Chicago Electric 6271 User manual

DUAL MIG WELDER 151DUAL MIG WELDER 151

DUAL MIG WELDER 151

ASSEMBLY AND OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

this manual or any artwork contained herein may be reproduced in any shape or

form without the express written consent of Harbor Freight Tools.

For technical questions and replacement parts, please call 1-800-444-3353

55250

Page 2SKU 55250 For technical questions, please call 1-800-444-3353.

Specifications

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Save This Manual

You will need the manual for the safety warnings and precautions, assembly instructions,

operating and maintenance procedures, parts list and diagram. Keep your invoice with this

manual. Write the invoice number on the inside of the front cover. Keep the manual and

invoice in a safe and dry place for future reference.

Safety Warnings and Precautions

WARNING: When using tool, basic safety precautions should always be followed to

reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tool!

1. Keep work area clean. Cluttered areas invite injuries.

2. Observe work area conditions. Do not use machines or power tools in damp or wet

locations. Don’t expose to rain. Keep work area well lighted. Do not use electrically

powered tools in the presence of flammable gases or liquids.

3. Keep children away. Children must never be allowed in the work area. Do not let them

handle machines, tools, or extension cords.

Page 3SKU 55250 For technical questions, please call 1-800-444-3353.

4. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit

rust. Always lock up tools and keep out of reach of children.

5. Do not force tool. It will do the job better and more safely at the rate for 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 properly. Do not wear loose clothing or jewelry as they can be caught in moving

parts. Protective, electrically nonconductive clothes and nonskid footwear are

recommended when working. Wear restrictive hair covering to contain long hair.

8. Use protective gear. Always wear ANSI approved, arc shaded, impact safety full face

shield when arc welding.Wear an ANSI approved dust mask or respirator when working

around metal, chemical dusts, fumes and mists. Always wear ANSI approved welding

gear: leather gloves, leather apron, and shoes.

9. Do not overreach. Keep proper footing and balance at all times. Do not reach over or

across running machines.

10. Maintain tools with care. Keep tools sharp and clean for better and safer performance.

Follow instructions for lubricating and changing accessories.Inspect tool cords periodically

and, if damaged, have them repaired by an authorized technician. The handles must be

kept clean, dry, and free from oil and grease at all times.

11. Disconnect power. Unplug tool when not in use.

12. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are

removed from the tool or machine work surface before plugging it in.

13. Avoid unintentional starting. Be sure the switch is in the Off position when not in use

and before plugging in. Do not carry any tool with your finger on the trigger, whether it is

plugged in or not.

14. Stay alert. Watch what you are doing, use common sense. Do not operate any tool

when you are tired.

15. Check for damaged parts. Before using any tool, any part that appears damaged

should be carefully checked to determine that it will operate properly and perform its

intended function. Check for alignment and binding of moving parts; any broken parts or

mounting fixtures; and any other condition that may affect proper operation. Any part

that is damaged should be properly repaired or replaced by a qualified technician. Do

not use the tool if any switch does not turn On and Off properly.

16. Guard against electric shock. Prevent body contact with grounded surfaces such as

pipes, radiators, ranges, and refrigerator enclosures.

17. Replacement parts and accessories. When servicing, use only identical 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 4SKU 55250 For technical questions, please call 1-800-444-3353.

Arc Welding Safety Warnings and Precautions

1. Avoid electrical shock. Do not permit electrically live parts, cables, or electrodes to

contact skin, clothing, or gloves. Protective clothing should be free of holes, dry, and

ANSI approved.

This unit draws enough current to cause serious injury or death. Before turning the

welder on, check the electrode holder to be sure that there are no protruding screw

heads, and that all insulation is secure. Do not weld unless you are insulated from ground

and the work piece.

2. Avoid breathing fumes or gases. They can cause serious health problems. Use an

active ventilation system directly above the welding area. Keep your head out of the

fumes.

3. Avoid eye and body damage. Arc rays and infrared radiation can injure eyes and burn

skin. Wear ANSI approved eye and body protection. Do not allow viewing by visitors

without proper eye and body protection. Use a Face Shield with arc shaded filter plate.

4. Know proper arc welding practices. Read and understand this instruction manual,

and well as your employer’s safety practices for arc welding.

5. Avoid fire and explosion. Remove flammable and explosive material from at least 35

feet from the welding arc to prevent welding sparks or molten metal from starting a fire.

Keep a type ABC fire extinguisher within easy reach. Thoroughly clean the object being

welded of any paint, grease, or other foreign material.

6. This product, when used for welding and similar applications, produces chemicals known

to the State of California to cause cancer and birth defects (or other reproductive harm).

(California Health & Safety Code § 25249.5,

et seq.

)

19. Maintenance. For your safety, service and maintenance should be performed regularly

by a qualified technician.

20. Use proper size and type extension cord. If an extension cord is required, it must be

of the proper size and type to supply the correct current to the tool without heating up.

Otherwise, the extension cord could melt and catch fire, or cause electrical damage to

the tool. This tool requires use of an 220 VAC extension cord of 20 amps minimum

capability (up to 30 feet), with wire size rated at 10 AWG.Longer extension cords require

larger size wire. If you are using the tool outdoors, use an extension cord rated for

outdoor use (signified by “WA” on the jacket).

21. Pacemaker safety warning. People with pacemakers should consult with their

physician(s) before using this product; operation of equipment in close proximity to a

heart pacemaker could cause interference or failure of the pacemaker.

Note: Performance of this tool may vary depending on variations in local line voltage. Exten-

sion cord usage may also affect tool performance.

Warning:The warnings, cautions, and instructions discussed in this instruction manual

cannot cover all possible conditions and situations that may occur. It must be under-

stood by the operator that common sense and caution are factors which cannot be

built into this product, but must be supplied by the operator.

Page 5SKU 55250 For technical questions, please call 1-800-444-3353.

Unpacking

When unpacking, check to make sure the following parts are included.

If any parts are missing or broken, please call Harbor Freight Tools at the number on the

cover of this manual as soon as possible.

Brush Hammer

Handheld Shaded

Face Shield

Wheels (29)

Axle (30)

Welding Torch (16)

Grounding Cable

with Clamp (15)

Line Cord (14)

Handle (4)

Wire Spool not shown

7. Connect only to a code approved power source. Connect only to a grounding power

source conforming to the National Electrical Code and Local Codes.

8. Wear proper clothing when welding. Use flameproof, welding-type gloves. Wear

cuffless pants and pocketless shirt. Both must be free of oil and grease. Wear high-

topped, safety shoes with rubber soles.

Page 6SKU 55250 For technical questions, please call 1-800-444-3353.

Assembly

MIGWelder Unit

1. Assemble the Axle (30) and Wheels (29) as illustrated in the Wheel Assembly Drawing

at the end of this manual.

2. Place the second wheel over the end of the Axle and secure in place with the Axle

locking clip.

3. Insert the Handle (4) into the Handle Sockets (3) and mount the Handle Sockets to

the Side Panel B (1) top using supplied hardware.

Note: The Handle (4) configuration may differ slightly than what is shown in this manual.

4. Lift Side Panel B (1) all the way to expose the wire spool and Wire Feed Mechanism

(11).

5. Remove the Nut from the Wire Spool Axle (10). Place the Wire Spool over the Axle

with the wire exiting the spool over the top. Refer to photos above. Replace the Spool

Axle Nut.

6. Open the Wire Feed Mechanism (11) as shown in the photo (top-right).

7. Feed and guide the spool wire into the Wire Feed Mechanism, past the feed wheels

(C), and into the Welding Torch / Cable (16).

It will help if the Welding Torch / Cable (16) 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.

8. Close the Feed Mechanism (11) over the wire, and adjust the feed tension (D) if

necessary.

9. Check that +/– cables to connection Knobs (34) are correct. See photo (top-left).

When using non-flux wire and protective gas, connect wire cables as shown in photo.

For flux cored wire, no gas is required. Reverse cable connections.

10. Close the Side Panel B (1).

Wire Feed Mechanism (11)

Wire Spool

Wire Spool Axle (10)

Side Panel B (1)

(C)

(D)

(34)

–

Page 7SKU 55250 For technical questions, please call 1-800-444-3353.

Operation

Controls and Indicators

Welding

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

listed on pages 2 through 5.

1. If using non-flux core wire, connect and secure the Argon/CO2

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 (15) 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. Set the desired welding current (30~120 amps) for the type of metal being welded

using the Min/Max Switch and 1/2 Power Level Switch.

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, 220 VAC, 20 amp line with delayed action type circuit breaker

11. A licensed electrician must connect a 220 V~ plug (not supplied) to the line cord.

Green wire = ground; Black wire = hot (110 V~, Leg 1);White wire = hot (110 V~, Leg 2)

Handheld Shaded Face Shield

Assemble the Handheld Shaded Face Shield as illustrated in its Assembly Drawing at the

end of this manual.

On / Off Switch

Min / Max Switch

1 / 2 Power Level Switch

Overload-shutdown

Indicator Lamp

Wire Feed Speed Control

Line Cord

Ground Cable with Clamp (15) Welding Torch Cable (16)

Page 8SKU 55250 For technical questions, please call 1-800-444-3353.

or fuses. If an extension cord is used, it must have the following wire size: up to 30 feet,

use 10 AWG size wire; 30 to 50 feet, 8 AWG wire; Over 50 feet, 6 AWG wire.

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5. While holding the Welding Torch handle, with the electrode wire clearly out of the way

of any grounded objects, turn the On/Off Switch to the ON position.

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

Adjust the speed by turning the Wire Feed Speed Control knob.

7. 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 ANSI approved, arc shaded, eye protec-

tion in a full face shield. Permanent eye damage or blindness can occur. Skin burns can

occur. Never breath arc fumes.

8. 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.

9. Once the arc is ignited, tilt the electrode wire forward at an

angle of about 35°. Refer to the illustration at right.

The wire feeds automatically at a speed dependent on the

Min. or Max. current setting.The wire speed can also be

adjusted using the Wire Feed Speed Control.

Note: If too much current is drawn from the MIG Welder, the Thermal Overload protector will

activate, the red Overload indicator will light, and the Arc Welder will turn off until it cools down.

If this happens, turn the On/Off Switch to the OFF position and wait about 3 ~ 5 minutes.

10. When the weld is complete, lift the Welding Torch handle electrode wire clearly away

from any grounded object, remove your Face Shield, and turn the On/Off Switch to the

OFF position.

11. Unplug the power Line Cord from the electrical outlet.

Page 9SKU 55250 For technical questions, please call 1-800-444-3353.

Troubleshooting

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Maintenance

Caution: Before performing any maintenance on the MIGWelder, 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.

Page 10SKU 55250 For technical questions, please call 1-800-444-3353.

NOTE: Some parts are listed and shown for illustration purposes only and are not available

individually as replacement parts.

PLEASE READ THE FOLLOWING CAREFULLY

THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS

MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-

TOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT

HE OR SHE IS QUALIFIEDTO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE

IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER

AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACE-

MENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT

BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR

HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARIS-

ING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.

Parts List

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2. Store the unit in a clean and dry location.

3. Periodically clean out the Torch Head.

Replacing the Wire Reel

When the wire on the Feed Reel is used up, you will need to replace it as described on

page 6, step 5 through step 9.

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