Firepower MST 140i Operating Manual
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Firepower MST 140i Operating Manual

3-in-1 multi process welding systems
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Firepower MST 140i
3-IN-1 Multi Process
Welding Systems
Operating
Manual
Canadien Français
Americas Español
English
Revision: AA
Issue Date: March 12, 2014
www.firepower.com
Art# A-12514
Manual No.: 0-5338

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  • Page 1 Firepower MST 140i 3-IN-1 Multi Process Welding Systems Operating Manual English Canadien Français Americas Español Art# A-12514 Revision: AA Issue Date: March 12, 2014 Manual No.: 0-5338 www.firepower.com...
  • Page 2 WE APPRECIATE YOUR BUSINESS! Congratulations on receiving your new Firepower product. We are proud to have you as our customer and will strive to provide you with the best service and support in the industry. This product is backed by our extensive warranty and world-wide service network.
  • Page 3 While the information contained in this Manual represents the Manufacturer’s best judgment, the Manufacturer assumes no liability for its use. Operating Manual Number 0-5338 for: Firepower MST 140i Portable system Package Part Number: 1444-0870 Published by: Victor Technologies, Inc.

  • Page 4: Table Of Contents

    Description ..................... 2-1 2.05 Transportation Methods .................. 2-1 2.06 User Responsibility ..................2-1 2.07 Firepower MST 140i Portable System Package (Part No. 1444-0870) .... 2-2 2.08 Duty Cycle ....................... 2-2 2.09 Specifications ....................2-3 2.10 Options and Accessories ................2-4 SECTION 3: INSTALLATION, OPERATION AND SETUP ..........
  • Page 5 Firepower 140A MIG Gun Parts ..............6-1 6.02 Power Source ....................6-2 6.03 Hardware List ....................6-4 APPENDIX ....................A-1 APPENDIX: FIREPOWER MST 140I CIRCUIT DIAGRAM ..........A-2 FIREPOWER - LIMITED WARRANTY TERMS ........INSIDE REAR COVER GLOBAL CUSTOMER SERVICE CONTACT INFORMATION ......... REAR COVER...
  • Page 6 This Page Intentionally Blank...

  • Page 7: Section 1: Safety Instructions And Warnings

    Firepower MST 140i SECTION 1: SAFETY INSTRUCTIONS AND WARNINGS WARNING PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS KEEP AWAY UNTIL CONSULTING YOUR DOCTOR. DO NOT LOSE THESE INSTRUCTIONS. READ OPERATING/ INSTRUCTION MANUAL BEFORE INSTALLING, OPERATING OR SERVICING THIS EQUIPMENT.
  • Page 8 Firepower MST 140i 1. Wear a welding helmet fitted with a proper shade of filter 1. Keep your head out of the fumes. Do not breathe the fumes. (see ANSI Z49.1 listed in Safety Standards) to protect your face and eyes when welding or watching.
  • Page 9 Firepower MST 140i from the weld area, the area is well ventilated, and if necessary, while wearing an air-supplied respirator. The WARNING coatings and any metals containing these elements can give off toxic fumes if welded. CYLINDERS can explode if damaged.
  • Page 10 Firepower MST 140i 2. Do not add fuel while smoking or if unit is near any sparks or open flames. WARNING 3. Allow engine to cool before fueling. If possible, check and add fuel to cold engine before beginning job.

  • Page 11: General Safety Information For Victor Cs Regulator

    Firepower MST 140i WARNING ABOUT PACEMAKERS: Ade quately ventilate welding, heating, and cutting The above procedures are among those also work areas to prevent accumulation of explosive normally recommended for pacemaker wearers. or toxic concen trations of gases. Certain combina- Consult your doctor for complete information.

  • Page 12: Principal Safety Standards

    Firepower MST 140i 1.03 Principal Safety Standards Safety in Welding and Cutting, ANSI Standard Z49.1, from WARNING American Welding Society, 550 N.W. LeJeune Rd., Miami, Cylinders are highly pressurized. Handle with FL 33126. care. Serious accidents can result from improper...

  • Page 13: Symbol Chart

    Firepower MST 140i 1.04 Symbol Chart Note that only some of these symbols will appear on your model. Wire Feed Function Single Phase Wire Feed Towards Workpiece With Three Phase Output Voltage Off. Three Phase Static Frequency Converter- Welding Gun...

  • Page 14: Precautions De Securite En Soudage A L'arc

    Firepower MST 140i 1.05 Precautions De Securite En Soudage A L’arc MISE EN GARDE LE SOUDAGE A L’ARC EST DANGEREUX PROTEGEZ-VOUS, AINSI QUE LES AUTRES, CONTRE LES BLESSURES GRAVES POSSIBLES OU LA MORT. NE LAISSEZ PAS LES ENFANTS S’APPROCHER, NI LES PORTEURS DE STIMULATEUR CARDIAQUE (A MOINS QU’ILS N’AIENT CONSULTE UN MEDECIN).
  • Page 15 Firepower MST 140i 3. Entourez l’aire de soudage de rideaux ou de cloisons pour protéger les autres des coups d’arc ou de l’éblouissement; avertissez les observateurs de ne pas regarder l’arc. AVERTISSEMENT 4. Portez des vêtements en matériaux ignifuges et durables LE RAYONNEMENT DE L’ARC PEUT BRÛLER LES...
  • Page 16 Firepower MST 140i 3. Si la ventilation est inadequate, portez un respirateur à 7. Ne soudez pas un récipient fermé, tel un réservoir ou un adduction d’air approuvé. baril. 4. Lisez les fiches signalétiques et les consignes du fabricant 8. Connectez le câble de soudage le plus près possible de relatives aux métaux, aux produits consummables, aux...
  • Page 17 Firepower MST 140i 6. Ne placez pas le visage face à l’ouverture du robinet de 1. Assurez-vous que les portes, les panneaux, les capots et la bouteille lors de son ouverture. les protecteurs soient bien fermés. 7. Laissez en place le chapeau de bouteille sauf si en utili- 2.

  • Page 18: Informations Générales De Sécurité

    Firepower MST 140i 1. Maintenez les câbles l’un près de l’autre en les entrelaçant ou les reliant ensemble au ruban. 2. Acheminez les câbles à un côté du soudeur, le plus AVERTISSEMENT loin possible. LA VAPEUR ET LE LIQUIDE DE REFROIDISSE- 3.
  • Page 19 Firepower MST 140i Entretien des Locaux Bouteilles de Gaz Comprimé Le Département des Transports américain (DOT) approuve la conception et la fabrication des bouteilles qui contiennent les AVERTISSEMENT gaz utilisés pour les opérations de soudage ou de découpage. Ne laissez jamais l’oxygène en contact avec la 1.

  • Page 20: Principales Normes De Securite

    Firepower MST 140i 1.08 Principales Normes De Securite Safety in Welding and Cutting, norme ANSI Z49.1, American AVERTISSEMENT Welding Society, 550 N.W. LeJeune Rd., Miami, FL 33128. N’UTILISEZ PAS la bouteille si vous trouvez de Safety and Health Standards, OSHA 29 CFR 1910, Supe- l’huile, de la graisse ou des pièces endommagées.

  • Page 21: Graphique De Symbole

    Firepower MST 140i 1.09 Graphique de Symbole Seulement certains de ces symboles apparaîtront sur votre modèle. Déroulement du Fil Sous Tension Mono Phasé Alimentation du Fil Vers la Pièce de Fabrication Hors Tension Trois Phasé Hors Tension Tri-Phase Statique Soudage...

  • Page 22: Declaration Of Conformity

    Firepower MST 140i 1.10 Declaration Of Conformity Manufacturer: Victor Technologies International, Inc. Address: 16052 Swingley Ridge Road, Suite 300 St. Louis, MO 63017 The equipment described in this manual has been designed to all applicable aspects and regulations of the ‘Low Voltage Directive’...

  • Page 23: Section 2: Introduction

    SECTION 2: INTRODUCTION 2.01 How to Use This Manual 2.04 Description The Firepower MST 140i is a self contained single phase multi This Manual usually applies to the part numbers listed on page process welding system that is capable of performing MIG i.

  • Page 24: Firepower Mst 140I Portable System Package (Part No. 1444-0870)

    Firepower MST 140i 2.07 Firepower MST 140i Portable System Package (Part No. 1444-0870) Comes Complete With • Firepower MST 140i Power Source • Firepower 140 Amp MIG Gun, 10ft (3.0m) • Firepower Argon Regulator/Flowmeter & Hose • Firepower Electrode Holder & Ground Clamp •...

  • Page 25: Specifications

    Firepower MST 140i 2.09 Specifications DESCRIPTION Firepower MST 140i MULTI PROCESS 3 IN 1 WELDER Power Source System Part No. 1444-0870 Power Source System Dimensions H16.14” x W8.27” x D17.72” (410mm x 210mm x 450mm) Power Source System Weight 32.2lb (14.6kg)

  • Page 26: Options And Accessories

    630, National Electrical Code) Firepower continuously strives to produce the best product possible and therefore reserves the right to change, improve or revise the speci fications or design of this or any product without prior notice. Such updates or changes do not entitle the buyer of equipment previously sold or shipped to the corresponding changes, updates, improve- ments or replacement of such items.

  • Page 27: Section 3: Installation, Operation And Setup

    C. In areas, free from oil, steam and corrosive gases. WARNING D. In areas, not subjected to abnormal vibration or shock. The Firepower MST 140i must be electrically E. In areas, not exposed to direct sunlight or rain. connected by a qualified electrical trades-person.
  • Page 28 Firepower MST 140i Electrical Input Requirements Operate the welding Power Source System from a single-phase 50/60 Hz, AC power supply. The input voltage must match one of the electrical input voltages shown on the input data label on the unit nameplate. Contact the local electric utility for information about the type of electrical service available, how proper connections should be made, and inspection required.

  • Page 29: Electromagnetic Compatibility

    Firepower MST 140i 3.05 Electromagnetic Compatibility 7. The time of day that welding or other activities are to be carried out. 8. The compatibility of other equipment in the environment: the user shall ensure that other WARNING equipment being used in the environment is...

  • Page 30: Firepower Flowmeter/ Regulator

    Tighten securely with a wrench. PRESSURE ADJUSTING SCREW A-12435 Figure 3-1: Firepower CS Flowmeter/ Regulator WARNING Use the flowmeter/ regulator for the gas and pressure for which it is designed. NEVER alter a flowmeter/ regulator for use with any other gas.
  • Page 31 Firepower MST 140i WARNING DO NOT attach or use the flowmeter/ regulator if oil, grease, flamma ble substances or damage is present! Have a qualified repair technician clean the flowmeter/ regulator or repair any damage. Art # A-09828 Art # A-12436 Figure 3-3: Open Cylinder Valve 9.

  • Page 32: Leak Testing The System

    Firepower MST 140i 3.07 Leak Testing the System 3.08 When You Finish Using the Flowmeter/ Regulator Leak test the system before putting into operation. 1. Close the cylinder valve. 1. Be sure that there is a valve in the downstream equipment to turn off the gas flow.

  • Page 33: Power Source System Controls, Indicators And Features

    Firepower MST 140i 3.10 Power Source System Controls, Indicators and Features See pages 3-8 through 3-14 for details. POWER FAULT LIFT TIG STICK STICK SOFT SOFT HARD HARD DOWNSLOPE (S) DOWNSLOPE (S) ARC FORCE (%) WIRESPEED INDUCTANCE WIRESPEED ARC FORCE (%)
  • Page 34 Power Source System to deliver the desired level of weld current. 4. MIG Gun The MIG Gun adapter is euro connection for the Firepower MIG Gun. MIG Gun remote control is routed through the euro adapter fitting. Connect the MIG Gun by pushing the MIG...
  • Page 35 Firepower MST 140i 5. Positive Welding Output Terminal The positive welding terminal is used to connect the welding output of the power source to the appropriate welding accessory such as the MIG Gun (via the MIG Gun polarity lead), electrode holder lead or work lead. Positive welding current flows from the power source via 25mm Dinse style connector.
  • Page 36 Firepower MST 140i 8. Remote Control The 8 pin socket is used to connect the TIG Gun, remote control device to the welding Power Source. To make connections, align keyway, insert plug, and rotate threaded collar fully clockwise. Trigger Switch...
  • Page 37 Firepower MST 140i 9. Multifunction Control - Voltage, Down Slope & Arc Force The multifunction control knob is used to adjust Voltage (MIG Mode), Down slope (LIFT TIG Mode) and Arc Force (STICK Mode) depending on the welding mode selected.
  • Page 38 Firepower MST 140i 10. Arc Control (Inductance) The arc control operates in MIG mode only and is used to adjust the intensity of the welding arc. Lower arc control settings make the arc softer with less weld spatter. Higher arc control settings give a stronger driving arc which can increase weld penetration.
  • Page 39 Firepower MST 140i 13. Digital Voltage Meter (Right Digital Display) The digital voltage meter is used to display the both the preview voltage (MIG mode only) and actual output voltage (all modes) of the Power Source. At times of non-welding, the voltage meter will display a preview value in MIG mode. This value can be adjusted by varying the multifunction control knob (Control No.
  • Page 40 Firepower MST 140i 17. Intelligent Fan Control When Power Supply is first turned on it will default in MIG Mode. The Fan will operate for approximately 10 seconds, then shut down. When triggered in MIG mode, fan will not turn on until Power Supply reaches temperatures (Back) in which cooling is required.

  • Page 41: Attaching The Firepower 140A Mig Gun

    Firepower MST 140i 3.11 Attaching the Firepower 140A MIG Gun Fit the MIG Gun to the Power Source by pushing the MIG Gun connector into the MIG Gun Adapter and tightening the Locking Nut to secure the MIG Gun in the MIG Gun Adapter.

  • Page 42: Inserting Wire Into The Wire Feed Mechanism

    Firepower MST 140i 3.12 Inserting Wire into the Wire Feed Mechanism Release the tension from the Pressure Roller Arm by turning the adjustable Wire Drive Tension Screw in a counterclockwise. Then to release the pressure roller arm push the tension screw toward the front of the machine which releases the pressure roller arm.

  • Page 43: Installing 4" (100Mm) Diameter Spool

    Firepower MST 140i 3.13 Installing 4" (100mm) Diameter Spool As delivered from the factory, the Power Source is fitted with a Wire Spool Hub which accepts a 8" (200mm) diameter spools. In order to fit a 4" (100mm) diameter spool assemble parts in the sequence shown below in Figure 3-11.

  • Page 44: Installing 8" (200Mm) Diameter Spool

    Firepower MST 140i 3.14 Installing 8" (200mm) Diameter Spool As delivered from the factory, the Power Source is set for a 8" (200mm) diameter spool. In order to re-fit a 8" (200mm) spool assemble parts in the sequence shown below in Figure 3-12.

  • Page 45: Feed Roller Pressure Adjustment

    Firepower MST 140i 3.15 Feed Roller Pressure Adjustment The pressure (top) roller applies pressure to the grooved feed roller via an adjustable pressure screw. These devices should be adjusted to a minimum pressure that will provide satisfactory wire feed without slippage. If slipping occurs, and inspection of the wire contact tip reveals no wear, distortion or burn back jam, the conduit liner should be checked for kinks and clogging by metal flakes and debris.

  • Page 46: Wire Reel Brake

    Firepower MST 140i 3.17 Wire Reel Brake The wire reel hub incorporates a friction brake which is adjusted during manufacture for optimum breaking. If it is considered necessary, adjustment can be made by turning the large nut inside the open end of the hub clockwise to tighten the brake.

  • Page 47: Flowmeter/ Regulator Operation

    C. Fit the MIG Gun to the Power Source. (Refer to Section 3.11 Attaching the Firepower 140A MIG Gun). D. Connect the work lead to the negative welding terminal (-). If in doubt, consult the electrode wire manufacturer. Welding current flows from the Power Source via Dinse style connectors.
  • Page 48 Firepower MST 140i WARNING Before connecting the work clamp to the work piece, make sure you have ceased feeding wire so premature arcing will not occur. Secure the shielding gas cylinder in an upright position by chaining it to a suitable stationary support to prevent falling or tipping.

  • Page 49: Setup For Mig (Fcaw) Welding With Flux Core (Gasless) Wire

    Firepower MST 140i 3.20 Setup for MIG (FCAW) Welding with Flux Core (Gasless) Wire A. Select MIG mode with the process selection control (refer to Section 3.10.12 for further information). B. Connect the MIG Gun Polarity Lead to the negative welding terminal (-). If in doubt, consult the electrode wire manufacturer.

  • Page 50: Setup For Lift Tig (Gtaw) Welding

    NOTE A Firepower 17V TIG torch with an 8 pin plug must be used to turn the weld current on/off via the TIG torch trigger switch to TIG weld OR a Firepower Foot Control with an 8 pin plug must be used to turn the weld current on/off as well as providing remote control of the weld current.
  • Page 51 8 pin plug must be used to turn the weld current on/off via the TIG torch trigger switch to TIG weld OR a Firepower Foot Control with an 8 pin plug must be used to turn the weld current on/off as well as providing...

  • Page 52: Setup For Stick (Smaw) Welding

    Firepower MST 140i 3.22 Setup for STICK (SMAW) Welding A. Connect the Electrode Holder lead to the positive welding terminal (+). If in doubt, consult the electrode manufacturer. Welding current flows from the Power Source via Dinse style connectors. It is essential, however, that the male plug is inserted and turned securely to achieve a sound electrical connection.

  • Page 53: Section 4: Basic Welding Guide

    Firepower MST 140i SECTION 4: BASIC WELDING GUIDE 4.01 MIG (GMAW/FCAW) Basic Welding Technique Two different welding processes are covered in this section (GMAW and FCAW), with the intention of providing the very basic concepts in using the MIG mode of welding, where a welding MIG Gun is hand held, and the electrode (welding wire) is fed into a weld puddle, and the arc is shielded by an inert welding grade shielding gas or inert welding grade shielding gas mixture.
  • Page 54 Firepower MST 140i The welding Gun should be held at an angle to the weld joint. (see Secondary Adjustment Variables below) Hold the MIG Gun so that the welding seam is viewed at all times. Always wear the welding helmet with proper filter lenses and use the proper safety equipment.
  • Page 55 Firepower MST 140i Preselected Variables Preselected variables depend upon the type of material being welded, the thickness of the material, the welding position, the deposition rate and the mechanical properties. These variables are: • Type of electrode wire • Size of electrode wire •...
  • Page 56 Firepower MST 140i Direction of Gun Travel 90° Leading or “Pushing” Trailing or “Pulling” Angle Angle (Forward Pointing) (Backward Pointing) Nozzle Angle, Right Handed Operator Art # A-08999_AC Figure 4-10 Establishing the Arc and Making Weld Beads Before attempting to weld on a finished piece of work, it is recommended that practice welds be made on a sample metal of the same material as that of the finished piece.
  • Page 57 Firepower MST 140i Firepower MIG, Lift TIG, Stick Wire Selection Chart Art # A-12462 Table 4-1: MIG, Lift TIG, Stick Welding Set up Chart Manual 0-5338 BASIC WELDING GUIDE...

  • Page 58: Mig (Gmaw/Fcaw) Welding Troubleshooting

    Firepower MST 140i 4.02 MIG (GMAW/FCAW) Welding Troubleshooting Solving Problems Beyond the Welding Terminals The general approach to fix Gas Metal Arc Welding (GMAW) problems is to start at the wire spool then work through to the MIG Gun. There are two main areas where problems occur with MIG, Porosity and Inconsistent wire feed Solving Problems Beyond the Welding Terminals - Porosity When there is a gas problem the result is usually porosity within the weld metal.
  • Page 59 Firepower MST 140i Solving Problems Beyond the Welding Terminals - Inconsistent Wire Feed Wire feeding problems can be reduced by checking the following points. FAULT CAUSE 1 Feed roller driven by motor in the Wire spool brake is too tight or drive roll tension not cabinet slipped tight enough.
  • Page 60 Firepower MST 140i Basic MIG Welding Troubleshooting FAULT CAUSE REMEDY 1 Undercut A Welding arc voltage too high. A Decrease voltage or increase the wire feed speed. B Incorrect MIG Gun angle B Adjust angle. C Excessive heat input C Increase the MIG Gun travel speed and/or decrease welding current by decreasing the voltage or decreasing the wire feed speed.

  • Page 61: Stick (Smaw) Basic Welding Technique

    C Low primary voltage C Contact supply authority. D Fault in power source D Have an Accredited Firepower Service Provider to test then replace the faulty component. 8 Arc does not have a The MIG Gun has been con-...

  • Page 62: Effects Of Stick Welding Various Materials

    Firepower MST 140i 4.04 Effects of Stick Welding Various Materials High Tensile and Alloy Steels The two most prominent effects of welding these steels are the formation of a hardened zone in the weld area, and, if suitable precautions are not taken, the occurrence in this zone of under-bead cracks. Hardened zone and under-bead cracks in the weld area may be reduced by using the correct electrodes, preheating, using higher current settings, using larger electrodes sizes, short runs for larger electrode deposits or tempering in a furnace.
  • Page 63 Firepower MST 140i Art# A-07693 Figure 4-17: Overhead Position, Butt Weld Art A-07691 Figure 4-15: Vertical Position, Butt Weld Art # A-07694 Figure 4-18: Overhead Position, Fillet Weld Art # A-07692 Figure 4-16: Vertical Position, Fillet Weld Joint Preparations In many cases, it will be possible to weld steel sections without any special preparation. For heavier sections and for repair work on castings, etc., it will be necessary to cut or grind an angle between the pieces being joined to ensure proper penetration...
  • Page 64 Firepower MST 140i Arc Welding Technique - A Word to Beginners For those who have not yet done any welding, the simplest way to commence is to run beads on a piece of scrap plate. Use mild steel plate about 1/4" (6.4mm) thick and a 1/8"(3.2mm) electrode. Clean any paint, loose scale or grease off the plate and set it firmly on the work bench so that welding can be carried out in the downhand position.
  • Page 65 Firepower MST 140i 20°-30° Electrode Tack Weld Tack Weld Art # A-07697_AB Figure 4-21: Butt Weld Art # A-07698 Figure 4-22: Weld Build up Sequence Heavy plate will require several runs to complete the joint. After completing the first run, chip the slag out and clean the weld with a wire brush.
  • Page 66 Firepower MST 140i C. Vertical Welds 1. Vertical Up Tack weld a three feet length of angle iron to your work bench in an upright position. Use a 1/8"(3.2mm) E7014 Stick electrode and set the current at 100 amps. Make yourself comfortable on a seat in front of the job and strike the arc in the corner of the fillet.
  • Page 67 Firepower MST 140i Art # A-07704 Figure 4-28: Overhead Fillet Weld Distortion Distortion in some degree is present in all forms of welding. In many cases it is so small that it is barely perceptible, but in other cases allowance has to be made before welding commences for the distortion that will subsequently occur. The study of distortion is so complex that only a brief outline can be attempted hear.
  • Page 68 Firepower MST 140i Overcoming Distortion Effects There are several methods of minimizing distortion effects. A. Peening This is done by hammering the weld while it is still hot. The weld metal is flattened slightly and because of this the tensile stresses are reduced a little.

  • Page 69: Stick (Smaw) Welding Troubleshooting

    Firepower MST 140i Art # A-07713_AB Art # A-07711_AB Figure 4-37: Staggered Intermittent Welding Figure 4-35: Step back Sequence Art # A-07428_AB Figure 4-36: Chain Intermittent Welding 4.05 Stick (SMAW) Welding Troubleshooting FAULT CAUSE REMEDY 1 Welding current ARC FORCE control knob is...
  • Page 70 Firepower MST 140i FAULT CAUSE REMEDY Art # A-05866_AC Incorrect Sequence Figure 1- Example of insufficient gap or incorrect sequence Insufficient Gap 4 A groove has been A Welding current is too high. A Reduce welding current. formed in the base metal adjacent to B Welding arc is too long.
  • Page 71 Firepower MST 140i FAULT CAUSE REMEDY 6 Gas pockets or A High levels of sulfur in steel. A Use an electrode that is designed for high sulfur voids in weld steels. metal (porosity) B Electrodes are damp. B Dry electrodes before use.

  • Page 72: Tig (Gtaw) Basic Welding Technique

    Firepower MST 140i 4.06 TIG (GTAW) Basic Welding Technique Gas Tungsten Arc Welding (GTAW) or TIG (Tungsten Inert Gas) as it is commonly referred to, is a welding process in which fusion is produced by an electric arc that is established between a single tungsten (non-consumable) electrode and the work piece.
  • Page 73 TIG Welding is generally regarded as a specialized process that requires operator competency. While many of the principles outlined in the previous Arc Welding section are applicable a comprehensive outline of the TIG Welding process is outside the scope of this Operating Manual. For further information please refer to www.firepower.com or contact Firepower. Manual 0-5338...

  • Page 74: Tig (Gtaw) Welding Problems

    Firepower MST 140i 4.07 TIG (GTAW) Welding Problems FAULT CAUSE REMEDY 1 Excessive bead build up or Welding current is too Increase weld current and/or faulty joint poor penetration or poor preparation. fusion at edges of weld. 2 Weld bead too wide and Welding current is too Decrease weld current.
  • Page 75 Firepower MST 140i FAULT CAUSE REMEDY 7 Dirty weld pool A Electrode contaminated A Clean the electrode by grinding off the con- by contact with work taminates. piece or filler rod mate- rial. B Work piece surface has B Clean surface.
  • Page 76 Firepower MST 140i This Page Intentionally Blank BASIC WELDING GUIDE 4-24 Manual 0-5338...

  • Page 77: Section 5: Power Source Problems And Routine Service Requirements

    Firepower MST 140i SECTION 5: POWER SOURCE PROBLEMS AND ROUTINE SERVICE REQUIREMENTS 5.01 Power Source Problems FAULT CAUSE REMEDY 1 Primary Power Supply is A Power Source is not in the correct A Set the Power Source to the cor- ON, power indicator is illu- mode of operation.
  • Page 78 Firepower MST 140i FAULT CAUSE REMEDY 7 No gas flow in MIG mode. A Gas hose is damaged. A Replace or repair. B Gas passage contains debris. B Disconnect gas hose from the rear of Power Source and blow out debris.

  • Page 79: Routine Service

    All unsafe accessories shall not be used. D. Repairs If any parts are damaged for any reason, it is recommended that replacement be performed by an accredited Firepower Service Provider. Manual 0-5338...

  • Page 80: Cleaning The Welding Power Source

    Fabricator 141i TIG (GTAW) MIG (GMAW/ FCAW) STICK (SMAW) 90 100 110 120 130 140 150 Welding Current (Amps) Art # A-11807 Figure 5-1: Firepower MST 140i Volt-Ampere Curves TROUBLE SHOOTING AND SERVICE Manual 0-5338...

  • Page 81: Section 6: Key Spare Parts

    Universal Conduit Liner* 1444-0883 Conductor Tube, Firepower Fusion 16201108 140A/180A/220A MIG Gun, 60 Deg Table 6-1: Firepower 140A MIG Gun Parts ** Patent Pending * Refer to Firepower Catalog No. ???? for additional options. Figure 6-1 Manual 0-5338 KEY SPARE PARTS...

  • Page 82: Power Source

    Firepower MST 140i 6.02 Power Source KEY SPARE PARTS Manual 0-5338...
  • Page 83 W7004961 Thermistor, NTC, K45 47K, MST 140i W7004940 PCB Burnback Potentiometer 1444-0939 Label, Setup Chart - English Version, FP MST 140i, (not shown) Label, Setup Chart, FP MST 140i, French (not shown) W7006212 Inductor, MST 140i (not shown) W7004951 Spool Hub, MST 140i...

  • Page 84: Hardware List

    Screw Hexagon HD 9/32 × 16 ×19 Wirefeeder Plate Screw Skt Set M4 × 0.7 Firepower No. 4 Torch Adaptor Screw Hexagon M6 × 1.0-10 ST ZP Firepower No. 4 Torch Adaptor Nut Hexagon M10 × 1. 5 ST ZP Firepower No.
  • Page 85 Firepower MST 140i NOTE All the hardware can be purchased from local store. SCREW ITEM 4, OFF USED TO SECURE MOULDING TO INTERNAL PANEL SCREW ITEM 5, OFF USED TO SECURE MOULDING TO BASE PANEL SCREW ITEM 5, 2 OFF USED...
  • Page 86 Firepower MST 140i This Page Intentionally Blank. KEY SPARE PARTS Manual 0-5338...

  • Page 87: Appendix

    Firepower MST 140i APPENDIX This Page Intentionally Blank. Manual 0-5338 APPENDIX...

  • Page 88: Appendix: Firepower Mst 140I Circuit Diagram

    Firepower MST 140i APPENDIX: Firepower MST 140i CIRCUIT DIAGRAM Art # A-12517 APPENDIX Manual 0-5338...
  • Page 89 Firepower MST 140i Art # A-12517 Manual 0-5338 APPENDIX...

  • Page 90: Firepower - Limited Warranty Terms

    “Purchaser” that its products will be free of defects in workmanship or material. Should any failure to conform to this warranty appear within the time period applicable to the Firepower products as stated below, Firepower shall, upon notification thereof and substantiation that the product has been stored, installed, operated, and maintained in accordance with Firepower’s specifications, instructions, recommendations and rec-...

  • Page 91: Warranty Schedule

    * 2 years on Power Supply Components 2 Years Parts / No Labor Auto-Darkening Welding Helmet (electronic Lens), ** 1 Month Harness Assy Firepower Regulator for Firepower MST 220i (No labor) 90 days parts / No Labor Remote Controls MIG and TIG Torches (Supplied with power sources)
  • Page 92 T E C H N O L O G I E S ™ U.S. Customer Care: 800-426-1888 / FAX 800-535-0557 Canada Customer Care: 905-827-4515 / FAX 800-588-1714 International Customer Care: 940-381-1212 / FAX 940-483-8178 Printed in China © 2012 Victor Technologies International, Inc. www.firepower.com...

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