ESAB MT-400EHD Instructions For Use Manual
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ESAB MT-400EHD Instructions For Use Manual

Mig welding gun with bayonet connector
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INSTRUCTIONS for
These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the principles of operation
and safe practices for arc welding equipment, we urge you to read our booklet, "Precautions and Safe Practices for
Arc Welding, Cutting and Gouging." Form 52-529. Do NOT permit untrained persons to install, operate, or maintain
this equipment. Do NOT attempt to install or operate this equipment until you have read and fully understand these
Instructions. If you do not fully understand these Instructions, contact your supplier for further information. Be
sure to read the Safety Precautions on page 3 before installing or operating this equipment.
Be sure this information reaches the operator.
You can get extra copies through your supplier.
MT-200, MT-400 & MT-400EHD*
MIG WELDING GUN
WITH BAYONET CONNECTOR
F-12-778-H
June, 1999
*Extra Heavy Duty (EHD)

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Summary of Contents for ESAB MT-400EHD

  • Page 1 INSTRUCTIONS for F-12-778-H June, 1999 MT-200, MT-400 & MT-400EHD* MIG WELDING GUN WITH BAYONET CONNECTOR *Extra Heavy Duty (EHD) These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the principles of operation and safe practices for arc welding equipment, we urge you to read our booklet, "Precautions and Safe Practices for Arc Welding, Cutting and Gouging."...

  • Page 2: Table Of Contents

    USER RESPONSIBILITY This equipment will perform in conformity with the description thereof contained in this manual and accompany- ing labels and/or inserts when installed, operated, maintained, and repaired in accordance with the instructions pro- vided. This equipment must be checked periodically. Malfunctioning or poorly maintained equipment should not be used.
  • Page 3 SAFETY PRECAUTIONS WARNING: hese Safety Precautions are for 5. Do not use equipment beyond its ratings. For example, your protection. They summarize precaution- overloaded welding cable can overheat and create a fire ary information from the references listed in hazard. Additional Safety Information section.
  • Page 4 SAFETY PRECAUTIONS EQUIPMENT MAINTENANCE -- Faulty or FUMES AND GASES -- Fumes and improperly maintained equipment can gases, can cause discomfort or harm, cause injury or death. Therefore: particularly in confined spaces. Do not breathe fumes and gases. Shield- 1. Always have qualified personnel perform the installa- ing gases can cause asphyxiation.
  • Page 5 PRÉCAUTIONS DE SÉCURITÉ...
  • Page 6 PRÉCAUTIONS DE SÉCURITÉ...

  • Page 7: Introduction

    I. INTRODUCTION heavy duty torque crimped cable design - elimi- 1.1 SCOPE nates premature failure of soldered cables due to constant flexing and subsequent work hardening This manual provides installation, operation, service and breakage of copper conductor strands. and parts information for the MT-200, MT-400 and MT- 400EHD air-cooled welding torch with bayonet type contact tips, or heavy-duty contact tubes - many connector for connecting to Mig-35 and Digimig.

  • Page 8: Required Equipment

    TABLE 1.2 Basic Torch Assemblies Available (see Fig. 5.1)* Basic torches do not include liners, contact tips/tubes, or nozzles. Mix and match the accessories listed in Fig. 1.4 and Tables 1.4.1, 1.4.2, and 1.4.3 to customize a torch for your welding application. Basic Assy./Length 10-ft.

  • Page 9: Torch Accessory Guide & Selection

    II. INSTALLATION 1.4 TORCH ACCESSORY GUIDE & SELECTION - Fig. 1.4, & Tables 1.4.1, 1.4.2 and 1.4.3. 1. Install the proper feed roll (see Table 1.3) to the Standard Duty Tips and Nozzles provide good perfor- wire feeder. Refer to the wire feeder booklet for mance and service life for the majority of welding installation and adjustment details.
  • Page 10 Table 1.4.1 Recommended Contact Tips, Tubes and Adaptors Standard Duty Heavy Duty* Heavy Duty* Wire Contact Tips Contact Tips Contact Tubes Sizes & Type Short Medium Long Short Medium Short Medium For Hard and Cored Wires .023” (.6mm) 20543 999742 .030”...

  • Page 11: Operation

    TABLE 1.4.3 Recommended Liners Accessories Wire Liner Size & Type Hard Wires & Cored Wires .023" (.6mm) 999743* 34929* .030" (.8mm) 948850 17717 .035" (.9mm) 2075237 17718 2075238 18235 .045" (1.2mm) 2075237 17718 2075238 18235 .052" (1.4mm) 2075239 17719 2075240 18236 1/16"...

  • Page 12: Pre-Weld Requirements

    a. Correct size liner, guide tube, contact tip and nozzle and perchloroethylene, to form phosgene, even are installed and uncontaminated by dirt or spat- when these vapors are present in low concentra- ter. tions. Do NOT weld where chlorinated solvents are present in atmospheres in or around the arc.

  • Page 13: Shutdown Procedure

    It is recommended that worn parts be replaced with parts manufactured and sold by ESAB Welding & Cut- To avoid shock, do not depress trigger while han- ting Products.

  • Page 14: Nozzles

    4.3 NOZZLES at a time. An occasional slight whip-snapping of IMPORTANT the inlet flex support will also facilitate liner instal- Do not hammer torch or nozzle to remove spatter. lation is illustrated below. Spatter can be removed from the inside of the nozzle with a hand reamer or file.

  • Page 15: 3-In. Wire Feed Liner

    Figure 4.4 - Installing 0.023-in. Inner and Support Liners against the end of the wire guide. Reinstall front 11. Install tip adaptor wrench tight to seat the liner. insulator and tip adaptor. Then tighten the setscrew in the curved wire guide with the supplied 5/64-in.

  • Page 16: Torch Switch

    RUBBER KEYS 5.2 ORDERING To assure proper operation, it is recommended that only genuine ESAB parts be used with this equipment. To order replacement parts: a. Give the part number, description and quantity of each part required. If you desire to have the switch assembly located on b.
  • Page 17 22 ** 21A ** 21B ** 23 ** 24 ** ** Denotes Items Not Included With Basic Torch Fig. 5.1 - Replacement Parts - MT-200 & MT-400 Basic Torch Assemblies...
  • Page 18 Replacement Parts List for Figure 5.1. MT-200 Basic Torch Assembly, 10-Ft., 998888 MT-400 Basic Torch Assembly, 10-Ft., 999469 MT-200 Basic Torch Assembly, 12-Ft., 948921 MT-400 Basic Torch Assembly, 12-Ft., 948922 MT-200 Basic Torch Assembly, 15-Ft., 998887 MT-400 Basic Torch Assembly, 15-Ft., 999470 MT-400 Basic Torch Assembly, 25-Ft., 18232 ITEM QTY.
  • Page 19 Figure 5.2 - Replacement Parts - Wire Feeder Connector Assembly (for Mig-35/Digimig Wire Feeders) -- P/N 2075378...
  • Page 20 ESAB Welding & Cutting Products, Florence, SC Welding Equipment COMMUNICATION GUIDE - CUSTOMER SERVICES A. CUSTOMER SERVICE QUESTIONS: Order Entry Product Availability Pricing Delivery Order Changes Saleable Goods Returns Shipping Information Eastern Distribution Center Telephone: (800)362-7080 / Fax: (800) 634-7548...

This manual is also suitable for:

Mt-200Mt-400

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