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TROUBLESHOOTING AND REPAIR

F-18

LN-7 GMA WIRE FEEDER

WIRE FEED SPEED POTENTIOMETER REPLACEMENT

ELECTRIC SHOCK
can kill.

• Observe all safety precautions detailed throughout this manual.

Turn off input power to the wire feeder. Only qualified technicians
should perform installations, maintenance, and troubleshooting
work on the machine.

TOOLS REQUIRED

5/16 in. wrench
Straight blade jeweler’s screwdriver
Adjustable wrench
Soldering iron and solder
Schematic Diagram for Troubleshooting, Figure G.4.

WARNING

COMPONENT REPLACEMENT PROCEDURES

Содержание LN-7 GMA

Страница 1: ...ge ne ral are a W ELDIN G SPARKS ca n ca use fire or ex plo sion Do no t we ld ne ar fla mm ab le ma ter ial Do no t we ld on co nta ine rs wh ich ha ve he ld fla mm ab le ma ter ial ARC RAYS ca n in...

Страница 2: ...h as sitting kneeling or lying if there is a high risk of unavoidable or accidental contact with the workpieceor ground use the following equipment Semiautomatic DC Constant Voltage Wire Welder DC Man...

Страница 3: ...ot possible cover them to prevent the welding sparks from starting a fire Remember that welding sparks and hot materials from welding or cutting can easily go through small cracks and openings to adja...

Страница 4: ...king near moving parts 7 f Do not put your hands near the engine fan Do not attempt to override the governor or idler by pushing on the throttle control rods while the engine is running 7 g To prevent...

Страница 5: ...l travaillant proximit au soudage l aide d crans appropri s et non inflammables 4 Des gouttes de laitier en fusion sont mises de l arc de soudage Se prot ger avec des v tements de protection libres de...

Страница 6: ...on Setting B 13 Wire Speed and Voltage Adjustment B 13 Making a Weld B 14 Wire Reel Changing B 14 Optional K416 Analog and K417 Digital Voltmeter Kits B 14 Flux Tank Loading B 15 Accessories Section C...

Страница 7: ...nections A 3 Work Cable A 21 Gun and Cable Assemblies A 21 Gun Cable Connections A 21 Water Connections for Water Cooled Guns A 22 Shielding Gas Hookup A 23 Section A TABLE OF CONTENTS INSTALLATION SE...

Страница 8: ...700 in per minute 1 90 to 17 8 m min LENGTH TOTAL WEIGHT LESS ELECTRODE 24 lbs 10 9 kg 0 023 in through 1 16 in 0 6 through 1 6 mm 0 045 in through 5 64 in 1 2 through 2 0 mm solid electrode cored ele...

Страница 9: ...diagrams in Figure A 3 through A 17 for the specific power source Table A 1 lists each figure number with its corresponding power source INSTALLATION A 3 LN 7 GMA WIRE FEEDER WARNING Figure Power Sour...

Страница 10: ...ources without an internal output contactor and requiring a K240 Contactor Kit see Figure A 13 3 If input cables longer than the standard length must be used K292 extension cables 50 ft 15 2 m can be...

Страница 11: ...nput control cable polarized Amphenol plug into the mating 6 pin receptacle on the rear of the control section 6 Referring to Figure A 2 install the input cable under the wire reel mounting stand stra...

Страница 12: ...to Master TOC Return to Master TOC Return to Master TOC INSTALLATION FIGURE A 3 LN 7 GMA TO DC 400 DC 250 AND CV CVI POWER SOURCES WITH TERMINAL STRIP CONNECTION DIAGRAM LN 7 GMA WIRE FEEDER 77 CLEVE...

Страница 13: ...n to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC LN 7 GMA WIRE FEEDER INSTALLATION A 7 FIGURE A 4 LN 7 GMA TO PULSED POWER 500 CONNECTION DIAGRAM CLEVELAND OHIO U S A ELE...

Страница 14: ...eturn to Master TOC Return to Master TOC Return to Master TOC INSTALLATION FIGURE A 5 LN 7 GMA TO CV CVI POWER SOURCES WITH 14 PIN AMPHENOL CONNECTOR CONNECTION DIAGRAM LN 7 GMA WIRE FEEDER ELECTRIC S...

Страница 15: ...N 7 GMA WIRE FEEDER FIGURE A 6 LN 7 GMA TO CV CVI POWER SOURCES WITH TWIST MATE CONNECTOR AND 14 PIN AMPHENOL REMOTE CONTROL CONNECTION DIAGRAM CLEVELAND OHIO U S A ELECTRIC SHOCK CAN KILL TURN OFF IN...

Страница 16: ...ster TOC Return to Master TOC Return to Master TOC Return to Master TOC INSTALLATION A 10 FIGURE A 7 LN 7 GMA TO CV CVI POWER SOURCE K867 K775 CONNECTION DIAGRAM CLEVELAND OHIO U S A ELECTRIC SHOCK CA...

Страница 17: ...to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FIGURE A 8 LN 7 GMA TO R3S 250 OR R3S 325 CONNECTION DIAGRAM CLEVELAND OHIO U S A ELECTRIC SHOCK CAN KILL TURN INPUT POWER...

Страница 18: ...r TOC Return to Master TOC Return to Master TOC Return to Master TOC INSTALLATION A 12 FIGURE A 9 LN 7 GMA TO SAM MOTOR GENERATOR OR ENGINE WELDER CONNECTION DIAGRAM CLEVELAND OHIO U S A ELECTRIC SHOC...

Страница 19: ...eturn to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FIGURE A 10 LN 7 GMA TO DC 600 CONNECTION DIAGRAM CLEVELAND OHIO U S A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF B...

Страница 20: ...to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INSTALLATION A 14 FIGURE A 11 LN 7 GMA TO R3S 400 600 OR 800 CONNECTION DIAGRAM CLEVELAND OHIO U S A ELECTRIC SHOCK CAN KIL...

Страница 21: ...er TOC Return to Master TOC Return to Master TOC Return to Master TOC FIGURE A 12 LN 7 GMA TO MOST LINCOLN MOTOR GENERATORS CONNECTION DIAGRAM 32 CLEVELAND OHIO U S A ELECTRIC SHOCK CAN KILL TURN INPU...

Страница 22: ...N 7 GMA WIRE FEEDER WARNING LN 7 GMA TO WP250 G9 PRO ANY INCREASE OF THE HIGH IDLE ENGINE RPM BY CHANGING THE GOVERNOR SETTING OR OVERRIDING THE THROTTLE LINKAGE WILL CAUSE AN INCREASE IN THE AC AUXIL...

Страница 23: ...A TO RANGER 9 CONNECTION DIAGRAM INSTALLATION A 17 LN 7 GMA WIRE FEEDER ELECTRIC SHOCK CAN KILL DO NOT OPERATE WITH PANELS OPEN DISCONNECT NEGATIVE BATTERY LEAD BEFORE SERVICING DO NOT TOUCH ELECTRICA...

Страница 24: ...INSTALLATION A 18 FIGURE A 15 LN 7 GMA TO RANGER 10 LX CONNECTION DIAGRAM ELECTRIC SHOCK CAN KILL DO NOT OPERATE WITH PANELS OPEN DISCONNECT NEGATIVE BATTERY LEAD BEFORE SERVICING DO NOT TOUCH ELECTRI...

Страница 25: ...TOC Return to Master TOC Return to Master TOC Return to Master TOC FIGURE A 16 LN 7 GMA TO POWER SOURCES WITH NO OUTPUT CONTACTOR CONNECTION DIAGRAM CLEVELAND OHIO U S A ELECTRIC SHOCK CAN KILL TURN I...

Страница 26: ...turn to Master TOC Return to Master TOC Return to Master TOC INSTALLATION A 20 FIGURE A 17 LN 7 GMA TO POWER SOURCES WITH CONTACTOR AND NO TERMINAL STRIP CONNECTION DIAGRAM CLEVELAND OHIO U S A ELECTR...

Страница 27: ...be used with several guns In most cases Lincoln guns and cables are shipped assembled ready to weld Use the gun and cable assembly for the electrode type solid Outershield or Innershield and electrode...

Страница 28: ...is not designed for use with a waterline solenoid valve you may remove the solenoid and screw the male fitting after applying sealant directly into the brass manifold block 1 Using male 5 8 18 UNF le...

Страница 29: ...valve and a hose from the flow valve to the gas inlet fitting of the LN 7 GMA or the K494 Gas Solenoid Valve Kit installed on the LN 7 GMA Install per Figure A 20 and the following 1 Connect the supp...

Страница 30: ...turn to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC A 24 NOTES LN 7 GMA WIRE FEEDE...

Страница 31: ...B 8 Wire Loading B 9 Wire Reel Loading Readi Reels and Spools B 9 Wire Reel Loading 50 and 60 lb Coils B 11 Wire Loading 13 14 lb Innershield Coils B 12 Acceleration Setting B 13 Wire Speed and Volta...

Страница 32: ...pen arc welding It has been factory assembled with the following features Calibrated wire feed dial 75 to 700 in min 1 9 to 17 8 m min Factory installed gas solenoid valve and gas fittings Wire drive...

Страница 33: ...id valve is energized immediately when the gun trigger is closed but the time delay before the wire feeder is energized is adjustable from 0 to 1 5 seconds Turn the knob to the left for shorter delays...

Страница 34: ...he ground lead which will falsely activate the GLP circuit To reset the GLP circuit press the red button above the drive rolls and to the left of the circuit breaker DRIVE ROLL INSTALLATION CHANGING D...

Страница 35: ...Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC LN 7 GMA WIRE FEEDER OPERATION B 5 FIGURE B 2 INSTALLING DR...

Страница 36: ...roll onto either output shaft using the drive key clamping collar and hex head screw Certain size drive rolls consist of two roll halves and may contain a spacer If the drive roll you are installing c...

Страница 37: ...eturn to Master TOC Return to Master TOC LN 7 GMA WIRE FEEDER OPERATION B 7 FIGURE B 3 INSTALLING DRIVE ROLLS ON A FOUR ROLL FEEDER CLAMPING COLLAR SPACER IF REQUIRED DRIVE ROLL HALVES KEY OUTPUT SHAF...

Страница 38: ...wire birdnests jams or breaks at the drive roll the idle roll pressure is set too high Back the pressure adjustment knob Figure B 4 out 1 2 turn Run new wire through the gun and repeat step 1 3 If th...

Страница 39: ...e coil 4 Set one of the Readi Reel inside cage wires on the slot in the retaining spring tab 5 Lower the Read Reel to depress the retaining spring and align the other inside cage wires with the groove...

Страница 40: ...DE FEEDING AND BRAKE ADJUSTMENT 1 Turn the Readi Reel or spool until the free end of the electrode is accessible 2 While tightly holding the electrode cut off the bent end and straighten the first six...

Страница 41: ...tates clockwise DO NOT cut the tie wires at this time 4 Be sure the coil is placed so the spring loaded arms will not interfere with the later removal of the coil tie wires 5 When loading 0 030 0 035...

Страница 42: ...LS The K378 small mounting stand for the 14 lb Innershield coil does not have an adjustable brake It has a fixed drag built into the reel spindle To load a 14 lb coil 1 Remove the snap on lid from the...

Страница 43: ...ches only circuit 1 is used Set circuit 1 in the F position for fast acceleration or in the S position for slow acceleration See Figure B 7 FIGURE B 7 ACCELERATION SETTING LATER CONTROL PC BOARDS WIRE...

Страница 44: ...ifficult to pull it back through the nozzle 2 Uncouple the gun conductor cable from the conductor block on the wire feeder drive unit and lay the gun cable out straight 3 Using pliers grip the wire an...

Страница 45: ...k This is an automatic disposal system in case the plant air has water and dirt in it K310 FLUX SCREEN OPTIONAL The unit was designed to fit the top of either the standard fill funnel or a K58 magneti...

Страница 46: ...turn to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC B 16 NOTES LN 7 GMA WIRE FEEDE...

Страница 47: ...Mounting Stand for Readi Reel Coils or 10 to 30 lb Spools with 2 in I D C 5 K378 Small Mounting Stand for 13 to 14 Lb Innershield Coils C 5 K292 Power Input Extension Cable 600 Amps C 5 Power Input Ca...

Страница 48: ...t K320 Flux tank K376 K303 50 60 lb Wire reel mounting stand S 14543 Wire reel dust shield for K376 M 11514 Wire reel dust shield door for K303 K376 K377 Mounting stand for Readi Reels and 10 30 lb sp...

Страница 49: ...on The original K162 spindle has a black spacer and the part no M14587 Parts may not be exchanged from one design to the other Do not use coils or spools heavier than 30 lbs on the original K162 spin...

Страница 50: ...log meter and a polarity switch It mounts in the hinged wire drive section cover Installation instructions M15080 are included with the kit K417 DIGITAL VOLTMETER KIT Includes a three digit LED displa...

Страница 51: ...ystem See Attaching the Wire Reel Stand procedure at the end of this section for installation procedures K378 SMALL MOUNTING STAND FOR 13 TO 14 LB INNERSHIELD COILS This assembly includes the same sma...

Страница 52: ...and cable assembly is recommended for most welding with 0 062 in through 3 32 in Innershield electrodes at up to 350 amps Install the insulated nozzle extension or thread protector and the nozzle con...

Страница 53: ...re feeder K527 WATER SOLENOID KIT Install and connect per the instructions M16261 shipped with the kit This kit is factory installed on the K440 1 LN 7 GMA K376 AND K303 50 TO 60 LB WIRE REEL MOUNTING...

Страница 54: ...eturn to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC NOTES C 8 LN 7 GMA WIRE FEEDE...

Страница 55: ...es D 2 Wire Reel Mounting D 2 Periodic Maintenance D 2 Wire Drive Motor and Gearbox D 2 Gun and Cable Maintenance D 2 Section D TABLE OF CONTENTS MAINTENANCE SECTION LN 7 GMA WIRE FEEDER Return to Mas...

Страница 56: ...instructions included with the drive roll kit for installation and replacement of the drive rolls on the wire feeder WIRE REEL MOUNTING To prolong the life of the reel shaft on the 50 to 60 lb coils...

Страница 57: ...Relay Circuit E 4 Auxiliary Circuits E 5 Protective Circuits E 6 Overload Protection E 6 Current Limiting Circuit E 6 Ground Lead Protection E 7 SCR Operation E 7 Section E TABLE OF CONTENTS THEORY O...

Страница 58: ...gure E 1 THEORY OF OPERATION LN 7 GMA WIRE FEEDER FIGURE E 1 INPUT LINE VOLTAGE AND TRIGGER TRANSFORMER TRIGGER TRANS FORMER 24 VAC 8 8 VAC 115 VAC 115 VAC CIRCUIT BREAKER OPTIONAL METER KIT OPTIONAL...

Страница 59: ...s in the relay close and energize the multiple functions of the wire feeder See Figure E 2 THEORY OF OPERATION E 3 LN 7 GMA WIRE FEEDER FIGURE E 2 TRIGGER CIRCUIT TRIGGER TRANS FORMER 24 VAC 8 8 VAC 1...

Страница 60: ...er the speed setting the higher the voltage that is applied to the wire drive motor The gearbox transfers the power of the rotating motor to the drive roll On a four roll wire feeder the gearbox also...

Страница 61: ...METER KITS The optional meter kit indicates the welding voltage from the electrode to the work This voltage is measured from the contact block in the wire drive compartment to the work While the analo...

Страница 62: ...eaker will trip to prevent any damage to the wire feeder CURRENT LIMITING CIRCUIT The current limiting circuit limits the current that is sent to the feed motor A precision resistor in line with the f...

Страница 63: ...applied to the SCR it is turned on and there is current flow from anode to cathode In the on state the SCR acts like a closed switch When the SCR is turned off there is no current flow thus the devic...

Страница 64: ...eturn to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC NOTES LN 7 GMA WIRE FEEDER E...

Страница 65: ...istor R1 Replacement F 32 Control Relay Replacement F 35 Wire Drive Assembly and Components Replacement F 37 Swing Arm Assembly Replacement for Two Roll Wire Feeders F 41 Swing Arm Assembly Replacemen...

Страница 66: ...may exhibit Find the listing that best describes the symptom that the machine is exhibiting Symptoms are grouped according to functional problems and wire feeding problems Step 2 PERFORM EXTERNAL TEST...

Страница 67: ...ng bag and place it directly into the equipment Don t set the P C Board on or near paper plastic or cloth which could have a static charge If the P C Board can t be installed immediately put it back i...

Страница 68: ...nplug J104 from the control PC board and install the jumper plug See wiring diagram If the problem is solved then the timer or burnback kit may be defective RECOMMENDED COURSE OF ACTION 1 Check for th...

Страница 69: ...re speed setting 2 If the correct armature voltage IS present at leads 539 and 541 and the drive motor is NOT turning then the drive motor may be defective Also check the brushes in the drive motor re...

Страница 70: ...COMMENDED COURSE OF ACTION 1 Jumper the trigger leads at the power source Either 2 to 4 if on a terminal strip or C to D if on a 14 pin amphenol type connector If the power source produces the correct...

Страница 71: ...un trigger is pulled check for the presence of 115 VAC at leads 7 and 32A If 115 VAC is present and the gas solenoid does not activate then the solenoid may be defective Replace per Gas Solenoid and C...

Страница 72: ...ACTION 1 Check the resistance of the potentiometer over the entire range of travel The potentio meter should adjust from 0 to 10K Ohms If adjustment is not smooth and linear replace per Wire Feed Spe...

Страница 73: ...ent procedure 3 If the gearbox is OK and the motor current draw IS excessive then the motor or motor brushes may be defective Check or replace 4 If motor current draw is NOT excessive disconnect gas s...

Страница 74: ...shielding gas is correct and flow is proper 3 Make sure the weld joint is not contaminated RECOMMENDED COURSE OF ACTION 1 Check for correct size and installation of drive rolls and guide tubes Refer...

Страница 75: ...faulty Check the resistance of the potentiometer over the entire range of travel The potentio meter should adjust from 0 to 10K Ohms If adjustment is not smooth and linear replace per Wire Feed Speed...

Страница 76: ...ur safety and to avoid electrical shock please observe all safety notes and precautions detailed throughout this manual If for any reason you do not understand the test procedures or are unable to per...

Страница 77: ...rminals Energized De energized 7 1 Open Closed 7 4 Closed Open 8 2 Open Closed 8 5 Closed Open 9 3 Open Closed 9 6 Closed Open 4 Measure resistance across the contacts A resistance of less than one Oh...

Страница 78: ...y warranty For your safety and to avoid electrical shock please observe all safety notes and precautions detailed throughout this manual If for any reason you do not understand the test procedures or...

Страница 79: ...ary voltages are given for a primary voltage of 115 VAC The transformer secondary voltage will vary if the primary voltage varies 4 Measure the voltage across pins 4 and 5 of the transformer plug The...

Страница 80: ...warranty For your safety and to avoid electrical shock please observe all safety notes and precautions detailed throughout this manual If for any reason you do not understand the test procedures or a...

Страница 81: ...nd to the terminal connectors or amphenol plug on the welding power source end Refer to the Wiring Diagrams in Section G Table F 2 and Figure F 3 for wire designations 3 If the conductor resistance me...

Страница 82: ...TER REPLACEMENT ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to the wire feeder Only qualified technicians should perform installations m...

Страница 83: ...n screws from the top and side of the unit See Figure F 4 2 Loosen the setscrew on the potentiometer knob and remove the knob from the potentiometer 3 Remove the nut and lockwasher holding the potenti...

Страница 84: ...he lockwasher and nut on the potentiometer Tighten until snug 7 Install the knob onto the potentiometer and tighten the setscrew to lock the knob in place 8 Reinstall the cover onto the control box us...

Страница 85: ...TROUBLESHOOTING AND REPAIR F 21 LN 7 GMA WIRE FEEDER CIRCUIT BREAKER REPLACEMENT ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to the wire...

Страница 86: ...it breaker See Figure F 5 3 Remove the retaining nut that secures the circuit breaker to the panel of the wire feeder Remove the circuit breaker from the wire feeder 4 Install the new circuit breaker...

Страница 87: ...R F 23 GROUND LEAD PROTECTOR PUSH BUTTON SWITCH REPLACEMENT ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to the wire feeder Only qualifie...

Страница 88: ...g nut from the front of the push button and remove the push button from the control box See Figure F 5 3 Unsolder the two leads from the back of the push button 4 Solder the two leads onto the new pus...

Страница 89: ...UBLESHOOTING AND REPAIR LN 7 GMA WIRE FEEDER F 25 TRIGGER TRANSFORMER REPLACEMENT ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to the wir...

Страница 90: ...ansformer wire connector from the control PC board See Figure F 6 3 Remove the two phillips head screws that attach the transformer to the case of the control box Remove the old transformer from the w...

Страница 91: ...PROTECTOR REED SWITCH REPLACEMENT ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to the wire feeder Only qualified technicians should perf...

Страница 92: ...Figure F 7 3 Cut the two tie wraps that attach the reed switch to the case of the wire feeder and the tie wrap that attaches the reed switch leads to the main wire harness 4 Slide the reed switch out...

Страница 93: ...TOC LN 7 GMA WIRE FEEDER TROUBLESHOOTING AND REPAIR F 29 CONTROL PC BOARD REPLACEMENT ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to th...

Страница 94: ...ving the four 5 16 in screws from the top and side of the unit Label all wires and connectors prior to removal All wires and connectors must be reconnected to the same terminals from which they were r...

Страница 95: ...snaps onto all seven supports Do not use excessive force when inserting control relay Excessive force can damage the control PC board If the control relay does not fit remove it and try again 12 Insta...

Страница 96: ...FEEDER TROUBLESHOOTING AND REPAIR F 32 MAIN POWER RESISTOR R1 REPLACEMENT ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to the wire feeder...

Страница 97: ...ped with a meter kit remove the meter cable strap from the resistor mounting bolt 4 Remove the second washer hex nut and third washer from the resistor mounting bolt 5 Remove the two insulating spacer...

Страница 98: ...ne insulating spacer onto the resistor mounting bolt Install the power resistor and the second spacer onto the mounting bolt Secure in place with a flat washer and hex nut 9 If the wire feeder is equi...

Страница 99: ...aster TOC LN 7 GMA WIRE FEEDER TROUBLESHOOTING AND REPAIR F 35 CONTROL RELAY REPLACEMENT ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to...

Страница 100: ...e top and side of the unit 2 Slide the retaining clip off the side of the control relay See Figure F 11 3 Remove the control relay by pulling out wile gently rocking from side to side Do not use exces...

Страница 101: ...ll safety precautions detailed throughout this manual Turn off input power to the wire feeder Only qualified technicians should perform installations maintenance and troubleshooting work on the machin...

Страница 102: ...hree motor leads through the case of the control box to the wire drive compartment 4 Remove the swing arm assembly per the Swing Arm Assembly Replacement procedure 5 Remove the hex head bolt in the bo...

Страница 103: ...hers in the bottom of the gearbox 17 Coat the sealing surfaces of the gearbox covers with sealant part no E2225 and install the covers on the gearbox Secure in place with two hex head screws and lockw...

Страница 104: ...MBLY AND COMPONENTS REPLACEMENT continued TROUBLESHOOTING AND REPAIR F 40 LN 7 GMA WIRE FEEDER FIGURE F 13 WIRE DRIVE ASSEMBLY REMOVAL FOUR ROLL FEEDER MOTOR ROLL PIN PINION GEAR MOTOR INSULATOR GEARB...

Страница 105: ...R TROUBLESHOOTING AND REPAIR F 41 SWING ARM ASSEMBLY REPLACEMENT FOR TWO ROLL WIRE FEEDERS ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power t...

Страница 106: ...r from the swing arm 3 Pry the speed clip off of the groove pin and lift the idle roll assembly from groove pin 4 Remove the two screws that hold the idle roller in the idle roll assembly Remove the i...

Страница 107: ...idle roll assembly into the groove pin Secure in place with a speed clip 7 Slide the pivot pin into the swing arm assembly Place the flat washer and swing arm assembly on the gearbox assembly Fasten...

Страница 108: ...F 44 LN 7 GMA WIRE FEEDER SWING ARM ASSEMBLY REPLACEMENT FOR FOUR ROLL WIRE FEEDERS ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to the...

Страница 109: ...pull the two swing arms out of the wire drive compartment Ensure that the two spacers are not lost 4 Remove the two socket head cap screws and flat washers from the swing arm assembly Remove the idle...

Страница 110: ...o swing arms and spacers in the center post of the wire drive assembly Ensure the holes in the pieces line up to accept the hinge pin Do not use excessive force when installing the hinge pin If hinge...

Страница 111: ...OCK can kill Observe all safety precautions detailed throughout this manual Turn off input power to the wire feeder Only qualified technicians should perform installations maintenance and troubleshoot...

Страница 112: ...o Master TOC Return to Master TOC LN 7 GMA WIRE FEEDER TROUBLESHOOTING AND REPAIR F 48 GAS SOLENOID AND CONNECTIONS REPLACEMENT continued FIGURE F 16 GAS SOLENOID DISASSEMBLY GAS OUTLET FITTING RETAIN...

Страница 113: ...solenoid from the solenoid mounting plate by removing the two phillips head screws from the bottom of the mounting plate 8 Remove the tubing from the gas and solenoid outlet fittings A knife may be r...

Страница 114: ...part which could affect the machine s electrical characteristics must be replaced or if any electrical components are repaired or replaced the machine must be retested and meet the following standards...

Страница 115: ...ms Codes 9168 and 9386 G 3 Codes 9643 and 9796 4R G 4 Codes 9928 and 9931 4R G 5 Schematic Diagram Control PC Board G 6 Section G TABLE OF CONTENTS ELECTRICAL DIAGRAMS SECTION LN 7 GMA WIRE FEEDER Ret...

Страница 116: ...on is provided for reference only Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator...

Страница 117: ...104 PC BD PLUG ASBLY OCI101 OPTOCOUPLER PHOTO Q 70V CNY17 3 PT101 TRANSFORMER PULSE 3 WINDING 1 1 1 Q101 TRANSISTOR N T225 0 5A 250V 2N5655R126 Q102 TRANSISTOR N T226 0 5A 300V MPS A42 Q103 TRANSISTOR...

Страница 118: ...R I G G E R T R A N S F O R M E R N A H I R 4 0 L O W R 3 7 F S N D L N 7 G M A C O N T R O L P C B O A R D N A Q U I C K C O N N E C T T E R M I N A L S 7 T O G A S S O L E N O I D V A L V E 1 1 5 V...

Страница 119: ...F O R M E R N A H I R 4 0 L O W R 3 7 F S N D N A Q U I C K C O N N E C T T E R M I N A L S 7 3 2 A N B M E T E R K I T R E C E P T A C L E N C O P T I O N A L G M A T I M E R O R N E A C T I V A T E...

Страница 120: ...E R O R W 5 3 9 5 4 1 B N B J 6 G U N C O N T R O L C A B L E C O N N E C T O R C A V I T Y N U M B E R I N G S E Q U E N C E C O M P O N E N T S I D E O F B O A R D L E A D C O L O R C O D I N G B B...

Страница 121: ...CEMF WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD THIS DIAGRAM MAY N B CR2 GLP REED SWITCH ACTUATED BY GROUND CURRENT 2N5655 Q101 150K R114 10K R115 D113 2W 2 2K R113 B541 1 2 OPTOCOUP...

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