Lincoln Electric LF-74 Manuals

Manuals and User Guides for Lincoln Electric LF-74. We have 4 Lincoln Electric LF-74 manuals available for free PDF download: Service Manual, Operator's Manual, Technical Specifications

Lincoln Electric LF-74 Service Manual (119 pages)

Lincoln Electric Welder User Manual

Brand: Lincoln Electric | Category: Welding System | Size: 6.38 MB

Table of Contents

7
- Service Manual
  1
- California Proposition 65 Warnings
  2
- Electric Shock Can Kill
  3
- Installation
  8
  - Technical Specifications
    8
  - Safety Precautions
    9
    
    Location
    9
    
    Mounting
    9
    
    Bench Mount
    10
    
    Swivel Mount
    10
    
    Boom Mount
    10
    
    Suspended
    10
    
    Weld Cable Sizes
    11
    
    Coaxial Weld Cables
    12
    
    Weld Cable Connections
    12
  - Analog Control Cable Connections
    13
    
    Welding Gun/Wire Feeder Trigger Connector
    15
    
    High Frequency Protection
    15
    
    Remote Sense Lead Specifications
    15
  - Wire Drive Systems
    15
  - Welding Guns, Torches and Accesories
    16
  - Procedure for Changing Drive and Idle Roll Sets
    17
    
    Wire Drive Configuration
    17
    
    Pressure Arm Adjustment
    18
    
    Wire Reel Loading
    19
    
    Weld Wire Routing
    20
  - Installing Electrode Conduit Kits
    22
  - Aluminum Wire Preperations
    23
  - Typical System Configurations
    25
Operation Section

27
- Operation
  28
  - Safety Precautions
    28
  - Graphic Symbols
    28
  - Common Welding Abbreviations
    29
  - Product Description
    29
  - Front Panel Controls and Connections
    30
    
    Remote Voltage Control Kit (Optional
    31
    
    Burnback and Postflow Timer Kit (Optional
    31
    
    Thermal LED, Motor Overload
    31
    
    Cold Feed/Gas Purge Switch
    31
    
    5. 2 Step - Trigger Interlock Switch
    31
    
    Wire Feed Speed Knob
    32
    
    Gun Receiver Bushing
    32
    
    Trigger Connector 5-Pin Amphenol
    32
Maintenance

43
- Installation
  44
- Safety Precautions
  45
  - Location
    45
  - Mounting
    45
  - Bench Mount
    46
  - Swivel Mount
    46
  - Boom Mount
    46
  - Suspended
    46
  - Weld Cable Sizes
    47
  - Coaxial Weld Cables
    48
  - Weld Cable Connections
    48
  - Welding Gun/Wire Feeder Trigger Connector
    51
  - High Frequency Protection
    51
  - Remote Sense Lead Specifications
    51
- Wire Drive Systems
  51
- Welding Guns, Torches and Accessories
  52
- Wire Drive Configuration
  53
- Assembly of Drive Rolls and Wire Guides
  54
- Pressure Arm Adjustment
  55
- Shielding Gas Connection
  56
  - Wire Reel Loading
    57
  - Weld Wire Routing
    58
- Installing Electrode Conduit Kits
  59
- Aluminum Wire Preparations
  60
- Common Equipment Set-Ups
  62
Table of Contents

65
- Common Welding Abbreviations
  66
- Operation
  66
- Safety Precautions
  66
- Product Description
  67
- Front Panel Controls and Connections
  68
  - Wire Feed Speed Knob
    69
  - Remote Voltage Control Kit (Optional
    69
  - Burnback and Postflow Timer Kit (Optional
    69
  - Thermal LED, Motor Overload
    69
  - Cold Feed/Gas Purge Switch
    69
  - Step - Trigger Interlock Switch
    70
  - Gun Receiver Bushing
    70
  - Trigger Connector 5-Pin Amphenol
    70
    
    Theory of Operation
    82
    
    General Description
    82
    
    Control Board
    83
Table of Contents

85
- How to Use Troubleshooting Guide
  86
- Troubleshooting Guide
  86
  - Pc Board Troubleshooting Procedures
    87
  - Drive Motor and Tach Feedback Test
    91
  - Gas Solenoid Test
    93
  - Diode Bridge Test
    95
  - Wire Speed Potentiometer Test
    97
  - PC Board Removal and Replacement
    99
    
    Wire Drive Motor and Gear Box
    101
    
    Troubleshooting and Repair
    102
  - Wire Drive Motor and Gear Box Removal and Replacement
    102
  - Retest after Repair
    105
Table of Contents

107

Lincoln Electric LF-74 Operator's Manual (60 pages)

Brand: Lincoln Electric | Category: Wire Feeders | Size: 7.08 MB

Table of Contents
6
Installation
9
Technical Specifications
9
Safety Precautions
10
Location
10
Mounting
10
Bench Mount
11
Swivel Mount
11
Boom Mount
11
Suspended
11
Weld Cable Sizes
12
Coaxial Weld Cables
13
Weld Cable Connections
13
Analog Miller Control Cable Adapter
15
Welding Gun/Wire Feeder Trigger Connector
16
High Frequency Protection
16
Remote Sense Lead Specifications
16
Wire Drive Systems
16
Welding Guns, Torches and Accessories
17
Wire Drive Configuration
18
Assembly of Drive Rolls and Wire Guides
19
Pressure Arm Adjustment
20
Shielding Gas Connection
21
Wire Reel Loading
22
Weld Wire Routing
23
Installing Electrode Conduit Kits
24
Aluminum Wire Preparations
25
Common Equipment Set-Ups
27
High Volume Production
28
Portable Welding
29
Operation
30
Safety Precautions
30
Graphic Symbols
30
Common Welding Abbreviations
30
Product Description
31
Front Panel Controls and Connections
32
Wire Feed Speed Knob
33
Remote Voltage Control Kit (Optional
33
Burnback and Postflow Timer Kit (Optional
33
Thermal LED, Motor Overload
33
Cold Feed/Gas Purge Switch
33
6. 2 Step - Trigger Interlock Switch
34
Gun Receiver Bushing
34
Trigger Connector 5-Pin Amphenol
34
Accessories
35
Maintenance
39
Safety Precautions
39
Routine
39
Periodic
39
Calibration Specification
39
Troubleshooting
41
How to Use Troubleshooting Guide
41
Troubleshooting
42

Lincoln Electric LF-74 Operator's Manual (50 pages)

WIRE FEEDER

Brand: Lincoln Electric | Category: Welding System | Size: 3.59 MB

Table of Contents
7
Installation
9
- Technical Specifications
  9
- Safety Precautions
  10
  - Location
    10
  - Mounting
    10
  - Bench Mount
    11
  - Swivel Mount
    11
  - Boom Mount
    11
  - Suspended
    11
  - Weld Cable Sizes
    12
  - Coaxial Weld Cables
    13
  - Weld Cable Connections
    13
- Analog Control Cable
  14
- Analog Miller Control Cable Adapter
  15
- Wire Drive Systems
  16
- Welding Guns, Torches and Accessories
  17
- Wire Drive Configuration
  18
- Assembly of Drive Rolls and Wire Guides
  19
- Pressure Arm Adjustment
  20
- Shielding Gas Connection
  21
  - Wire Reel Loading
    22
  - Weld Wire Routing
    23
- Installing Electrode Conduit Kits
  24
- Aluminum Wire Preparations
  25
- Common Equipment Set-Ups
  27
- High Volume Production
  28
- Portable Welding
  29
Operation
30
- Safety Precautions
  30
- Graphic Symbols
  30
- Common Welding Abbreviations
  30
- Product Description
  31
- Front Panel Controls and Connections
  32
Accessories
35
Maintenance
39
- Safety Precautions
  39
- Routine
  39
- Periodic
  39
- Calibration Specification
  39
Troubleshooting
41
- How to Use Troubleshooting Guide
  41
- Troubleshooting
  42

Lincoln Electric LF-74 Technical Specifications (8 pages)

2-Roll or 4-Roll Heavy Duty Industrial Wire Feeders

Brand: Lincoln Electric | Category: Welding Accessories | Size: 0.61 MB

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