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5

Operation 

 

 

 

 

Caution : Before arc welding, read and understand all safety precautions and warnings . 

1.

 

If  using  non-flux  core  wire,  connect  and  secure  the  Argon/  CO

2   

gas  hose  to  the  rear  of  the  MIG 

welder.( If using flux core wire, protective gas is not required.) 

2.

 

Attach the Ground Cable with Clamp(29) as close as possible to the metal object to be welded, or to 

the metal work bench where the object is mounted and electrically connected. 

3.

 

Refer to the power setting table on the next page. Thinner metals use lower current. Heavier metals use 

higher current. 

4.

 

Verify  that  the  ON/OFF  Switch  is  in  the  OFF  position  ,  then  plug  the  MIG  welder  line  cord  into  a 

dedicated, 120VAC,20 amp line with delayed action type circuit breaker or fuses.   

5.

 

Momentarily  press  the Welding Torch  trigger  switch  to  test  the  wire  feed  speed. Adjust  the  speed by 

turning the Wire Speed Control Knob. 

6.

 

Orient yourself on the area to be welded , then hold the Arc Shaded Face Shield over your eyes. 

Warning: Never look at the ignited arc without , arc shaded, eye protection in a full face shield . Permanent 

eye damage or Blindness can occur. Skin burns can occur. Never breath arc fumes. 

7.

 

Press( and hold) the Torch Trigger Switch and stroke the area to be welded with the electrode wire to 

ignite the arc. 

Never  tap  the  electrode  wire  into  the  welding  surface  to  ignite  the  arc.  This  damages  its  external 

coating  on  the  electrode  which  prevents  oxygen  in  the  air  from  coming  into  contact  with  the  molten 

metal , causing it to oxidize. 

8.

 

Once  the  arc  is  ignited,  tilt  the  electrode  wire  forward  at  an  angle  of  about  35  degree.  Refer  to  the 

illustration at right. 

27 

29 

28 

 

21 

20 

 

18 

20 

 

Summary of Contents for MIG131L/1

Page 1: ...INDUSTRIAL MIG131L 1 WELDER ASSEMBLY AND OPERATING INSTRUCTIONS ...

Page 2: ...or which it was intended Do not use inappropriate attachments in an attempt to exceed the tool capacity 6 Use the right tool for the job Do not attempt to force a small tool or attachment to do the work of a larger industrial tool There are certain applications for which this tool was designed Do not modify this tool and do not use this tool for a purpose for which it was not intended 7 Dress prop...

Page 3: ...replacement parts Use of any other parts will void the warranty Only use accessories intended for use with this tool Approved accessories are available from Harbor Freight Tools 18 Do not operate tool if under the influence of alcohol or drugs Read warning labels on prescriptions to determine if your judgment or reflexes are impaired while taking drugs If there is any doubt do not operate the tool...

Page 4: ...nderstand this instruction manual as well as your employer s safety practices for arc welding 5 Connect only to a code approved power source Connect only to a grounding power source conforming to the National Electrical Code and Local Codes 6 Avoid fire ad explosion Remove flammable and explosive material from at least 35 feet from the welding arc to prevent welding sparks or molten metal from sta...

Page 5: ...Wire Feed Mechanism past the feed wheels c and into the Welding Torch Cable 27 It will help if the Welding Torch Cable 27 is straightened out as much as possible Push in until the wire comes out the Welding Torch head If it cannot be fed manually all the way out it can be fed automatically when the welding unit is powered up 6 Close the Feed Mechanism 14 over the wire and adjust the adjustment nut...

Page 6: ...er or fuses 5 Momentarily press the Welding Torch trigger switch to test the wire feed speed Adjust the speed by turning the Wire Speed Control Knob 6 Orient yourself on the area to be welded then hold the Arc Shaded Face Shield over your eyes Warning Never look at the ignited arc without arc shaded eye protection in a full face shield Permanent eye damage or Blindness can occur Skin burns can occ...

Page 7: ...e ON OFF Switch to the OFF position 10 Unplug the power line cord from the electrical outlet Maintenance Caution Before performing any maintenance on the MIG Welder unplug the power line cord from the electrical outlet 1 Periodically using compressed air open the top and side panels and blow out all dust from the interior 2 Store the unit in a clean and dry location 3 Periodically clean out the To...

Page 8: ...mer 6 Wire spool 26 Transformer carriage 7 Adjusting spring 27 Torch 8 Washer 28 Power cable 9 Adjusting nut 29 Ground cable 10 Pin 30 Wire spool axle 11 Handle socket 31 Connection Knobs 12 Handle 32 electrograph 13 Small side panel 33 PC Board 14 Wire feeder 15 Front panel a Cover of wheel 16 Lock cable b Rock handle 17 Copper liner c Feed wheel 18 Knob d Adjustment nut 19 Knob cover e Welding w...

Page 9: ...8 Welder Assembly Drawings ...

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