Cobra® MX Lincoln Compatible
Contents
1. salu DE demo de Vie Keep flammable materials away Mantenga el material combustible fuera del rea de trabajo Gardez l cart de tout mat riel inflammable Entfernen Sie brennbarres Material Mantenha inflam veis bem guarda dos CRAP TU ENONTOMEER EA ei 93 A LA ses uaa Be Asal ng vane Oise MEDA 29 34 quis Wear eye ear and body protection e Prot jase los ojos los o dos y ei cuerpo Prot gez vos yeux vos oreilles et votre corps Tragen Sie Augen Ohren und K r perschutz Use prote o para a vista ouvido e corpo FRUSSCRBRALTT Ebr CARR X3R5SHPSORNERA ex 719 20 Eis daly dye y day Cl gi pa READ AND UNDERSTAND THE MANUFACTURER S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES BE USED AND FOLLOW YOUR EMPLOYER S SAFETY PRACTICES SE RECOMIENDA LEER Y ENTENDER LAS INSTRUCCIONES DEL FABRICANTE PARA EL USO DE ESTE EQUIPO Y LOS CONSUMIBLES QUE VA A UTILIZAR SIGA LAS MEDIDAS DE SEGURIDAD DE SU SUPERVISOR LISEZ ET COMPRENEZ LES INSTRUCTIONS DU FABRICANT EN CE QUI REGARDE CET EQUIPMENT ET LES PRODUITS A ETRE EMPLOYES ET SUIVEZ LES PROCEDURES DE SECURITE DE VOTRE EMPLOYEUR LESEN SIE UND BEFOLGEN SIE DIE BETRIEBSANLEITUNG DER ANLAGE UND DEN ELEKTRODENEINSATZ DES HER STELLERS DIE UNFALLVERHUTUNGSVORSCHRIFTEN DES ARBEITGEBERS SIND EBENFALLS ZU BEACHTEN Co2. 114 Cobrau Lincoln Compatible PRODUCTS Owner s Manual Product Cobra MX Lincoln Shown with Classic Cup Serial 11060001 Voltage Rating 24 VDC Revision Sept 2013 Rev C Gun models 276 8xx A C 1 4 277 8xx A C 3 8 278 8xx 1 4 279 8xx W C 3 8 Shown with MAX Cup Ce 175 Ampere Air Cooled 1 4 tip 200 Ampere Air Cooled 3 8 tip 225 Ampere Water Cooled 1 4 tip 250 Ampere Water Cooled 3 8 tip Push Pull Welding Guns Table of Contents Safety Considerations Installation Technical Specifications Support Equipment Required Coolant Requirements Gun Lead Connections Operation General Controls and Settings Trigger Adjustment Drive Roll and Idler Rolls Accessories Optional Kits Conduits Snake Skins Contact Tips Gas Cups Maintenance Periodic Maintenance Recommended Spare Parts List Troubleshooting Troubleshooting Guide Testing the Gun Appendices Diagrams Parts List Mechanical Electrical Safety Warnings Warranty Declaration of Conformity for European Community CE Products Note Ls This information is provided for units with CE certification see rating label on unit Manufacturer s Name M K P rod u cts y nc 16882 Armstrong Ave Irvine CA 92606 Declares that the product Cob ra MX Li n col n Com pati b le conforms to the following Directives and Standards Directives Low Voltage Directive 2006 95 EC Electromagnetic Compatibility
3. 843 0715 35 843 0715 50 Assy Controller Cable 005 0690 005 0691 005 0740 005 0692 Hose Retainer is re usable and can be removed and re installed as needed Power Cable includes copper wrap P N 701 0053 1 1 al lalalalalala N O JO BIOIN LO Cobra MX Lincoln Compatible TM Owner s Manual Page 21 Cobra MX Lincoln Compatible Lead Assembly Water Cooled AG gt JA SEE PROCEDURE 033 0929 ZA APPLY QUICK DRYING HOSE LUBRICANT NEAR NON FITTING END OF 5 12 13 amp 14 FOR INSTALLATION OF ITEM 9 AZA APPLY COMPOUND JOINT NOALOX TO THE EXTERNAL THREADS OF ITEM N TRIM TEFLON LINER AFTER ASSEMBLY TEFLON LINER TO PROTRUDE 0 25 INCHES BEYOND 3 AX APPLY COMPOUND JOINT NOALOX TO THE CONTACT SURFACE BETWEEN ITEM 3 AND ITEM 2 A ITEM NOT SHOWN FOR CLARITY Lead Assembly Water Cooled No Qty Description 15 PartNo 25 35 PartNo 50 PartNo 003 2153 2 003 2345 3 4 5 7 9 E 12 13 Assy Hose Water BLUE 552 0239 15 552 0239 25 552 0239 35 552 0239 50 14 ESSSsasl Assy Controller Cable 005 0690 005 0691 005 0740 005 0692 Assy Power Cable Water Euro 005 0388 15 005 0388 25 005 0388 35 005 0388 50 Hose Retainer is re usable and can be removed and re installed as needed Cobra MX Lincoln Compatible Owner s Manual Page 22 Cobra MX Lincoln Compatible Lead Assembly Spiral Wrap Installation 033 0929 Gun End Air Cooled
4. Owner s Manual Page 1 Section B Coolant Connections If so equipped the ends of the coolant hose push over a barbed fitting on the end of the gun body and are secured by twisting the hose retainer to the end of the hose The hose retainer is re usable and can be removed and re installed as needed The BLUE coolant supply hose pushes over a barbed fitting on the end of the gun body and is secured by twisting the hose retainer to the end of the hose The hose retainer is re usable and can be removed and re installed as needed The opposite end of the BLUE hose pushes into a threaded coolant fitting The RED coolant return hose pushes over the barbed fitting in the Power Manifold The opposite end of the RED hose pushes into a threaded return hose of the coolant recirculator Both threaded fittings on the end of the BLUE and RED hoses are standard left hand thread MK Products compatible guns have interchangeable fittings so you can match as needed for your cooler Both types of fittings require a hose retainer el 431 1898 431 1910 431 1893 753 3379 5 16 Hose Retainer Quick Connect Fitting Nipple Left Hand Threaded Fitting Must be ordered together Control Cable A multi conductor control cable is used on the Cobra MX Lincoln Compatible The gun end of the cable is secured with a cable clamp and the wires are connected to the potentiometer the micro switch the motor and the gun body mechanically Slack is left in
5. EMC Directive 2004 108 EC Standards Electromagnetic Compatibility EMC EN 60974 10 2007 Torches And Guns For Arc Welding EN 60974 7 2005 SAFETY CONSIDERATIONS ELECTRIC ARC WELDING EQUIPMENT CAUTION READ BEFORE ATTEMPTING INSTALLATION OPERATION OR MAINTENANCE OF THIS EQUIPMENT 1 1 INTRODUCTION This equipment is intended for ultimate application by commercial industrial users and for operation by persons trained and experienced in the use and maintenance of welding equipment Operation should not be undertaken without adequate training in the use of such equipment Training is available from many public and private schools or similar facilities Safe practices in the installation operation and maintenance of this equipment requires proper training in the art a careful study of the information provided with the equipment and the use of common sense Rules for safe use are generally provided by suppliers of welding power sources compressed gas suppliers and electrode suppliers Careful compliance with these rules will promote safe use of this equipment The following Safety Rules cover some of the more generally found situations READ THEM CAREFULLY In case of any doubt obtain qualified help before proceeding 1 2 GENERAL PRECAUTIONS A Burn Prevention ELECTRICARC WELDING PRODUCES HIGH INTENSITY HEAT AND ULTRAVIOLET RADIANT ENERGY WHICH MAY CAUSE SERIOUS AND PERMANENT EYE DAMAGE AND WHICH MAY DAMA
6. NOT STAND SIT LIE LEAN ON OR TOUCH a wet surface when welding without suitable protection To protect against shock Keep body and clothing dry Never work in damp area without adequate insulation against electrical shock Stay on a dry duckboard or rubber mat when dampness or sweat cannot be avoided Sweat sea water or moisture between body and an electrically HOT part or grounded metal reduces the body surface electrical resistance enabling dangerous and possibly lethal currents to flow through the body 1 Grounding the Equipment When installing connect the frames of each unit such as welding power source control work table and water circulator to the building ground Conductors must be adequate to carry ground currents safely Equipment made electrically HOT by stray currents may shock possibly fatally Do NOT GROUND to electrical conduit or to a pipe carrying ANY gas or a flammable liquid such as oil or fuel Three phase connection Check phase requirement of equipment before installing If only three phase power is available connect single phase equipment to only two wires of the three phase line Do NOT connect the equipment ground lead to the third live wire or the equipment will become electrically HOT a dangerous condition that can shock possibly fatally Before welding check ground for continuity Be sure conductors are touching bare metal of equipment frames at connections If aline
7. meter Check motor and potentiometer wires for continuity Bad speed control PCB See specific cabinet control box owner s manual for speed control operation Wire feeds but welding wire is not energized Loose or no cable connections Check all power connections Contactor control cable loose or in wrong position Check power supply owner s manual for location and type of contactor signal required i e closing or 115VAC Welding power source Check power source Wire feeds erratically Dirty or worn conduit Wrong size contact tip Blow out or replace conduit See contact tip table Idler roll stuck Check for lock washer under idler roll or replace if damaged Wire feeds one speed only Bad potentiometer Check with meter Broken electrical cable Check potentiometer wires for continuity or short Bad speed control See specific cabinet control owner s manual for speed control operation Wire walks out of drive rolls Idler roll upside down Place groove in idler roll toward top Rear wire guide missing Replace wire guide Cobra MX Lincoln Compatible Owner s Manual Page 8 Troubleshooting Guide Regardless of which gun or feeder used all MK Products push pull guns operate on the same principle The slave motor in the feeder runs at a fast constant speed but has very low torque It is always tryin
8. motor leads If an open circuit more than K ohms or short exist less than 2 ohms exists check the motor leads and motor independently Testing the Potentiometer W Clocked Using the gun amphenol connector check the resistance across pin D wiper and pin C The resistance should vary from 0 5K ohms as the potentiometer is turned Check the resistance across pin D wiper and pin G The resistance should vary from 5K 0 ohms as the potentiometer is turned Testing the Micro Switch Using the gun amphenol connector check for continuity across pins E and F when the trigger is pressed e o G A W Clocked Amphenol Connector Viewed fron ector For 7 Pin only Cobra MX Lincoln Compatible Owner s Manual Page 9 THIS PAGE INTENTIONALLY LEFT BLANK Section F Appendices Diagrams Parts List Exploded View Bill of Material Front Body Assembly Rear Body Assembly Air Cooled Rear Body Assembly Water Cooled Classic Cup Barrel Assembly Air Cooled Classic Cup Barrel Assembly Water Cooled MAX Barrel Assembly Air Cooled MAX Cup Barrel Assembly Water Cooled Lead Assembly Air Cooled Lead Assembly Water Cooled Spiral Wrap Installation Power Pin Adapter Assembly Power Manifold Assembly Air Cooled Power Manifold Assembly Water Cooled Electrical Cobra MX Lincoln Compatible Owner s Manual Page 11 Air Cooled Water Cooled Y32841 TNT OL
9. shut OFF all power and remove line fuses or lock or red tag Switches to prevent accidental turning ON of power Disconnect all cables from welding power source and pull all 115 volts line cord plugs Do not open power circuit or change polarity while welding If in an emergency it must be disconnected guard against shock burns or flash from switch arcing Leaving equipment unattended Always shut OFF and disconnect all power to equipment Power disconnect switch must be available near the welding power source Cobra MX Lincoln Compatible TM Owner s Manual Page iii For selecting a quality product We want you to take pride in QW operating this product as much pride as we have in bringing the product to you Please Examine Carton and Equipment For Damage Immediately When this equipment is shipped title passes to the purchaser upon receipt by the carrier Consequently claims for material damaged in shipment must be made by the purchaser against the transportation company at the time the shipment is received Please record your equipment identification information below for future reference This information can be found on your machine nameplate Model Name amp Number Code amp Serial Number Date of Purchase Whenever you request replacements parts for or information on this equipment always supply the information you have recorded above Read this Owner s Manual completely before attempting to us
10. 250 tt Also sold in quantities of 500 023 0 6 mm 081 0 8 mm Spray 1 50 38 1 mm 621 0057 25 081 0 8 mm Short 1 75 44 5 mm 621 0328 25 030 0 8 mm Spray 621 0325 25 023 0 6 mm 030 0 8 mm 037 0 9 mm Short 1 75 44 5 mm 621 0326 25 035 030 0 9 mm 0 8 mm 036 0 9 mm 041 1 0 mm Spray 1 50 38 1 mm 1 50 38 1 mm 621 0076 25 035 0 9 mm 044 1 1 mm Spray 1 50 38 1 mm 621 0001 25 621 0001 250 621 0001 500 035 0 9 mm 041 1 0 mm Short 1 75 44 5 mm 621 0077 25 035 0 9 mm 044 1 1 mm Short 1 75 44 5 mm 621 0002 25 3 64 1 2 mm 053 1 35 mm Spray 1 50 38 1 mm 621 0327 25 3 64 1 2 mm 060 1 5 mm Spray 1 50 38 1 mm 621 0003 25 621 0003 250 621 0003 500 1 16 1 6 074 1 9 mm Spray 1 50 38 1 mm 621 0075 25 1 16 1 6 mm 085 2 1 mm Spray 1 50 38 1 mm 621 0153 25 This size tip furnished with gun All tips sold in quantities of 25 t Also sold in quantities of 250 tt Also sold in quantities of 500 Cobra MX Lincoln Compatible TM Owner s Manual Page 5 Section D Models 277 and 278 ps Spring Loaded Contact Tip 3 8 Diameter 030 0
11. Conduit Cobra MX Lincoln Compatible Owner s Manual Page 23 Cobra MX Lincoln Compatible Lead Assembly Spiral Wrap Installation 033 0929 Gun End Water Cooled Cobra MX Lincoln Compatible Owner s Manual Page 24 Cobra MX Lincoln Compatible Lead Assembly Spiral Wrap Installation 033 0929 Cabinet End Air and Water Cooled Spiral Wrap p n 261 0094 Cobra MX Lincoln Compatible Owner s Manual Page 25 Cobra MX Lincoln Compatible Power Pin Adapter Assembly P N 003 2346 APPLY SILICONE LUBRICANT TO O RINGS BEFORE INSTALLING Power Pin Adapter Assembly 303 0010 O Ring 2 014 489 ID x 07 W Cobra MX Lincoln Compatible T Owner s Manual Page 26 Cobra MX Lincoln Compatible Power Manifold Assembly Push Fitting Air Cooled P N 003 2337 TIGHTEN WITH 65 5 IN LBS TORQUE APPLY HIGH STRENGTH THREAD SEALANT Air Cooled Power Manifold Assembly 321 1104 Set Screw Conduit No E RE E Pe 1 serios Set Screw Fiat 14 20x98 55T 431 1905 Fitting 1 8 ID x 1 16 27 NPT 431 1936 Power Manifold AC Cobra MX Lincoln Compatible Owner s Manual Page 27 Cobra MX Lincoln Compatible Power Manifold Assembly Push Fitting Water Cooled P N 003 2345 APPLY HIGH STRENGTH THREAD SEALANT 2 TIGHTEN WITH 65 5 IN LBS TORQUE 2 PL Water Cooled Power Manifold Assembly 321 1104 Set Screw Conduit No ay Epor aer Pe 2 41 905 Fino V8IDx 1116
12. FOR CONSUMERS OR CONSUMER USE MK PRODUCTS WARRANTIES DO NOT EXTEND TO AND NO RE SELLER IS AUTHORIZED TO EXTEND MK PRODUCTS WARRANTIES TO ANY CONSUMER USE OF OTHER THAN GENUINE MK PRODUCTS CONSUMABLES PARTS AND ACCESSORIES MAY INVALIDATE YOUR PRODUCT WARRANTY August 1 2010 THIS PAGE INTENTIONALLY BLANK MIL PRODUCTS www mkproducts com 16882 Armstrong Ave Irvine California 92606 TEL 949 863 1234 FAX 949 474 1428
13. cord with a ground lead is provided with the equipment for connection to a switch box connect the ground lead to the grounded switch box If a three prong plug is added for connection to a grounded mating receptacle the ground lead must be connected to the ground prong only If the line cord comes with a three prong plug connect to a grounded mating receptacle Never remove the ground prong from a plug or use a plug with a broken ground prong 2 Connectors Fully insulated lock type connectors should be used to join welding cable lengths 3 Cables Frequently inspect cables for wear cracks and damage IMMEDIATELY REPLACE those with excessively worn or damaged insulation to avoid possibly lethal shock from bared cable Cables with damaged areas may be taped to give resistance equivalent to original cable Keep cable dry free of oil and grease and protected from hot metal and sparks 4 Terminals and Other Exposed Parts Terminals and other exposed parts of electrical units should have insulating covers secured before operation 5 Electrode Wire Electrode wire becomes electrically HOT when the power switch of gas metal arc welding equipment is ON and welding gun trigger is pressed Keep hands and body clear of wire and other HOT parts 6 Safety Devices Safety devices such as interlocks and circuit breakers should not be disconnected or shunted out Before installation inspection or service of equipment
14. cylinder marking agree and that the regulator inlet and cylinder outlet match NEVER Connect a regulator designed for a particular gas or gases to a cylinder containing any other gas Tighten connections When assembling threaded connections clean and smooth seats where necessary Tighten If connection leaks disassemble clean and retighten using properly fitting wrench Adapters Use a CGA adapter available from your supplier between cylinder and regulator if one is required Use two wrenches to tighten adapter marked RIGHT and LEFT HAND threads Regulator outlet or hose connections may be identified by right hand threads for oxygen and left hand threads with grooved hex on nut or shank for fuel gas 5 Pressurizing Steps Drain regulator of residual gas through suitable vent before opening cylinder or manifold valve by turning adjusting screw in clockwise Draining prevents excessive compression heat at high pressure seat by allowing seat to open on pressurization Leave adjusting screw engaged slightly on single stage regulators Stand to side of regulator while opening cylinder valve Open cylinder valve slowly so that regulator pressure increases slowly When gauge is pressurized gauge reaches regulator maximum leave cylinder valve in following position for oxygen and inert gases open fully to seal stem against possible leak for fuel gas open to less than one turn to permit quick emergency
15. third rails electrical wires or welding circuits They can produced short circuit arcs that may lead to a serious accident See 1 3C ICC or DOT marking must be on each cylinder lt is an assurance of safety when the cylinder is properly handled Identifying gas content Use only cylinders with name of gas marked on them do not rely on color to identify gas content Notify supplier if unmarked NEVER DEFACE or alter name number or other markings on a cylinder It is illegal and hazardous Empties Keep valves closed replace caps securely mark MT keep them separate from FULLS and return promptly Prohibited use Never use a cylinder or 15 contents for other than its intended use NEVER as a support or roller Locate or secure cylinders so they cannot be knocked over Passageways and work areas Keep cylinders clear of areas where they may be stuck Transporting cylinders With a crane use a secure support such as a platform or cradle Do NOT lift cylinders off the ground by their valves or caps or by chains slings or magnets Do NOT expose cylinders to excessive heat sparks slag and flame etc that may cause rupture Do notallow contents to exceed 55 degrees C 130 degrees F Cool with water spray where such exposure exists Protect cylinders particularly valves from bumps falls falling objects and weather Replace caps securely when moving cylinders Stuck valve Do NOT use a hammer or wre
16. 27 NPT 431 1951 Power Manifold WC 751 0017 Plug Sealing 4MM x 4MM SST Cobra MX Lincoln Compatible Owner s Manual Page 28 Cobra MX Lincoln Compatible Water Cooled Electrical Schematic Connector Pinout Functions 5 W Clocked Amphenol Connector Viewed from front of connector 0000000 lt Q Oooo ul u For 7 Pin only Cabinet End Amphenol Connector Cobra MX Lincoln Compatible Owner s Manual Page 29 Do not touch electrically live parts or electrode with skin or wet clothing Insulate yourself from work and ground No toque las partes o los electrodos bajo carga con la piel o ropa moja P R ECAU C del trabajo de la tierra French ATTENTION German WARNUNG Portuguese ATEN O Ne laissez ni la peau ni des v te ments mouill s entrar en contact avec des pi ces sous tension Isclez vous du travail et de la terre Ber hren Sie keine stromf hrenden Teile oder Elektroden mit Ihrem K rper oder feuchter Kleidung Isolieren Sie sich von den Elektroden und dem Erdboden N o toque partes el tricas e elec trodos com a pele ou roupa molha da e Isole se da pe a e terra e AERUPOWSIER 7 6nttcMhzocto CHTBPP xPS MEN S NTUSMELTFSU AMBER seu ERECTA e SHEE Xe 4 EE ge doa zd nie BAS HAE HRA JEN qu a Gaal Ye mag ag iy Il ui eti
17. 6 Tel 949 863 1234 Fax 949 474 1428 P RO D U CTS www mkproducts com Classification of any item into the foregoing categories shall be at the sole discretion of MK Products Notification of any failure must be made in writing within 30 days of such failure Acopy of the invoice showing the date of sale must accompany products returned for warranty repair or replacement All equipment returned to MK Products for service must be properly packaged to quard against damage from shipping MK Products will not be responsible for any damages resulting from shipping Normal surface transportation charges one way for products returned for warranty repair or replacement will be borne by MK Praducts except for products sold to foreign markets ANY EXPRESS WARRANTY NOT PROVIDED HEREIN AND ANY IMPLIED WARRANTY GUARANTY OR REPRESENTATION AS TO PERFORMANCE AND ANY REMEDY FOR BREACH OF CONTRACT WHICH BUT FOR THIS PROVISION MIGHT ARISE BY IMPLICATION OPERATION OF LAW CUSTOM OF TRADE OR COURSE OF DEALING INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR PARTICULAR PURPOSE WITH RESPECT TO ANY AND ALL EQUIPMENT FURNISHED BY MK PRODUCTS IS EXCLUDED AND DISCLAIMED BY MK PRODUCTS EXCEPT AS EXPRESSLY PROVIDED BY MK PRODUCTS IN WRITING K s PRODUCTS ARE INTENDED FOR ULTIMATE PURCHASE BY COM ERCIAL INDUSTRIAL USERS AND FOR OPERATION BY PERSONS TRAINED AND EXPERIENCED IN THE USE AND MAINTENANCE OF WELDING EQUIPMENT AND NOT
18. 8 mm 041 1 0 mm 035 0 9 mm 044 1 1 mm 3 64 1 2 mm 060 1 5 mm 1 16 1 6 mm 074 1 9 mm Spray 1 57 39 9 mm 621 0331 Spray 1 57 39 9 mm 621 0332 Spray 1 57 39 9 mm 621 0334 Spray 1 57 39 9 mm 621 0335 D gt MAX Cups Classic Cups Models 277 and 279 Models 276 and 278 6 3 8 9 5mm 621 0420 5 1 4 6 4mm 621 0079 8 1 2 12 7mm 621 0421 6 3 8 9 5mm 001 0137 4t 10 5 8 15 9mm 621 0422 8 1 2 12 7mm 001 0138 4 t standard furnished with gun 10 5 8 15 8mm 001 0139 4t tsold in packs of 4 each Tip Extender Tip Extenders and Gun Barrel Liners 931 0137 Teflon liner package 5 pieces 615 0338 Steel wire only 030 1 16 0 8 0 9mm 621 0424 Cobra MX Lincoln Compatible tip extender Air cooled barrel only 615 0250 Spiral steel liner for tip extender Maintenance Periodic Maintenance Your Cobramatic system is designed to provide years of reliable service Maintenance of the gun will normally consist of a general cleaning of the wire guide system including barrels drive rolls and conduits at regular intervals Remove spatter build up from inside of nozzles with a hardwood stick The only parts on the Cobramatic system that are subject to normal wear are the conduit contact tips gas cups front body liners wire guides drive and idl
19. Air Cooled 003 2343 Apply silicone lubricant to item 2 before installing MAX Cup Barrel Assembly Air Cooled Hx Not available separately 303 0096 O Ring 145 ID x 07W LN EN NES 2 3 1 4370299 Insulation Barrel 931 0137 5 Piece Teflon Liner Package 621 0393 Tip HD Spray 060 621 0421 Assy Gas Cup 8 CobraMAX Cobra MX Lincoln Compatible TM Owner s Manual 19 Cobra MX Lincoln Compatible MAX Cup Barrel Assembly Water Cooled 003 2344 Apply silicone lubricant to item 2 before installing MAX Cup Barrel Assembly Water Cooled ES EE a Not available separately 2 6 303 0096 O Ring 145IDx 07W 437 0299 Insulation Barrel 931 0137 5 Piece Teflon Liner Package 621 0393 Tip HD Spray 060 6 1 6210421 Assy Gas Cup 8 CobraMAX Cobra MX Lincoln Compatible T Owner s Manual Page 20 Cobra MX Lincoln Compatible Lead Assembly Air Cooled Lead Assembly Air Cooled Description 45 PartNo 25 PartNo 35 PartNo 003 2153 003 2337 003 2346 6 1 SnakeSkin___ 931 0110 931 0122 931 0132 931 0123 8 4 TeWrap 75xDiaNBk Att 0005 O Handle Kit includes item 7 005 0385 RED Assy Gas Hose 552 0241 15 552 0241 25 552 0241 35 552 0241 50 Conduit Tef Tube 615 0620 15 615 0620 25 615 0620 35 615 0620 50 Assy Power Cable Global 843 0640 15 843 0640 25 843 0640 35 843 0640 50 Ultra Flex Power Cable optional 843 0715 15 843 0715 25
20. Aya Shy Do not operate with panel open or guards off No operar con panel abierto o guardas quitadas N op rez pas avec les panneaux ouverts ou avec les dispositifs de protection enlev s Anlage nie ohne Schutzgeh use oder Innenschutzverkleidung in Betrieb setzen Mantenha se afastado das partes moventes N o opere com os paineis abertos ou guardas removidas OKRANCAN ERVALEEE ORRETHRAARS e e 20 del dum oa Ane yd colo 13 juan a Judi Ve Alo gll diat AVISO DE PRECAUCION French ATTENTION German WARNUNG Portuguese ATENCAO LEIA E COMPREENDA AS INSTRU ES DO FABRICANTE PARA ESTE EQUIPAMENTO E AS PARTES DE USO E SIGA AS PR TICAS DE SEGURAN A DO EMPREGADOR ESMEPEHOX p DHERFELHA ETHMLTF EW TLTMHORSREL HTK SU HAMM BR RARE RET R J A 55 SJ SASHA oki sala ES BAC dani yakal Gl actly Llana Ja colaall all coladas qii y Gack LI Cobra MX Lincoln Compatible Owner s Manual Page 31 LIMITED WARRANTY Effective August 1 2010 This warranty supersedes all previous MK Products warranties and is exclusive with no other guarantees or warranties expressed or implied LIMITED WARRANTY MK Products Inc Irvine California warrants that all new and unused equipment furn
21. GE ANY EXPOSED SKIN AREAS Wear helmet with safety goggles or glasses with side shields underneath appropriate filter lenses or plates protected by clear cover glass This is a must for welding or cutting and chipping to protect the eyes from radiant energy and flying metal Replace cover glass when broken pitted or spattered Medical first aid and eye treatment First aid facilities and a qualified first aid person should be available for each shift unless medical facilities are close by for immediate treatment of flash burns of the eyes and skin burns Wear protective clothing leather or asbestos gauntlet gloves hat and high safety toe shoes Button shirt collar and pocket flaps and wear cuffless trousers to avoid entry of sparks and slag Avoid oily or greasy clothing A spark may ignite them Flammable hair preparations should not be used by persons intending to weld or cut Hot metal such as electrode stubs and work pieces should never be handled without gloves Ear plugs should be worn when working on overhead or in a confined space A hard hat should be worn when others work overhead B Toxic Fume Prevention WARNING The use of this product may result in exposure to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm Adequate ventilation Severe discomfort illness or death can result from fumes vapors heat or oxygen enrichment or depleti
22. ION Once the drive roll is loose continue to spin drive roll in the clockwise direction to remove the drive roll from the gun 4 Install a new drive roll on the left hand threaded shaft The drive roll will self tighten when it is feeding wire Idler Roll Installation and Removal Reference Figure 3 1 Using a slot type screwdriver loosen idler screw taking care not to lose lock washer under idler roll 2 Insert new idler roll and lock washer onto screw insuring that idler groove is toward top and lock washer is beneath 3 Tighten Figure 2 Idler Roll F3 groove Towards Top Lock Washer 7 Idler Arm Screw Spring Figure 3 NOTE Lock washer must be under idler roll or it will not turn freely Cobra MX Lincoln Compatible Owner s Manual Page 3 Section C Accessories Optional Kits Insulated Drive Roll Kits are used to prevent preheating of the aluminum wire which may soften it and clog the liner This picking up of current at the drive rolls rather than at the contact tip is usually not a problem unless using too large of a contact tip or excessively oxidized aluminum wire Insulated Grooved Drive Roll Kit For 030 0 8mm dia aluminum wire and insulated idler roll assy Insulated Grooved Drive Roll Kit For 035 0 9mm dia aluminum wire and insulated idler roll assy Insulated Grooved Drive Roll Kit For 040 1 0mm dia aluminum wire and insulated idler roll
23. MIS ONINDO Qv3sBH Alddv TT 2 E 0 lt o I gt 2 o E O O O O E 5 gt lt Bm a O o ZIV AWS 12Y1N0O OL XO30vN ONTOS Alder NE 3273805 LIWINCO OL ISYIMO ONnOdmO Alder Vi Cobra MX Lincoln Compatible T Owner s Manual Page 12 m METE 155 91 x 0y p 105 1010026 OZ PL ejpueH LSS 8 9 0 205 9920616 OL XN 100 9 1 105 2681 18 02 jeuondo peeds 0800 12 oje d eueg JOGET 9020 07 FE Apog Assy 268 00 Ajquiassy Aly V exe V m XIN Cobra Lincoln Compatible Owner s Manual 13 Cobra MX Lincoln Compatible Front Body Assembly P N 003 2141 Front Body Assembly No PartNo NN P Notavailable separately _____ Notavailable separately Cobra MX Lincoln Compatible Owner s Manual Page 14 Cobra MX Lincoln Compatible Rear Assembly Air Cooled P N 003 2397 A JA APPLY SILICONE LUBRICANT TO O RING BEFORE INSTALL ING ctd A ON ITEM NOT SHOWN FOR CLARITY Air Cooled Rear Body Assembly 003 2199 Assy Gas Valve w Mod Valve FREE Not available separately No ay RE 3 2 305005 i 321 1082 Se
24. assy Insulated Grooved Drive Roll Kit For 3 64 1 2mm dia aluminum wire and insulated idler roll assy Insulated Grooved Drive Roll Kit For 062 1 6mm dia aluminum wire and insulated idler roll assy Handle Kit 005 0715 Includes insulated groove drive roll 005 0716 Includes insulated groove drive roll 005 0717 Includes insulated groove drive roll 005 0718 Includes insulated groove drive roll 005 0719 Includes insulated groove drive roll 005 0725 Includes left and right handles screws and drive roll door Trigger Kit 005 0726 Trigger kit includes sensitivity adjustment screw replacement for all Cobra MX Lincoln Compatible CobraMAX guns Barrel Insulator Replacement Kit 005 0696 Includes replacement barrel insulator and taper lock nut Conduits Flat spiral steel conduit for steel amp cored wire 15 ft 4 5m 25 ft 7 6m 35 ft 10 7m 50 ft 15 2m Optional nickel tube liner Snake Skins 615 0621 15 615 0621 25 615 0621 35 615 0621 50 431 2030 Snake Skin protective covers are now standard on all guns You may order spare replacement covers to protect the lead assy of the gun when the factory one becomes damaged or worn It can easily be replaced in the field by means of Velcro Snake Skin Cover 13ft for 15ft leads Snake Skin Cover 23ft for 25ft leads Snake Skin Cover 33ft for 35ft leads Snake Skin Cover 48ft for 50ft leads Gas Valve Removal Tool Gas valv
25. bra MX Lincoln Compatible Owner s Manual Page 30 Keep your head out of fumes Use ventilation or exhaust to remove fumes from breathing zone Los humos fuera de la zona de res piraci n Mantenga la cabeza fuera de los humos Utilice ventilaci n o aspiraci n para gases Gardez la t te l cart des fum es Utilisez un ventilateur ou un aspira teur pour ter les fum es des zones de travail Vermeiden Sie das Einatmen von Schweibrauch Sorgen Sie f r gute Ba und Entl ftung des Arbeitsplatzes Mantenha seu rosto da fuma a e Use ventila o e exhaust o para remover fumo da zona respirat ria b2 APSMERMTESELT Faure CANON emma Em RARE e 24754 Weise e 847E AAS 9188 2122821214 Asia dall lage dal TAAU ga bid sgn gh Jaial 6 odis glaa od Turn power off before servicing Desconectar el cable de ali mentaci n de poder de la m quina antes de iniciar cualquier servicio D branchez le courant avant l entre tien Strom vor Wartungsarbeiten abschalten Netzstrom villig ff nen Maschine anhaiten N o opere com as tampas removidas Desligue a corrente antes de fazer servi o e N o toque as partes el tricas nuas XI FIFA REZA PARKI ETEMAL FE BETE e AMS HARAR
26. e removal is performed by using P N 931 0105 Gas Valve Removal Tool This multifunctional tool has been slotted on one side to encompass and conform to the gas valve stem and seat into the slotted gas valve body as seen in Figures 1 and 2 Removal of the gas valve can be accomplished by turning the gas valve tool counter clockwise Reinstall by turning clock wise The tool doubles as a bottle opener Cobra MX Lincoln Compatible Owner s Manual Page 4 CL era LI Gas Valve Removal Tool Contact Tips Models 277 and 279 Heavy Duty Contact Tip 3 8 Diameter Figure 1 Figure 2 2 030 0 8mm 041 1 0mm 1 57 39 9mm 1 82 46 2mm 621 0390 25 621 0396 25 035 0 9mm 044 1 1mm 1 57 39 9mm 621 0391 25 621 0391 250 621 0391 500 035 0 9mm 044 1 1 mm 1 82 46 2mm 621 0397 25 045 1 1mm 3 64 1 2mm 053 1 35mm 053 1 35mm 1 82 46 2mm 1 57 39 9mm 621 0398 25 621 0392 25 621 0392 2501 621 0392 5001 3 64 1 2mm 060 1 5mm 1 57 39 9mm 621 0393 25 621 0393 250 621 0393 500 1 16 1 6mm Use of tip removal tool is recommended 074 1 9mm 085 2 16mm This size tip furnished with gun Models 276 and 278 1 4 Diameter Contact Tip 1 57 39 9mm 621 0394 25 621 0395 25 t Also sold in quantities of
27. e this equipment Save this manual and keep it handy for quick reference Pay particular attention to the safety instructions we have provided for your protection Section A Ce Installation Technical Specifications Wire Capacity 030 045 0 8mm 1 2mm solid hard wire and cored wire 030 1 16 0 8mm 1 6mm aluminum Wire Speed 800 IPM 20 3 mpm max Duty Cycle 60 All ratings are using Argon gas 175 Amps 25 Volts Air Cooled 1 4 Tip Model 276 200 Amps 25 Volts Air Cooled 3 8 Tip Model 277 225 Amps 25 Volts Water Cooled 1 4 Tip Model 278 250 Amps 25 Volts Water Cooled 3 8 Tip Model 279 Supper Equipment Required C V or C C power source of sufficient capacity for your needs Regulated gas supply and hoses Properly sized power leads from power source to wire feeder and ground Water source and hose capable of providing a minimum of 1 quart 95 liter min at 45 p s i when using water cooled guns Coolant Requirements WARNING Use only Cobra Coolant failure to use coolant will void warranty Use Cobra Coolant Aluminum Protection which does not contain reactive sulphur or chlorine and does not react with copper brass or aluminum The Cobra Coolant is available in quantities of 1 gallon P N 931 0060 5 gallon P N 931 0060 5GAL or a case of 4 gallons each P N 931 0060 4 The coolant flow rate should be a minimum of 10 GPH 1 qt min between 35 and 45psi Contact the re c
28. er rolls A supply of these parts should be maintained on hand The number of units in operation and the importance of minimal down time will determine to what extent spare parts should be stocked on hand See the recommended spare parts list for the most commonly replaced parts If repairs do become necessary qualified shop maintenance personnel can easily replace any part Maintenance Tools Contact Tip Removal Tool 931 0044 Drive Roll Removal Tool 931 0100 Cobra MX Lincoln Compatible Owner s Manual Page 6 Recommended Spare Parts List Gty PartNo Description O O O OO DRIVE ROLL REMOVAL TOOL 931 0100 KNURLED DRIVE ROLL 511 0101 IDLER ROLL 511 0001 030 3 64 023 MICRO SWITCH ASSY 003 2274 ED IDLER ROLL 511 0113 Cobra MX Lincoln Compatible Owner s Manual Page 7 Section E Troubleshooting Trouble No wire feed at gun feeder not operating i e no slave motor or brake solenoid Input power fuse in feeder control box blown Replace fuse Micro switch defective not being activated Replace switch Check switch for operation Broken electrical cable Check micro switch wires for continuity No wire feed at gun feeder operating properly Motor control fuse in feeder control box blown Check motor leads for shorts then replace fuse Bad potentiometer Broken electrical cable Check potentiometer with
29. g to feed more wire than the gun motor wants and when the motor gets all it wants it slows the slave motor preventing a bird s nest Because of the low torque produced by the slave motor a brake system is used to prevent wire overrun rather than tension The drag adjustment in the feeder is used simply to keep the wire slightly taut so it will not pull off the spool while feeding wire The high torque 24VDC gun motor is controlled by a solid state speed control located in the feeder and a pot located in the gun The gun motor potentiometer and micro switch are connected to the cabinet control box via a control cable and Amphenol connector If this cable becomes damaged a variety of symptoms can occur depending on which wire s break To test check each wire for continuity and shorts Remember the micro switch in the gun activates both the slave motor and gun motor circuits in the cabinet Therefore if the slave motor and brake solenoid operate but the gun does not look more toward the gun motor s 24 V circuits speed control control cable or the gun motor If nothing operates look more toward the slave motor s input micro switch leads or micro switch Testing The Gun Reference the W clocked gun wiring diagram on the Cobra MX electrical diagram for information about pin outs and locations Motor Check Remove the gun connector from the cabinet Using the gun Amphenol connector check the resistance across pins A and B
30. irculator manufacturer for specifications on pressure Gun Lead Connections Power Cable Air Cooled A 2 power cable is used on the Cobra MX Lincoln Compatible gun The gun and Power Pin ends of the cable are stripped to the copper strands and wrapped with a copper strip A setscrew holds the cable securely in the gun body and in the Power Manifold with torque requirements of 55 60 in lb Power Cable Water Cooled The Cobra MX Lincoln Compatible water cooled gun utilizes a power water cable with a 6 AWG cable inside a 5 16 diameter hose The power cable ends are threaded fittings which screw into the gun body and the Power Manifold These connections utilize a conductive sealant and are tightened with torque requirements of 100 5 IN LB Conduit The Cobra MX Lincoln Compatible comes standard with a poly lined conduit for feeding aluminum wire The longer fitting with a shallow groove is used on the gun end A set screw located on top of the gun handle secures the conduit in place The cabinet end of the conduit is secured into the Power Pin connector with a set screw Gas Hose The BLACK gas hose is pushed over a barbed fitting on the end of the gun body and secured by twisting the hose retainer to the end of the hose shown next page The opposite end of the BLACK hose is pushed over a barbed fitting in the Power Pin The hose retainer is re usable and can be removed and re installed as needed Cobra MX Lincoln Compatible
31. ished by MK Products is free from defects in workmanship and material as of the time and place of delivery by MK Products No warranty is made by MK Products with respect to trade accessories or other items manufactured by others Such trade accessories and other items are sold subject to the warran ties of their respective manufacturers if any MK Products warranty does not apply to components having normal useful life of less than one 1 year such as relay points wire conduit tungsten and welding gun parts that come in contact with the welding wire including gas cups gas cup insulators and contact tips where failure does not result from defect in workmanship or material MK Products shall exclusively remedy the limited warranty or any duties with respect to the quality of goods based upon the following options 1 repair 2 replacement 3 where authorized in writing by MK Products the reasonable cost of repair or replacement at our Irvine California plant As a matter of general policy only MK Products may honor an original user s warranty claims on warranted equipment in the event of failure resulting from a defect within the following periods from the date of delivery of equipment to the original user 1 Power Supplies and Wire Feed Cabinets 2 Weldheads Coolers Positioners and Push Pull Guns 1 year 3 Spool Guns and Spool Gun Modules 4 Repairs Exchanges Parts 16882 Armstrong Ave Irvine CA 9260
32. n cause a retinal burn that may leave a permanent dark area in the field of vision 3 Protection of Nearby Personnel Enclose the welding area For production welding a separate room or enclosed bay is best In open areas surround the operation with low reflective noncombustible screens or panels Allow for free air circulation particularly at floor level Viewing the weld Provide face shields for all persons who will be looking directly at the weld Others working in area See that all persons are wearing flash goggles Before starting to weld make sure that screen flaps or bay doors are closed B Toxic Fume Prevention Comply with precautions in 1 2B Generator engine exhaust must be vented to the outside air Carbon monoxide can kill C Fire and Explosion Prevention Comply with precautions in 1 2C Equipment s rated capacity Do not overload arc welding equipment It may overheat cables and cause a fire Loose cable connections may overheat or flash and cause afire Never strike an arc on a cylinder or other pressure vessel It creates a brittle area that can cause a violent rupture or lead to such a rupture later under rough handling D Compressed Gas Equipment Comply with precautions in 1 2D E Shock Prevention Exposed electrically hot conductors or other bare metal in the welding circuit or in ungrounded electrically HOT equipment can fatally shock a person whose body becomes a conductor DO
33. nburn those from gas shielded arcs are more severe and painful DON T GET BURNED COMPLY WITH PRECAUTIONS 1 Protective Clothing Wear long sleeve clothing in addition to gloves hat and shoes As necessary use additional protective clothing such as leather jacket or sleeves flameproof apron and fire resistant leggings Avoid outer garments of untreated cotton Bare skin protection Wear dark substantial clothing Button collar to protect chest and neck and button pockets to prevent entry of sparks 2 Eye and Head Protection Protect eyes from exposure to arc Eyes may be damaged by radiant energy when exposed to the electric arc even when not looking in the direction of the arc Never look at an electric arc without protection Welding helmet or shield containing a filter plate shade no 12 or denser must be used when welding Place over face before striking arc Protect filter plate with a clear cover plate Cracked or broken helmet or shield should NOT be worn radiation can be passed through to cause burns Cracked broken or loose filter plates must be replaced IMMEDIATELY Replace clear cover plate when broken pitted or spattered Flash goggles with side shields MUST be worn under the helmet to give some protection to the eyes should the helmet not be lowered over the face before an arc is struck Looking at an arc momentarily with unprotected eyes particularly a high intensity gas shielded arc ca
34. nch to open a cylinder valve that cannot be opened by hand Notify your supplier Mixing gases NEVER try to mix any gases in a cylinder NEVER refill any cylinder Cylinder fittings should never be modified or exchanged 3 Hose Prohibited use Never use hose other than that designed for the specified gas A general hose identification rule is red for fuel gas green for oxygen and black for inert gases Use ferrules or clamps designed for the hose not ordinary wire or other substitute as a binding to connect hoses to fittings No copper tubing splices Use only standard brass fittings to splice hose Avoid long runs to prevent kinks and abuse Suspend hose off ground to keep it from being run over stepped on or otherwise damaged Coil excess hose to prevent kinks and tangles Protect hose from damage by sharp edges and by sparks slag and open flame Examine hose regularly for leaks wear and loose connections Immerse pressured hose in water bubbles indicate leaks Repair leaky or worn hose by cutting area out and splicing Do NOT use tape 4 Proper Connections Clean cylinder valve outlet of impurities that may clog orifices and damage seats before connecting regulator Except for hydrogen crack valve momentarily pointing outlet away from people and sources of ignition Wipe with a clean lintless cloth Before Match regulator to cylinder connecting check that the regulator label and
35. ng equipment during and for some time after welding or cutting if 1 Appreciable combustibles including building construction are within 35 feet 2 Appreciable combustibles are further than 35 feet but can be ignited by sparks 3 Openings concealed or visible in floors or walls within 35 feet may expose combustibles to sparks 4 Combustibles adjacent to walls ceilings roofs or metal partitions can be ignited by radiant or conducted heat Hot work permit should be obtained before operation to ensure supervisor s approval that adequate precautions have been taken After work is done check that area is free of sparks glowing embers and flames An empty container that held combustibles or that can produce flammable or toxic vapors when heated must never be welded on or cut unless container has first been cleaned in accordance with industry standards This includes a thorough steam or caustic cleaning or a solvent of water washing depending on the combustible s solubility followed by purging and inerting with nitrogen or carbon dioxide and using protective equipment Water filling just below working level may substitute for inerting A container with unknown contents should be cleaned see paragraph above Do NOT depend on sense of smell or sight to determine if it is safe to weld or cut Hollow castings or containers must be vented before welding or cutting They can explode Explosive atm
36. on that welding or cutting may produce Prevent them with adequate ventilation NEVER ventilate with oxygen Lead cadmium zinc mercury beryllium bearing and similar materials when welded or cut may produce harmful concentrations of toxic fumes Adequate local exhaust ventilation must be used or each person in the area as well as the operator must wear an air supplied respirator For beryllium both must be used Metals coated with or containing materials that emit toxic fumes should not be heated unless coating is removed form the work surface the area is well ventilated or the operator wears an air supplied respirator Work in a confined space only while it is being ventilated and if necessary while wearing an air supplied respirator Gas leaks in a confined space should be avoided Leaked gas in large quantities can change oxygen concentration dangerously Do not bring gas cylinders into a confined space Leaving confined space shut OFF gas supply at source to prevent possible accumulation of gases in the space if downstream valves have been accidentally opened or left open Check to be sure that the space is safe before reentering it Vapors from chlorinated solvents can be decomposed by the heat of the arc or flame to form PHOSGENE a highly toxic gas and other lung and eye irritating products The ultraviolet radiant energy of the arc can also decompose trichloroethylene and perchloroethylene va
37. ospheres NEVER weld or cut where the air may contain flammable dust gas or liquid vapors such as gasoline D Compressed Gas Equipment The safe handling of compressed gas equipment is detailed in numerous industry publications The following Cobra MX Lincoln Compatible T Owner s Manual Page i general rules cover many of the most common situations 1 Pressure Regulators Regulator relief valve is designed to protect only the regulator from overpressure it is not intended to protect any downstream equipment Provide such protection with one or more relief devices Never connect a regulator to a cylinder containing gas other than that for which the regulator was designed Remove faulty regulator from service immediately for repair first close cylinder valve The following symptoms indicate a faulty regulator Leaks if gas leaks externally Excessive Creep if delivery pressure continues to rise with downstream valve closed Faulty Gauge if gauge pointer does not move off stop pin when pressurized nor returns to stop pin after pressure release Repair Do NOT attempt repair Send faulty regulators for repair to manufacturer s designated repair center where special techniques and tools are used by trained personnel 2 Cylinders Cylinders must be handled carefully to prevent leaks and damage to their walls valves or safety devices Avoid electrical circuit contact with cylinders including
38. pors to form phosgene DO NOT WELD or cut where solvent vapors can be drawn into the welding or cutting atmosphere or where the radiant energy can penetrate to atmospheres containing even minute amounts of trichloroethylene or perchloroethylene C Fire and Explosion Prevention Causes of fire and explosion are combustibles reached by the arc flame flying sparks hot slag or heated material misuse of compressed gases and cylinders and short circuits BE AWARE THAT flying sparks or falling slag can pass through cracks along pipes through windows or doors and through wall or floor openings out of sight of the goggled operator Sparks can fly many feet To prevent fires and explosion Keep equipment clean and operable free of oil grease and in electrical parts of metallic particles that can cause short circuits If combustibles are in area do NOT weld or cut Move the work if practicable to an area free of combustibles Avoid paint spray rooms dip tanks storage areas ventilators If the work cannot be moved move combustibles at least 35 feet away out of reach of sparks and heat or protect against ignition with suitable and snug fitting fire resistant covers or shields Walls touching combustibles on opposite sides should not be welded on or cut Walls ceilings and floor near work should be protected by heat resistant covers or shields Fire watcher must be standing by with suitable fire extinguishi
39. shut off Use pressure charts available from your supplier for safe and efficient recommended pressure settings on regulators Check for leaks on first pressurization and regularly thereafter Brush with soap solution Bubbles indicate leaks Clean off soapy water after test dried soap is combustible E User Responsibilities Follow all Safety Rules Remove leaky or defective equipment from service immediately for repair Read and follow user manual instructions F Leaving Equipment Unattended Close gas supply at source and drain gas G Rope Staging Support Rope staging support should not be used for welding or cutting operation rope may burn 1 3 ARC WELDING Comply with precautions in 1 1 1 2 and this section Arc Welding properly done is asafe process but a careless operator invites trouble The equipment carries high currents at significant voltages The arc is very bright and hot Sparks fly fumes rise ultraviolet and infrared energy radiates weldments are hot and compressed gases may be used The wise operator avoids unnecessary risks and protects himself and others from accidents A Burn Protection Comply with precautions in 1 2 The welding arc is intense and visibly bright Its radiation can damage eyes penetrate lightweight clothing reflect from light colored surfaces and burn the skin and eyes Skin burns resemble Cobra MX Lincoln Compatible Owner s Manual Page ii acute su
40. t Screw Flat 1 4 20 5 16 SST 321 1104 Set Screw Conduit 411 0045 Cobra MX Lincoln Compatible Owner s Manual Page 15 Cobra MX Lincoln Compatible Rear Assembly Water Cooled P N 003 2398 A 2N APPLY SILICONE LUBRICANT TO O RING BEFORE INSTALLING A PTN ITEM NOT SHOWN FOR CLARITY Rear Body Assembly Water Cooled 003 2199 303 0096 O Ring 145 ID x 07 W 321 1104 Set Screw Conduit 411 0045 Tie Wrap not shown for clarity Cobra MX Lincoln Compatible Owner s Manual Page 16 Cobra MX Lincoln Compatible Classic Cup Barrel Assembly Air Cooled P N 003 2341 Apply silicone lubricant to item 3 before installing Classic Cup Barrel Assembly Air Cooled ER 001 0138 Assy Gas Cup MK 8 Ea 2 Notavalabie separately e 497 0209 insulation Bare s 991 0197 5PeceTefontimerPackage Cobra MX Lincoln Compatible IM Owner s Manual Page 17 Cobra MX Lincoln Compatible Classic Cup Barrel Assembly Water Cooled P N 003 2342 es Apply silicone lubricant to item 3 before installing Classic Cup Barrel Assembly Water Cooled EM 001 0138 _ Assy Gas Cup MK 8 EUN 2 Notavatabie separatey s 6 30005 O Ring 145 0 Pa 4370299 msustonBard s 991 0197 sPeceTefontimerPakage Cobra MX Lincoln Compatible Owner s Manual 18 Cobra MX Lincoln Compatible MAX Cup Barrel Assembly
41. the electric cable as it exits the back of the gun to prevent cable and or wire breakage The cabinet end has a seven pin W clocked amphenol connector Operation General The Cobra MX Lincoln Compatible gun maintains a constant steady uniform wire feed speed regardless of curved or looped wire conduit The constant push exerted by the slave motor in the cabinet combined with the pull of the gun motor causes the wire to literally float friction free through the wire conduit The 24VDC gun motor is controlled by a Trigger Sensitivity Adjustment three and three quarter 3 3 4 turn potentiometer in Screw Location the gun handle Controls and Settings Potentiometer The laterally positioned potentiometer is located in the lower end of the handle providing up to 800 ipm with 3 3 4 turns Micro Switch The micro switch assembly consists of the micro switch and leads Trigger Sensitivity The amount of trigger lever travel can be shortened for a quicker or more responsive action Screw adjusted out of trigger Amore sensitive trigger lever is produced by pre setting the micro switch reducing the gap between the trigger lever and the Ed iris motion micro switch lever By turning in the trigger sensitivity abii Cobra MX Lincoln Compatible 1 Owner s Manual Page 2 adjustment screw it closed the gap between the trigger lever and the micro switch lever This will enable the operator to increase the sensitivity of
42. the trigger lever Sensitivity Adjustment With the wire feeder turned on with or without welding wire loaded turn the screw in until the micro switch is activated Once activated the torch and wire feeder motors will begin feeding wire Retract the screw accordingly until the system is deactivated and adjusted to the operators liking Drive Roll and Idler Rolls General The Cobra MX Lincoln Compatible gun comes standard with a knurled drive roll and a grooved idler roll which will handle both hard wire and aluminum wire with diameters of 030 to 1 16 inch and steel from 030 to 045 inches Optional insulated V groove drive rolls are also available for aluminum wire if desired see optional kits Drive roll tension is accomplished with a unique spring loaded pressure screw The Cobra MX Lincoln Compatible comes from the factory with the pressure adjustment screw preset NO ADJUSTMENT IS REQUIRED FOR ALL SIZES AND TYPES OF WIRES Drive Roll Installation Removal Note Neither of the handles needs to be removed to access the drive or idler rolls Cam Lever 1 Pull the cam lever away from the idler roll This will relieve the pressure against the drive roll as shown in Figure 1 Figure 1 Align the drive roll removal tool P N 931 0100 over the flats of the drive roll as shown in Figure 2 Hold the gun with one hand or on a table top with the other hand give the removal tool a quick snap turn in the CLOCKWISE DIRECT
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