner Knives Electrically158
- Aligning the Corner Knife Station with the Seams162
- Setting the Angle of the Corner Knife Incisions163
- Replacing Corner Knives164
22 Multi-Functional Corner Knife Station165
- Adjusting the Corner Knives Manually165
- Setting the Initial Position of the Corner Knives166
- Setting the Piercers167
- Setting the Corner Knife Inclination168
- Testing the Initial Position of the Corner Knives Manually169
- Setting the Speed and the End Position Damping of the Corner Knives173
- Setting the Speed173
- Setting the End Position Damping174
- Testing and Adjusting the Corner Knives Electrically175
- Aligning the Corner Knife Station with the Seams180
- Setting the Angle of the Corner Knife Incisions182
- Replacing Corner Knives183
- Changing the Reference Switch on the Corner Knife Support184
23 Marking Lamps185
- Setting the Stationary Marking Lamps186
- Setting the Programmable Marking Lamp Vertical (Optional)187
24 Light Barriers189
- Setting the Light Barrier Holder189
- Aligning the Light Barriers191
- Setting the Correction Values for the Flap198
- Aligning the Air Nozzles for Cleaning the Reflecting Foils198
25 Assembling the Vacuum Unit (Optional)201
26 Endless Zipper Feed (Optional)203
- Threading and Activating the Zipper203
- Setting the Guide Rails at the Folder206
- Setting the Lifting Movement of the Guide Plates207
- Zipper Cutter209
- Changing the Knives209
- Setting the Height of the Zipper Cutter211
- Setting the Position of Knife and Counter Blade212
- Setting the Swivel Width213
- Setting the Swivel Speed of the Zipper Cutter214
- Setting the End Position Damping215
- Driver Zipper217
- Setting the Distance between the Driver Zipper and the Needles217
- Setting the Driver Zipper Limit219
- Setting the Speed of the Driver Zipper220
- Setting the Folder Height When the Zipper Is Cut221
27 Additional Equipment223
- Setting the Outfeed Roller223
- Tape Feeder225
- Assembling the Tape Feeder and Inserting the Reinforcement Strip225
- Setting the Height of the Tape Feeder228
- Changing the Knives229
- Changing the Conveyor Belt231
- Setting the Downholder234
- Assembling the Pocket Bag Clamp237
28 Stacker239
- Pincer Stacker239
- Assembling the Pincer Stacker240
- Setting the Pincer Stacker243
- Activating the Pincer Stacker244
- Throw-Over Stacker245
- Assembling the Throw-Over Stacker245
- Aligning the Throw-Over Stacker250
- Activating the Throw-Over Stacker252
- Setting the Stacking Speed252
- Setting the Stack Removal253
- Setting the Sewing Material Surface254
- Setting the Position of the Stops255
- Setting the Stacker Brackets256
- Replacing Pneumatic Cylinders, Pneumatic Valve and Coupling Rods259
- Setting the Pneumatic Switch265
29 Programming267
30 Maintenance439
- Cleaning440
- Lubricating442
- Lubricating the Machine Head443
- Lubricating the Hook444
- Servicing the Pneumatic System445
- Setting the Operating Pressure445
- Draining the Water Condensation446
- Cleaning the Filter Element447
- Parts List448
31 Decommissioning449
32 Disposal451
33 Troubleshooting453
- Customer Service453
- Messages of the Software453
34 Technical Data471
35 Appendix473
- Wiring Diagram473
- Pneumatic Diagram488

Brand	DURKOPP ADLER
Model	755 A
Category	Sewing Machine
Language	English

DURKOPP ADLER 755 A User Manual

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DURKOPP ADLER 755 A Specifications

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