Valley FABRICATOR 251 Manuals

Manuals and User Guides for Valley FABRICATOR 251. We have 1 Valley FABRICATOR 251 manual available for free PDF download: Service Manual

Valley FABRICATOR 251 Service Manual

Valley FABRICATOR 251 Service Manual (104 pages)

MIG WELDING MACHINE

Brand: Valley | Category: Welding System | Size: 5 MB

Table of Contents

Service Manual
1
Table of Contents
4
Safety Instructions and Warnings

7
- Arc Welding Hazards
  7
- Safety Instructions
  8
- Principal Safety Standards
  10
- Symbol Chart
  11
- Precautions de Securite en Soudage a L'arc
  12
- Dangers Relatifs Au Soudage À L'arc
  12
- Principales Normes de Securite
  15
- Graphique de Symbole
  16
Introduction

17
- How to Use this Manual
  17
- Equipment Identification
  17
- Receipt of Equipment
  17
- General Information
  18
- Safety
  18
- Protective Filter Lenses
  18
- User Responsibility
  18
- Duty Cycle
  19
- Specifications
  19
- Included Items
  21
- Optional Accessories
  21
Installation

23
- Environment
  23
- Location
  23
- Ventilation
  23
- Mains Supply Voltage Requirements
  24
- Alternative Mains Supply Voltages
  24
- Quick Setup
  26
- Installation of Shielding Gas (GMAW) Process
  26
- Attaching the Gun and Cable Assembly to the Power Source
  29
- Input and Output Wire Guide Installation
  31
- Selection and Installation of Feedrolls
  31
- Installing Wire Spool
  32
- Inserting Wire into the Feedhead
  33
- Wirefeeder Drive Roller Pressure Adjustment
  34
- Wire Reel Hub Brake
  34
- Spool Gun Attachment
  35
- Polarity Changeover
  36
Operation

39
Section

55
- Routine Maintenance & Inspection
  55
Maintenance

55
Basic Troubleshooting

57
Advanced Troubleshooting

63
- Preliminary Checks
  63
- Initial Setup Conditions
  64
- Primary Power Test
  64
- Logic and Control Tests
  65
- Spool Gun Control (J1) Test
  66
- Output Voltage Test
  67
- Wire Feed & Weld Test
  68
- Primary Power Problems
  68
- Logic and Control Problems
  69
- Spool Gun Control (J1) Problem
  70
- Output Voltage Problem
  70
- Wire Feed and Weld Problems
  71
- Terminal Block Voltage Test
  71
- SW3 Coarse and SW4 Fine Rotary Switch Test
  72
- MIG Timer PCB (PCB2) Test
  74
- Rectifier Assembly Test
  75
- Main Transformer Test
  76
- Circuit Operation
  
  77
Section 9

81
Appendix 1: Feedroll Kits

91
Appendix 2: Power Supply Circuit Diagram

92
Appendix 3: Main Pcb Circuit Diagram

94
Appendix 4: Spot Timer Circuit Diagram

96
Appendix 5: Spool Gun Pcb

98
Limited Warranty

100
Warranty Schedule

101

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