Hobart Welders M-25 User Manual

Name: Hobart Welders M-25
Brand: Hobart Welders
Rating: 5 (1 reviews)

56 pages

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Includes Installation Instructions For

Optional Spoolmate Spoolgun Switch

IronMan 250

And M-25 Gun

Processes

OM-192 440U 2005−11

Gas Metal Arc (MIG) Welding

Flux Cored Arc (FCAW)

Welding

Description

Arc Welding Power Source and Wire

Feeder

™

File: MIG (GMAW)

Table of Contents3
Section 1 − Safety Precautions - Read before Using5
Symbol Usage5
Arc Welding Hazards5
Additional Symbols for Installation, Operation, and Maintenance7
California Proposition 65 Warnings7
Principal Safety Standards8
EMF Information8
Section 2 − Consignes de Sécurité − Lire Avant Utilisation9
Symboles Utilisés9
Dangers Relatifs au Soudage à L'arc9
Dangers Supplémentaires en Relation Avec L'installation, le Fonctionnement et la Maintenance11
Proposition Californienne 65 Avertissements11
Principales Normes de Sécurité12
Information EMF12
Section 3 − Introduction13
Specifications13
Welding Power Source Duty Cycle and Overheating13
Welding Gun Duty Cycle and Overheating14
Volt-Ampere Curves14
Installing Welding Gun15
Connecting to Weld Output Terminals16
Installing Work Clamp16
Setting Gun Polarity for Wire Type17
Installing Wire Spool and Adjusting Hub Tension17
Installing Gas Supply18
Positioning Jumper Links19
Electrical Service Guide20
Selecting a Location and Connecting Input Power21
Threading Welding Wire22
Installing Optional Spool Gun Switch in Welding Power Source23
Connecting Spool Gun to Welding Power Source24
Section 4 − Operation25
Controls25
Weld Parameters26
Section 5 − Maintenance and Troubleshooting28
Routine Maintenance28
Supplementary Protectors28
Replacing Drive Roll and Wire Inlet Guide29
Removing Knob from Front Panel29
Replacing Gun Contact Tip30
Cleaning or Replacing Gun Liner31
Replacing Switch And/Or Head Tube32
Welding Troubleshooting Table33
Wire Drive/Gun Troubleshooting Table33
Section 6 − Mig Welding (Gmaw) Guidelines34
Typical MIG Process Connections34
Typical MIG Process Control Settings35
Holding and Positioning Welding Gun36
Conditions that Affect Weld Bead Shape37
Gun Movement During Welding38
Poor Weld Bead Characteristics38
Good Weld Bead Characteristics38
Troubleshooting − Excessive Spatter39
Troubleshooting − Porosity39
Troubleshooting − Excessive Penetration39
Troubleshooting − Lack of Penetration40
Troubleshooting − Incomplete Fusion40
Troubleshooting − Burn-Through40
Troubleshooting − Waviness of Bead41
Troubleshooting − Distortion41
Common MIG Shielding Gases42
Troubleshooting Guide for Semiautomatic Welding Equipment42
Section 7 − Electrical Diagram45
Section 8 − Parts List46

Questions and Answers:

A
Amy DavisJul 29, 2025
What to do if CB2 opens and weld output stops on my Hobart Welders M-25?
- G
  George HernandezJul 29, 2025
  If CB2 opens and the weld output stops, inspect the gun switch and trigger leads to identify and fix any issues. Then, press the reset button on the supplementary protector and ensure the door is closed.