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FABRICATOR 251
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 (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
Power Supply Controls, Indicators and Features
39
Weld Mode Selector
44
Amp Air-Cooled MIG Gun
46
Installing a New Wire Conduit
47
MIG Gun Maintenance
48
Basic Welding Technique
48
Stitch Welding Operation
50
Spot Welding Operation
50
Gas Selection for Gas Metal Arc Welding
51
Welding Setting Selection Guide
52
Section
55
Routine Maintenance & Inspection
55
Maintenance
55
Basic Troubleshooting
57
Solving Problems Beyond the Welding Terminals
58
Welding Problems
60
Power Supply Problems
62
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
Circuit Operation of the Control PCB 7977964
77
Circuit Operation of the Digital Volt/Amp PCB 704883
78
Circuit Operation of the Spool Gun PCB 7978034
79
Section 9
81
Parts List
81
Equipment Identification
81
How to Use this Parts List
81
External Replacement Parts
82
Internal Replacement Parts (1)
84
Major Electrical and Mechanical Replacement Parts
86
Internal Replacement Parts (2)
87
Internal Replacement Parts-Spool Assembly
88
Internal Replacement Parts-Wire Feeder
89
Wire Feeder Replacement Parts
90
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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