Harbor Freight Tools Welder 93793 User Manual

DUAL MIG  
WELDER  
Model 93793  
ASSEMBLY AND OPERATING INSTRUCTIONS  
Due to continuing improvements,actual product may differ slightly from the product described herein.  
Distributed exclusively by  
®
Harbor Freight Tools .  
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Visit ourWeb site at:http://www.harborfreight.com  
TO PREVENT SERIOUS INJURY,  
READ AND UNDERSTAND ALL WARNINGS  
AND INSTRUCTIONS BEFORE USE.  
Copyright© 2006 by Harbor Freight Tools®. All rights reserved. No portion of 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, please call 1-800-444-3353.  
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PRODUCT SPECIFICATIONS  
Item  
Description  
35 ~ 140 Amps  
Welding Current  
Duty Cycle  
18% @ 140 Amps / 100% @ 45 Amps  
(Refer to chart and explanation on page 18)  
230 Volt / 60 Hz / Single Phase / 25 Amps  
Power Consumption  
(Should be connected to a 25 Amp minimum dedicated circuit)  
Open Voltage  
15.5 - 20 Volts  
Required Power Plug Type  
3-Prong, 220 VAC, polarized, twist lock (not included)  
NEMA #L6-30 or equivalent  
Power Cord Rating  
Gas Inlet Size  
12 AWG x 3C x 6’ Long  
1/4”  
Ground Cable  
4 Gauge / 6’ Long  
Torch Power Cable  
Thermal Overload Protection (with Light)  
Wire Size  
8 Gauge / 6’ Long  
Automatic shutdown and restart after cool down  
0.23” to 0.035”  
Wire Spool Size  
7-3/4” Diameter  
Included Torch Tip Size  
Accessories  
0.030”  
Wheel Kit / Wire Spool / Torch Assy. / Grounding Clamp  
Wire Brush & Hammer / Spare 1.0 & 0.8 Welding Tips  
Hand-Held Face Shield  
Net Weight  
103 Pounds  
SAVETHIS MANUAL  
You will need this manual for the safety warnings and precautions, assembly, operating,  
inspection, maintenance and cleaning procedures, parts list and assembly diagram.  
Keep your invoice with this manual. Write the invoice number on the inside of the front  
cover. Keep this manual and invoice in a safe and dry place for future reference.  
GENERAL SAFETY RULES  
WARNING!  
READ AND UNDERSTAND ALL INSTRUCTIONS  
Failure to follow all instructions listed below may result in  
electric shock, fire, and/or serious injury.  
SAVE THESE INSTRUCTIONS  
WORK AREA  
1.  
2.  
Keep your work area clean and well lit. Cluttered benches and dark areas invite  
accidents.  
Do not operate power tools in explosive atmospheres, such as in the presence  
of flammable liquids, gases, or dust. Power tools create sparks which may ignite  
the dust or fumes.  
3.  
Keep bystanders, children, and visitors away while operating a power tool.  
Distractions can cause you to lose control. Protect others in the work area from  
debris such as chips and sparks. Provide barriers or shields as needed.  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
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ELECTRICAL SAFETY  
4.  
5.  
Grounded tools must be plugged into an outlet properly installed and grounded  
in accordance with all codes and ordinances. Never remove the grounding  
prong or modify the plug in any way. Do not use any adapter plugs. Check  
with a qualified electrician if you are in doubt as to whether the outlet is properly  
grounded. If the tools should electrically malfunction or break down, grounding  
provides a low resistance path to carry electricity away from the user.  
Avoid body contact with grounded surfaces such as pipes, radiators, ranges,  
and refrigerators. There is an increased risk of electric shock if your body is  
grounded.  
6.  
7.  
Do not expose power tools to rain or wet conditions. Water entering a power  
tool will increase the risk of electric shock.  
Do not abuse the Power Cord. Never use the Power Cord to carry the tools or  
pull the Plug from an outlet. Keep the Power Cord away from heat, oil, sharp  
edges,or moving parts. Replace damaged Power Cords immediately. Damaged  
Power Cords increase the risk of electric shock.  
8.  
9.  
When operating a power tool outside, use an outdoor extension cord marked  
“W-AorW”. These extension cords are rated for outdoor use, and reduce the risk  
of electric shock.  
PERSONAL SAFETY  
Stay alert. Watch what you are doing, and use common sense when operating  
a power tool. Do not use a power tool while tired or under the influ ence of  
drugs, alcohol, or medication. A moment of inattention while operating power  
tools may result in serious personal injury.  
10.  
11.  
12.  
Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep  
your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry,  
or long hair can be caught in moving parts.  
Avoid accidental starting. Be sure the Power Switch is off before plugging in.  
Carrying power tools with your finger on the Power Switch, or plugging in power  
tools with the Power Switch on, invites accidents.  
Remove adjusting keys or wrenches before turning the power tool on. A wrench  
or a key that is left attached to a rotating part of the power tool may result in personal  
injury.  
13.  
14.  
Do not overreach. Keep proper footing and balance at all times. Proper footing  
and balance enables better control of the power tool in unexpected situations.  
Always wear eye, hearing, and breathing protection. For welding safety  
equipment, refer to number 9 on page 6.  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
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TOOL USE AND CARE  
15.  
Use clamps (not included) or other practical ways to secure and support the  
workpiece to a stable platform. Holding the work by hand or against your body is  
unstable and may lead to loss of control.  
16.  
17.  
Do not force the tool. Use the correct tool for your application. The correct tool  
will do the job better and safer at the rate for which it is designed.  
Do not use the power tool if the Power Switch does not turn it on or off. Any  
tool that cannot be controlled with the Power Switch is dangerous and must be  
replaced.  
18.  
Disconnect the Power Cord Plug from the power source before making any  
adjustments, changing accessories, or storing the tool. Such preventive safety  
measures reduce the risk of starting the tool accidentally.  
19.  
20.  
Store idle tools out of reach of children and other untrained persons. Tools are  
dangerous in the hands of untrained users.  
Maintain tools with care. Keep cutting tools sharp and clean. Properly  
maintained tools with a sharp cutting edge are less likely to bind and are easier to  
control. Do not use a damaged tool. Tag damaged tools “Do not use” until repaired.  
21.  
22.  
Check for misalignment or binding of moving parts, breakage of parts, and  
any other condition that may affect the tool’s operation. If damaged, have the  
tool serviced before using. Many accidents are caused by poorly maintained  
tools.  
Use only accessories that are recommended by the manufacturer for your  
model. Accessories that may be suitable for one tool may become hazardous when  
used on another tool.  
SERVICE  
23.  
24.  
Tool service must be performed only by qualified repair personnel. Service or  
maintenance performed by unqualified personnel could result in a risk of injury.  
When servicing a tool, use only identical replacement parts. Follow instructions  
in the “Inspection, Maintenance, And Cleaningsection of this manual. Use of  
unauthorized parts or failure to follow maintenance instructions may create a risk of  
electric shock or injury.  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
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SPECIFIC SAFETY RULES  
®
1.  
Ground this product. This Welder requires the attachment and use of a UL -  
listed, 220 volt, grounded, 3-prong, electrical Power Cord Plug (not included). Only  
a qualified electrician should install the Power Cord Plug. Never remove the  
grounding prong or modify the Power Cord Plug in any way. Do not use adapter  
plugs with this product. To comply with the National Electric Code, and to provide  
additional protection from the risk of electrical shock, this product should only be  
connected to a 220 volt, 3-hole outlet that is properly grounded.  
2.  
3.  
4.  
5.  
Maintain labels and nameplates on theWelder. These carry important information.  
If unreadable or missing, contact Harbor Freight Tools for a replacement.  
Avoid unintentional starting. Make sure you are prepared to begin work before  
turning on the Welder.  
Do not force the Welder. This tool will do the work better and safer at the speed  
and capacity for which it was designed.  
Never leave theWelder unattended when it is plugged into an electrical outlet.  
Turn off the tool, and unplug it from its electrical outlet before leaving.  
6.  
7.  
Industrial applications must follow OSHA guidelines.  
Never stand on the Welder. Serious injury could result if the Welder is tipped or if  
hot surfaces are accidently contacted.  
8.  
Maintain a safe working environment. Keep the work area well lit. Make sure  
there is adequate surrounding workspace. Always keep the work area free of  
obstructions, grease, oil, trash, and other debris. Do not use a power tool in areas  
near flammable chemicals, dusts, and vapors. Do not use this product in a damp or  
wet location.  
9.  
Prevent eye injury and burns. Wearing and using ANSI-approved personal  
safety clothing and safety devices reduce the risk for injury.  
• Wear ANSI-approved safety impact eye goggles with a welding helmet  
with protective lens.  
• Leather leggings, fire resistant shoes or boots should be worn when using this  
product. Do not wear pants with cuffs, shirts with open pockets, or any clothing  
that can catch and hold molten metal or sparks.  
• Keep clothing free of grease, oil, solvents, or any flammable substances. Wear  
dry, insulating gloves and protective clothing.  
• Wear an approved head covering to protect the head and neck. Use aprons,  
cape, sleeves, shoulder covers, and bibs designed and approved for welding  
and cutting procedures.  
• When welding/cutting overhead or in confined spaces, wear flame resistant ear  
plugs or ear muffs to keep sparks out of ears.  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
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10.  
Prevent accidental fires. Remove any combustible material from the work  
area.  
When possible, move the work to a location well away from combustible  
materials. If relocation is not possible, protect the combustibles with a  
cover made of fire resistant material.  
• Remove or make safe all combustible materials for a radius of 35 feet (10 meters)  
around the work area. Use a fire resistant material to cover or block all open  
doorways, windows, cracks, and other openings.  
• Enclose the work area with portable fire resistant screens. Protect combustible  
walls, ceilings, floors, etc., from sparks and heat with fire resistant covers.  
• If working on a metal wall, ceiling, etc., prevent ignition of combustibles on the  
other side by moving the combustibles to a safe location. If relocation of  
combustibles is not possible, designate someone to serve as a fire watch,  
equipped with a fire extinguisher, during the cutting process and for at least one  
half hour after the cutting is completed.  
• Do not weld or cut on materials having a combustible coating or combustible  
internal structure, as in walls or ceilings, without an approved method for  
eliminating the hazard.  
• Do not dispose of hot slag in containers holding combustible materials. Keep a  
fire extinguisher nearby and know how to use it.  
• After spot welding, make a thorough examination for evidence of fire. Be aware  
that easily-visible smoke or flame may not be present for some time after the fire  
has started. Do not weld or cut in atmospheres containing dangerously reactive  
or flammable gases, vapors, liquids, and dust. Provide adequate ventilation in  
work areas to prevent accumulation of flammable gases, vapors, and dust. Do  
not apply heat to a container that has held an unknown substance or a  
combustible material whose contents, when heated, can produce flammable or  
explosive vapors. Clean and purge containers before applying heat. Vent closed  
containers, including castings, before preheating, welding, or cutting.  
11.  
Avoid overexposure to fumes and gases. Always keep your head out of the  
fumes. Do not breathe the fumes. Use enough ventilation or exhaust, or both, to  
keep fumes and gases from your breathing zone and general area.  
• Where ventilation is questionable, have a qualified technician take an air  
sampling to determine the need for corrective measures. Use mechanical  
ventilation to improve air quality. If engineering controls are not feasible, use an  
approved respirator.  
• Work in a confined area only if it is well ventilated, or while wearing an air-  
supplied respirator.  
• Follow OSHA guidelines for Permissible Exposure Limits (PELs) for various  
fumes and gases.  
• Follow the American Conference of Governmental Industrial Hygienists  
recommendations for Threshold Limit Values (TLV’s) for fumes and gases.  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
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• Have a recognized specialist in Industrial Hygiene or Environmental Services  
check the operation and air quality and make recommendations for the specific  
welding or cutting situation.  
Inhalation Hazard  
Welding Produces TOXIC FUMES and GASSES.  
Exposure to welding gasses can increase the risk of developing  
certain cancers, such as cancer of the larynx and lung cancer.  
Also, some diseases that may be linked to exposure to welding gasses  
or fumes are:  
Early onset of Parkinson’s Disease  
Damage to the reproductive organs  
Inflammation of the small intestine or stomach  
Heart Disease  
Ulcers  
Kidney damage  
Respiratory diseases such as emphysema, bronchitis or pneumonia  
Safety precautions, such as using natural or forced air ventilation  
and wearing a NIOSH-approved respirator, are ESSENTIAL to reduce  
the risk of developing the above illnesses.  
12.  
13.  
14.  
Read and understand all instructions and safety precautions as outlined in  
the manufacturer’s manual for the material you will weld or cut.  
Do not touch live electrical parts. Wear dry, insulating gloves. Do not touch  
electrode or conductor tong with bare hand. Do not wear wet or damaged gloves.  
Protect yourself from electric shock. Do not use outdoors. Insulate yourself from  
the workpiece and ground. Use nonflammable, dry insulating material if possible, or  
use dry rubber mats, dry wood or plywood, or other dry insulating material big enough  
to cover your full area of contact with the work or ground.  
15.  
16.  
Ensure that the unit is placed on a stable location before use. If this unit falls  
while plugged in, severe injury, electric shock, or fire may result.  
Cylinders can explode when damaged:  
• Never weld on a pressurized or a closed cylinder.  
• Never lay a welding torch on a cylinder.  
• Never allow a welding electrode to touch the cylinder.  
• Keep cylinders away from any electrical circuits, including welding circuits.  
• Keep protective cap in place over the valve except when the cylinder is in use.  
• Use only correct gas shielding equipment designed specifically for the type of  
welding you will do. Maintain this equipment properly.  
• Always protect gas cylinders from heat, being struck, physical damage, slag,  
flames, sparks, and arcs.  
• Always use proper procedures to move cylinders.  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
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17.  
Use the right tool for the job. Do not attempt to force small equipment to do the  
work of larger industrial equipment. There are certain applications for which this  
Welder was designed. It will do the job better and more safely at the rate for which  
it was intended. Do not modify this Welder, and do not use this Welder for a purpose  
for which it was not intended.  
18.  
19.  
WARNING! People with pacemakers should consult their physician(s) before  
using this product. Electromagnetic fields in close proximity to a heart pacemaker  
could cause interference to or failure of the pacemaker.  
WARNING! The warnings and cautions discussed in this manual cannot cover  
all possible conditions and situations that may occur. It must be understood by the  
operator that common sense and caution are factors which cannot be built into this  
product, but must be supplied by the operator.  
20.  
WARNING! 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.)  
SAVE THESE INSTRUCTIONS  
GROUNDING  
NOTE:  
This Welder requires the installation of a 3-Prong, 220 VAC, polarized,  
twistlock Power Cord Plug (not included).  
NEMA configuration # L6-30 or equivalent  
The Plug must be installed by a certified electrician.  
WARNING!  
Improperly connecting the grounding wire can result in the risk of elec-  
tric shock. Check with a qualified electrician if you are in doubt as to  
whether the outlet is properly grounded. Do not modify the power cord  
plug used with the tool. Never remove the grounding prong from the  
plug. Do not use the tool if the power cord or plug is damaged. If dam-  
aged, have it repaired by a service facility before use. If the plug will not  
fit the outlet, have a proper outlet installed by a qualified electrician.  
GROUNDED TOOLS:TOOLS WITH THREE PRONG PLUGS  
1.  
Tools marked with “Grounding Required” have a three wire cord and three prong  
grounding plug. The plug must be connected to a properly grounded outlet. If the  
tool should electrically malfunction or break down, grounding provides a low  
resistance path to carry electricity away from the user, reducing the risk of electric  
shock.  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
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2.  
3.  
The grounding prong in the plug is connected through the green wire inside the  
cord to the grounding system in the tool. The green wire in the cord must be the only  
wire connected to the tool’s grounding system and must never be attached to an  
electrically “live” terminal.  
Your tool must be plugged into an appropriate outlet, properly installed by a certified  
electrician and grounded in accordance with all codes and ordinances.  
EXTENSION CORDS  
AN EXTENSION CORD MUST NEVER BE USED WITH THIS ITEM. Use of an  
extension cord could result in damage to the item or fire.  
SYMBOLOGY  
Double Insulated  
Canadian Standards  
Association  
Underwriters Laboratories,  
Inc.  
Volts Alternating Current  
V ~  
Amperes  
A
No Load Revolutions per  
Minute (RPM)  
no  
xxxx/min.  
UNPACKING  
When unpacking both boxes, check to make sure all the parts shown on the Parts Lists  
on pages 29 through 31 are included. If any parts are missing or broken, please call  
Harbor Freight Tools at the number shown on the cover of this manual as soon as pos-  
sible.  
For technical questions, please call 1-800-444-3353;  
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ASSEMBLY INSTRUCTIONS  
WARNING! Always turn off theWelder and unplug the unit from its electri-  
cal outlet prior to performing any assembly, maintenance, or service.  
TO ATTACH THE HANDLE  
HANDLE (45)  
Insert the Handle (45) into the Right  
LEFT  
HANDLE  
SOCKET (46)  
RIGHT  
HANDLE  
SOCKET (46)  
Handle Socket (46) and Left Handle  
Socket (58). Then attach the Right and  
Left Handle Sockets to the Front Panel  
(57), using the four Bolts provided.  
(See Figure A.)  
BOLT  
BOLT  
BOLT  
BOLT  
FIGURE A  
TO INSTALL THE REAR WHEELS AND CASTERS  
1.  
2.  
Insert the two Axle Brackets (40) into the slots located at the rear of the Bottom  
Panel (36). Secure the Axle Brackets to the Bottom Panel, using the two Screws  
provided. Insert the Axle (44) through the openings (located on the underside of the  
Bottom Panel) in the Axle Brackets. Insert one Wheel (43) on each end of the Axle.  
Insert one Washer (42) on each end of the Axle. Then secure the two Wheels to the  
Axle, using one Cotter Pin (41) on each end of the Axle. (See Figure B.)  
Align the four mounting holes in each of the two Casters (37) with the threaded  
mounting holes located at the front of the Bottom Panel (36). Then secure the two  
Casters to the Bottom Panel, using the eight Bolts provided. (See Figure B.)  
AXLE BRACKET (40)  
BOTTOM PANEL (36)  
AXLE BRACKET (40)  
COTTER PIN  
BOTTOM  
VIEW  
(41)  
WASHER (42)  
COTTER PIN  
(41)  
WHEEL (43)  
AXLE (44)  
WASHER (42)  
CASTER (37)  
BOLT  
FIGURE B  
For technical questions, please call 1-800-444-3353;  
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TO INSTALL A 10 LB. WIRE SPOOL  
1.  
2.  
Lift the Access Panel (31) of the Welder to expose the Wire Feed Assembly.  
If the 10 lb. Spool Axle is not already installed: Unscrew and remove the Nut and  
Washer. Install the 10 lb.Spool Axle (13) onto the Shaft, using the spring underneath  
and the washer and nut above. (See Figure C.)  
3.  
4.  
Remove the Spool Clip (14), if installed. Install a 10 lb.Spool (not included) onto the  
Spool Axle (13), making sure that the wire unwinds from the top and the hole on  
the spool lines up with the peg on the Axle. (See Figure C.)  
Attach the Spool Clip (14) to the Axle, securing it in place. (See Figure C.)  
WELDING SPOOL  
NUT  
SPOOL AXLE  
SPOOL CLIP  
FIGURE C  
REV 07j  
For technical questions, please call 1-800-444-3353;  
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TO ROUTE THE WIRE  
NOTE: When installing wire of a different size or composition, you will also need to  
change wire settings, set the gun polarity, and, possibly, install a gas cylinder. See  
pages 15-17.  
1.  
2.  
IMPORTANT: Securely hold onto the end  
of the Welding Wire and keep tension on it  
during the following steps. If this is not done  
the Welding Wire will spring backward,  
creating a tangled “bird’s nest” and resulting  
in wasted wire. (See Figure D.)  
SPOOL  
WELDING  
WIRE  
Hold the Welding Wire securely while you  
cut enough Wire off the end of the Spool to  
FIGURE D  
remove all bent and crimped Wire. Make  
sure the cut end has no burrs or sharp edges (cut again, if needed). (See Figure D.)  
3.  
4.  
5.  
Loosen and lower the Tension Adjusting Knob (15b) on the Wire Feed Assembly.  
Then, raise the Swing Arm (15a). (See Figure E.)  
Keep tension on theWeldingWire, and guide at least 12 inches of Wire into the Wire  
Feed Leader (15f). (See Figure E.)  
Lower the Swing Arm (15a) on the Wire Feed Assembly. Lower and tighten the  
Tension Adjusting Knob (15b). Once the Wire is held in place, you may release it.  
(See Figure E.)  
SWING ARM  
(15a)  
TENSION ADJUSTING KNOB  
(15b)  
SWING ARM  
(15a)  
WIRE FEED  
LEADER  
(15f)  
WIRE  
WIRE FEED  
LEADER  
(15f)  
TENSION ADJUSTING KNOB  
(15b)  
FIGURE E  
6.  
7.  
Lay the Torch Cable out in a straight line so that the Welding Wire moves through it  
easily. Leave the Access Panel (31) of the Welder open so that the Wire Feed  
Assembly can be observed.  
Remove the Gun Nozzle (51a) and Contact Tip (51b). (See Figure F, next page.)  
For technical questions, please call 1-800-444-3353;  
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WARNING!  
EXERCISE EXTREME CAUTION - RISK OF FIRE AND/OR ELECTRIC SHOCK!  
The following steps require applying power to theWelder. Do not touch  
anything with theTorch Handle orWeldingWire or an arc will be ignited.  
Do not touch the internal components of the unit while it is plugged in.  
8.  
9.  
Plug the Power Cord (54) into its 220 volt, grounded, electrical outlet. Then, turn  
the Welder ON.  
Point the Torch Handle away from all objects. Then, squeeze the Trigger Switch  
(51e) on the Torch Handle until the Welding Wire feeds through the Head Tube  
(51c) of the Torch Handle about 2 inches. If necessary, move the Torch Handle  
slightly in a circular motion to help feed the Welding Wire properly out of the Head  
Tube. (See Figure F.)  
10. NOTE: If the Welding Wire does not feed properly, and the Spool is stationary, turn  
the Welder off. Unplug the Welder. Slightly tighten the Tension Adjusting Knob  
(15b) on the Wire Feed Assembly, and rewind the Welding Wire slightly before  
retrying. (See Figure E.)  
11. To check the tension on the Wire Feed Assembly, feed the Welding Wire against a  
piece of scrap wood from 2 to 3 inches away. If the Wire stops instead of bending,  
turn the Welder OFF. Unplug the unit from its electrical outlet. Then, slightly tighten  
the Tension Adjusting Knob (15b) on the Wire Feed Assembly. (See Figure E.)  
12.  
Turn the Welder OFF, unplug it, and discharge the electrode to ground. Insert  
the Contact Tip (51b) onto the Welding Wire and screw it firmly into the Head Tube  
(51c) of theTorch Handle. Replace the Nozzle (51a), and cut off any excessWelding  
Wire over 1/2 inch. Then, close the Access Panel (31) of the Welder.  
(See Figure F.)  
REMINDER: When installing wire of a different size or composition, you will also  
need to change wire settings, set the gun polarity, and, possibly, install a gas cylinder.  
See pages 15-17.  
HEAD  
TUBE  
(51c)  
HEAD  
TUBE  
(51c)  
WELDING  
WIRE  
NOZZLE  
(51a)  
NOZZLE  
(51a)  
CONTACT  
TIP  
(51b)  
CONTACT  
TIP  
(51b)  
FIGURE F  
For technical questions, please call 1-800-444-3353;  
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TO CHANGE WIRE SETTINGS  
1.  
WARNING! Make sure to turn off the Welder and unplug it from its electrical  
outlet prior to changing wire settings.  
2.  
3.  
Open the Access Panel (31) of the Welder to expose the Wire Feed Assembly.  
Loosen, and lower the Tension Adjusting Knob (15b) on the Wire Feed Assembly.  
Then, raise the Swing Arm (15a). (See Figure G.)  
4.  
5.  
6.  
7.  
8.  
Remove the two Screws (15j) that secures the Feed Roller Bracket (15i) in place.  
Then, remove the Feed Roller Bracket. (See Figure G.)  
Install a Wire Feed Roller (16) with the proper groove size facing towards the Inner  
Panel (11) of the welder.  
Replace the Feed Roller Bracket (15i), and secure in place with the Screws.  
(See Figure G.)  
Lower the Swing Arm (15a) on the Wire Feed Assembly. Then, lower and tighten  
the Tension Adjusting Knob (15b). (See Figure G.)  
Remove the Gun Nozzle (51a) and Contact Tip (51b). Install a Contact Tip that is  
one size larger* than the diameter of Welding Wire used. Then, replace the Gun  
Nozzle. (See Figure F, previous page.)  
*This accommodates thermal expansion of the wire.  
9.  
Install the Spool of Welding Wire, and route the Wire to the Torch Gun. Then, test  
and, if necessary, adjust the Wire Feed Assembly as discussed in the previous pages  
of this manual.  
TENSION  
ADJUSTING  
KNOB  
SWING ARM  
(15A)  
(15b)  
FEED  
ROLLER  
BRACKET  
(15i)  
SCREW  
(15j)  
FIGURE G  
For technical questions, please call 1-800-444-3353;  
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SETTING THE GUN POLARITY FOR WIRE TYPE  
1.  
2.  
3.  
Set for Electrode Positive (DCEP) for gas welding with solid-core wire. Positive  
electrode (C), negative ground (D). SHOWN IN ILLUSTRATION, INITIAL SETUP.  
(See Figure H.)  
C
Set for Electrode Negative (DCEN) for gasless flux core  
wire. Negative electrode (C), positive ground (D).  
(See Figure H.)  
E
B
When connecting to the weld output terminals, do not  
place anything between the welding Cable Terminals  
(A and C) and their copper connections.  
(See Figure H.)  
D
A
4.  
5.  
Always read and follow wire manufacturer’s  
recommended polarity.  
A. Positive (+) OutputTerminal  
B. Polarity Changeover Label  
C. Negative (–) OutputTerminal  
D. Red Cable  
FIGURE H  
E. Black Cable  
TO ATTACH THE GROUND CABLE WITH CLAMP  
1.  
2.  
Insert the bare end of the Ground Cable (53) upward through the hole located at the  
rear of the Ground Clamp (52). Then secure the bare end of the Ground Cable to the  
Ground Clamp, using the Bolt, Lock Washer, and Nut provided.  
(See Figure I.)  
Insert the Connecting Plug of the Ground Cable (53) into the Ground Terminal and  
twist the Connecting Plug to lock it in place. (See Figure I.)  
GROUND CABLE WITH CLAMP  
(53, 52)  
WELDER  
(SIDE VIEW)  
TORCH CABLE  
BOLT, LOCK WASHER, NUT  
CONNECTING  
PLUG  
FIGURE I  
GROUND TERMINAL  
For technical questions, please call 1-800-444-3353;  
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TO INSTALL A GAS CYLINDER  
WARNING: Maximum cylinder height is 3 feet 3 inches (1m). Maximum  
cylinder weight is 88 lb., including gas. NEVER exceed either of these  
maximums.  
1.  
2.  
CAUTION! Do not use an Argon/Mixed pressure regulator/flow meter with CO  
2
shielding gas. To use CO shielding gas, you must install a CO gas pressure  
2
2
regulator/flow meter (neither one included).  
Thread the provided straps through the slots on the back of the welder. With  
assistance, set the cylinder onto the shelf at the back of the welder. Use the provided  
chain to secure the cylinder in place.  
3.  
4.  
Secure the cylinder in place with both of the straps.  
Remove the protective cap from the cylinder. Stand to the side of the cylinder valve,  
and open the valve slightly to blow dust and dirt from the valve. Then, close the  
valve.  
5.  
Make sure the Flow Adjust on the Pressure Regulator/Flow Meter is turned off.Then,  
screw the Pressure Regulator/Flow Meter (not included) firmly onto the cylinder  
valve.  
6.  
7.  
Attach the Gas Line (2) to the Pressure Regulator/Flow Meter from the Gas Inlet  
located on the Back Panel (5) of the Welder.  
Adjust the flow rate of the gas by turning the Flow Adjust. The typical flow rate is 10-  
30 CFH (cubic feet per hour). Make sure to check the Welding Wire  
manufacturer’s recommended flow rate.  
For technical questions, please call 1-800-444-3353;  
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OPERATING INSTRUCTIONS  
BEFORE YOU BEGIN WELDING  
Good welding requires a high degree of skill and experience. You should practice a  
few sample welds on scrap metal before you begin welding your first project. Additional  
practice periods are recommended whenever you weld a different thickness of material,  
wire, or weld a different type of connection.  
DUTY CYCLE (DURATION OF USE)  
1.  
2.  
CAUTION! Avoid damage to theWelder by not leaving the unit on for more than the  
prescribed duty cycle time.  
The duty cycle defines the number of minutes, within a 10 minute period, during  
which a givenWelder can safely produce a particular welding current. For example,  
thisWelder, with a 18% duty cycle at 140 Amps (setting 6), must be allowed to  
rest for at least 8 minutes and 12 seconds after every minute and 48 seconds  
of continuous weld at 140 Amps.  
(See Figure K.)  
3.  
4.  
Failure to carefully observe duty cycle limitations can easily over stress a Welder’s  
power generation system, contributing to premature Welder failure.  
This Welder is equipped with an internal thermal protection system to help prevent  
over stressing the unit. When the unit overheats, it automatically shuts down, then  
automatically returns to service when it cools down.  
NOTE: Once the unit returns to service, follow a more conservative duty cycle routine  
to help prevent excess wear to the Welder. (See Figure K.)  
FIGURE K  
For technical questions, please call 1-800-444-3353;  
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SETTING UP THE WELD  
WARNING!  
Before welding, make sure to read and understand all safety  
precautions and warnings discussed on pages 3 through 10.  
1.  
Overload Indicator Light (50): If too much current is drawn from the Welder, the  
Overload Protector will activate. The RED Overload Indicator Light will illuminate  
and theWelder will automatically turn off until it cools down. If this happens, turn the  
Power Switch to its “OFF” position and wait approximately 20 minutes.  
(See Figure L.)  
2.  
3.  
Wire Speed Control Knob (49): The Scale surrounding the Knob is relative value,  
not wire feed speed. (See Figure L.)  
Voltage Control Knob (55): The Scale surrounding the Knob is relative value, not  
voltage. Adjust theVoltage Control Knob based on thickness of metal being welded.  
(See Figure L.)  
OVERLOAD INDICATOR LIGHT  
(50)  
WIRE SPEED CONTROL KNOB  
(49)  
VOLTAGE CONTROL KNOB  
(55)  
FIGURE L  
4.  
5.  
If using solid-core wire, connect and secure an Argon/ CO2 gas hose to the rear of  
the Welder. (If using flux core wire, protective gas is not required.)  
Securely clamp the Ground Clamp (52) as close as possible to the metal object to  
be welded, or to the metal workbench where the object is mounted and electrically  
connected. (See Figure L.)  
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7.  
NOTE: The workpieces should be firmly held together and in position while welding.  
Use clamps (not included) to hold the workpieces so you can concentrate on the job  
at hand. The distance (if any) between the two workpieces must be controlled properly  
to allow the weld to hold both sides securely while allowing the weld to penetrate  
fully into the joint.  
8.  
9.  
Set the desired welding current (35 to 140 amps) for the type of metal being welded,  
using the Wire Speed Control Knob (49) and Voltage Control Knob (55).  
(See Figure L.)  
Make sure the Power Switch is in its “OFF” position. Then plug Power Cord of the  
Welder into a dedicated, 230 VAC, 25 amp line with delayed action type circuit  
breaker or fuse.  
10.  
11.  
While holding the WeldingTorch (51), with the WeldingWire clearly out of the way of  
any grounded objects, turn the Power Switch to its “ON” position.  
Momentarily squeeze the Trigger (51e) of the Welding Torch (51) to test the wire  
feed speed. If necessary, adjust the speed by turning the Wire Speed Control Knob  
(49). (See Figure L.)  
12.  
Orient yourself on the area to be welded, then place a Face Shield over your eyes.  
WARNING! Never look at the ignited arc without ANSI-approved,  
arc-shaded, eye protection in a full face shield. Permanent eye damage  
or blindness can occur. Skin burns can occur. Never breathe arc fumes.  
(See page 8.)  
HOLDING THE WELDING TORCH  
13.  
14.  
Hold the Welding Torch (51) in one hand and the face shield in the other. If a hands-  
free welding shield is used, then both hands can be used to control the Welding  
Torch.  
The Welding Wire should be directed straight into the joint.  
This gives an angle of 90 degrees (straight up and down) for  
groove (end to end) welds, and an angle of 45 degrees for  
fillet (T-shaped) welds.  
15.  
The end of the Welding Torch should be tilted so that the  
WeldingWire is angled anywhere in between straight on and  
15 degrees in the direction of the weld. The amount of tilt is  
called the “drag angle”. (See Figure M.)  
16.  
17.  
The Welding Wire should extend no more than 1/2” past the  
Nozzle (51a) of theWeldingTorch (51). This distance is called  
“stickout”. (See Figure M.)  
FIGURE M  
Set the Wire Speed and Voltage Control Knobs (49, 55) to the recommended start  
settings as shown in the Weld Settings Chart on the next page. (See Figure N.)  
For technical questions, please call 1-800-444-3353;  
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g
e
n
e
r
a
l
Welding Instructions continued on next page.  
For technical questions, please call 1-800-444-3353;  
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18.  
Squeeze (and hold) the Trigger Switch (51e) of the Welding Torch (51) and stroke  
the area to be welded with the Welding Wire to ignite the arc.  
A. Never tap the Welding Wire into the welding surface to ignite the arc. This will  
cause the Welding Wire to stick to the workpiece.  
B. For a narrow weld, you can usually draw the Welding Wire in a steady straight  
line. This is called a “stringer bead”.  
C. For a wider weld, draw the Welding Wire back and forth across the joint in a  
curve. This is called a “weave bead”.  
19.  
20.  
NOTE: If too much current is drawn from the Welder, the internalThermal Overload  
Protector will activate. The Overload Indicator Light (50) will illuminate and the  
Welder will automatically turn off. If this happens, turn the Power Switch to its “OFF”  
position and wait 3 to 5 minutes for the unit to cool down. (See Figure P.)  
After a few seconds, stop. Switch off theWelder, and check your progress. Compare  
your weld’s appearance with the diagrams and descriptions shown in the “Weld  
Diagnosis” section beginning on page 23. After making any necessary adjustments,  
continue the weld while carefully following the DUTY CYCLE guidelines.  
(See Figure N.)  
Welding Instructions continued on page 25.  
For technical questions, please call 1-800-444-3353;  
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WELD DIAGNOSIS  
WELD PENETRATION  
EXCESS OR BURN-THROUGH  
Weld droops on top and  
underneath, or falls through  
entirely, making a hole.  
PROPER  
Weld is visible underneath and  
bulges slightly on top.  
INADEQUATE  
Weld does not contact the joint  
fully, just on the surface.  
CROSS SECTIONS  
POSSIBLE CAUSES AND SOLUTIONS  
POSSIBLE CAUSES AND SOLUTIONS  
1. Excessive material at weld:  
1. Workpieces too thick/close:  
Joint design must allow weld to reach bot-  
tom of groove and allow proper welding  
procedures.  
Reduce wire feed speed.  
2. Overheating:  
Increase welding speed and ensure that  
welding speed is kept steady.  
2. Incorrect welding technique:  
1
Maintain / ” or less stickout.  
2
Keep arc on leading edge of weld puddle.  
Hold gun at proper angles as stated under  
Holding The Torch on page 20.  
WELD NOT ADHERING PROPERLY  
Gaps present between weld and previous bead or  
between weld and workpiece. See areas below.  
3. Insufficient weld material:  
Increase wire feed speed.  
4. Insufficient weld heat:  
CROSS  
SECTION  
Reduce Welding Speed.  
BEND AT JOINT  
POSSIBLE CAUSES AND SOLUTIONS  
1. Dirty workpiece:  
Make certain that workpiece is clean and  
free from oil, coatings, and other residues.  
CROSS  
SECTION  
2. Insufficient weld material:  
Increase wire feed speed.  
POSSIBLE CAUSES AND SOLUTIONS  
1. Improper clamping:  
3. Incorrect welding technique:  
Place stringer bead at correct place in joint.  
Adjust workpiece position or weld angle  
to permit proper welding at bottom of work-  
piece.  
Make sure that pieces are clamped se-  
curely in place.  
Make tack welds to help hold pieces.  
Pause briefly at sides when using a weave  
bead.  
Keep arc on leading edge of weld puddle.  
Hold gun at proper angles as stated under  
Holding The Torch on page 20.  
2. Excessive heat:  
Weld a small portion and allow to cool be-  
fore proceeding.  
Reduce wire feed speed.  
Increase weld speed.  
For technical questions, please call 1-800-444-3353;  
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POROSITY  
Small cavities or holes in the bead.  
CROOKED/WAVY BEAD  
TOP  
TOP  
VIEW  
VIEW  
POSSIBLE CAUSES AND SOLUTIONS  
POSSIBLE CAUSES AND SOLUTIONS  
1. Stickout too long:  
1. Stickout too long:  
Reduce stickout.  
Reduce stickout.  
2. Inaccurate welding:  
Use two hands or rest hand on steady sur-  
face.  
2. Dirty workpiece or welding wire:  
Make certain that workpiece and wire are  
both clean and free from oil, coatings, and  
other residues.  
3. Insufficient gas flow at weld:  
Increase flow of shielding gas.  
4. Dirty nozzle:  
Clean nozzle by following the directions  
in the cleaning section of this manual.  
5. Wrong type of shielding gas:  
Use only the correct welding gas for the  
application and wire.  
EXCESSIVE SPATTER  
Spatter that is grainy and large.  
Fine spatter is normal.  
TOP  
VIEW  
STRIKE TEST  
A test weld on a PIECE OF SCRAP can be tested  
by using the following procedure.  
POSSIBLE CAUSES AND SOLUTIONS  
1. Wire feeding too fast:  
WEAR ANSI GOGGLES DURINGTHIS PROCEDURE.  
Reduce wire feed speed.  
1. After two scraps have been welded to-  
gether and the weld has cooled, clamp one  
scrap* in a sturdy vise.  
2. Stay clear from underneath while you strike  
the opposite scrap with a heavy hammer,  
preferably a dead-blow hammer.  
3. A good weld will deform but not break.  
A poor weld will be brittle and snap at the  
weld.  
2. Stickout too long:  
Reduce stickout.  
3. Dirty workpiece or welding wire:  
Make certain that workpiece and wire are  
both clean and free from oil, coatings, and  
other residues.  
4. Insufficient gas flow at weld:  
Increase flow of shielding gas.  
5. Shielding gas being blown away from  
weld area:  
*This test WILL damage the weld it is performed  
on. This test is ONLY an indicator of weld tech-  
nique and is not intended to test working welds.  
Protect the weld area from drafts.  
For technical questions, please call 1-800-444-3353;  
Troubleshooting section at end of manual.  
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WHEN THE WELD IS COMPLETED  
21.  
22.  
23.  
Lift theWelding Wire completely away from any grounded object. Set the face shield  
down. Then, turn the Power Switch to its “OFF” position.  
Unplug the Power Cord (54) from the electrical outlet. Then, make sure to set the  
Welding Torch (51) on a nonflammable, nonconductive surface.  
NOTE: A wire brush/hammer (not included) can now be used to clean up the weld.  
CAUTION! The weld may still be quite hot, and sparks/chips may fly  
when cleaning. Make sure to continue wearing ANSI-approved safety  
impact eye goggles and other protective wear when cleaning a weld.  
A. The hammer can be used to knock off any excess spatter and to help knock  
down any ridges. Make sure not to damage the weld or material when striking it.  
B. The wire brush can then be used to help remove oxidation and some fine spatter.  
For technical questions, please call 1-800-444-3353;  
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INSPECTION, MAINTENANCE, AND CLEANING  
WARNING!  
Before performing any maintenance on the Welder, unplug the  
Power Cord (54) from its electrical outlet and allow all components of  
theWelder to completely cool.  
1.  
2.  
3.  
Periodically open the Access Panel (31) from the unit and, using compressed air,  
blow out all dust and debris from the interior.  
Always store the Welder in a clean, dry, safe location out of reach of children and  
other unauthorized people.  
For optimal weld quality, clean and inspect the Contact Tip (51b) and Nozzle (51a)  
before each use, as follows:  
NOZZLE INSPECTION, CLEANING, AND REPLACEMENT  
1.  
2.  
3.  
Turn the Nozzle (51a) counterclockwise while pulling to remove.  
Scrub the interior of the Nozzle (51a) clean with a wire brush.  
Examine the end of the Nozzle (51a). The end should be flat and even. If the end is  
uneven, chipped, melted, cracked, or otherwise damaged, the Nozzle will adversely  
effect the weld and should be replaced.  
4.  
Reinstall the Nozzle (51a) after inspecting and cleaning the Contact Tip (51b).  
CONTACT TIP INSPECTION, CLEANING, AND REPLACEMENT  
1.  
2.  
3.  
Make sure the entire Welding Torch (51) is completely cool before proceeding.  
Remove the Nozzle (51a) as explained above. Then remove the Contact Tip (51b).  
Scrub the exterior of the Contact Tip (51b) clean with a wire brush. Check that the  
Contact Tip is the proper type for the wire size used.  
4.  
Examine the hole at the end of the Contact Tip (51b) for the following problems:  
Shape: The hole should be an even circle, and should not be oblong or have any  
bulges in it.  
Size: The Contact Tip will decrease in efficiency as the center hole enlarges. A  
Contact Tip that measures 150% or more the original size* should be replaced.  
(*.045or more for .030”Tips; .035or more for .023Tips.)  
5.  
6.  
If any problems are noted with a Contact Tip (51b), it is recommended to have it  
replaced.  
When inspection and maintenance is completed, reinstall the ContactTip (51b) and  
Nozzle (51a).  
For technical questions, please call 1-800-444-3353;  
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REPLACING THE WELDING TORCH LINER  
1.  
2.  
3.  
4.  
Switch welder off, disconnect power, and discharge electrode to ground before  
proceeding.  
Secure welding wire to the spool, cut it near the spool, and remove it from the torch  
and cable.  
Remove the four Screws (51l) holding the Torch Housings (51j & 51k) together. Set  
Housings and Screws aside.  
Remove the four Screws (15g) that hold the Cable Clamp (15h) in place. Set aside  
the Cable Clamp, Screws, and the black sleeve on the liner underneath the cable  
clamp.  
5.  
6.  
Lay torch cable out straight to allow the cable to twist within the sleeve.  
Loosen the Fitting at the end of the Liner (51g). Once it is detached, remove the  
Liner from the gun end.  
7.  
8.  
Install a new Liner and Fitting from the gun end with the end without a Fitting first.  
Attach the Fitting at the end of the Liner (51g) through the ring at the end of the  
Power Cable (51i) and into the Switch Box (51d). Tighten securely.  
9.  
Slide the black sleeve back onto the end of the liner. Reinstall the Cable Clamp  
(15h) and Screws (15g). Trim off the Liner that extends past the Clamp.  
10.  
Carefully put the two Torch Housings (51j & 51k) back onto the torch. Make sure  
that all torch parts lay back into place properly including the Protective Sleeve (51m),  
Head Tube (51c), and Trigger (51e). See Assembly Diagram on page 31. While  
all parts are properly in place, use the four screws to reassemble theTorch Housings  
(51j, 51k).  
11.  
12.  
Check the Torch (51) for carefully for proper operation.  
Route the Wire as instructed on page 13.  
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 DISTRIBUTOR MAKES  
ANY REPRESENTATION OR WARRANTY OF ANY KINDTO THE BUYERTHAT HE OR SHE IS QUALIFIED  
TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY  
PARTS OFTHE PRODUCT. IN FACT,THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES  
THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LI-  
CENSED 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 ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTSTHERETO.  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
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PARTS LISTS AND DIAGRAMS  
WIRING SCHEMATIC  
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PARTS LIST  
Part  
Description  
Part  
Description  
1
2
3
Side Panel  
Gas Line  
Chain  
32 Latch  
33 Filter Reactor  
34 Main Transformer  
35 Transformer Carriage  
36 Bottom Panel  
4
5
6
7
8
9
Gas Bottle Support  
Back Panel  
37  
38  
39  
40  
Caster  
Rubber Support  
Top Panel  
Thermal Switch Bracket  
Thermal Switch  
Axle Bracket  
Hinge  
Rubber Washer  
41 Cotter Pin  
10 Nut, M8  
42  
43  
44  
Washer  
Wheel  
Axle  
11 Inner Panel  
12 Fan  
13 10 lb. Spool Axle  
14 10 lb. Spool Clip  
45 Handle  
46 Right Handle Socket  
47  
48  
49  
50  
Grommet  
Wire Feed Mechanism  
(includes parts 15a-15j, & 16)  
15  
Grommet  
15a Swing Arm  
Wire Speed Control Knob  
Overload Indicator Light  
15b Tension Adjusting Knob  
15c Tensioning Arm  
15d Tension Spring  
15e Tension Pusher  
15f Wire Feed Leader  
15g Screw  
51 Welding Torch/Cable Assembly  
51a Nozzle  
51b Contact Tip (.8 mm)  
51c Head Tube  
51d Switch Box  
15h Cable Clamp  
15i Feed Roller Bracket  
15j Screw  
51e Trigger  
51f Control Switch  
51g Liner and Fitting  
51h Gas Hose (white)  
51i Power Cable (black)  
51j Right Torch Housing  
51k Left Torch Housing  
51l Screw  
16  
Wire Feed Wheel (0.6 & 0.8 mm)  
17 Knob  
18 Copper Washer  
19  
Washer  
20 Insulating Washer  
21 Insulating Washer  
51m Protective Sleeve  
22  
23  
24  
25  
26  
Copper Washer  
Copper Nut, M8  
Washer  
52  
53  
Ground Clamp  
Ground Cable  
54 Line Cord  
Copper Bolt, M8  
Cable Tip  
55  
56  
Voltage Control Knob  
Cable Tip  
27 Rectifier Rack  
28 Bolt, M10 x 25  
29 Lock Washer  
57 Front Panel  
58 Left Handle Socket  
59  
60  
Voltage Control  
Circuit Board  
30  
Washer  
31 Access Panel  
61 Circuit Board Bracket  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
Page 29  
Troubleshooting section at end of manual.  
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ASSEMBLY DIAGRAM  
NOTE:
illustrat
able ind
For technical questions, please call 1-800-444-3353;  
Troubleshooting section at end of manual.  
SKU 93793  
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ASSEMBLY DIAGRAM (CONTINUED)  
Wire Feed Mechanism (15)  
15c  
15d  
15b  
15a  
15e  
15g  
15f  
16  
15h  
15j  
15i  
For technical questions, please call 1-800-444-3353;  
SKU 93793  
Page 31  
Troubleshooting section at end of manual.  
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TROUBLESHOOTING  
IMPORTANT!  
Be CERTAIN to shut off the Welder, disconnect it from power, and discharge the torch to  
ground before adjusting, cleaning, or repairing the unit.  
WIRE FEED MOTOR RUNS BUTWIRE DOES NOT FEED  
PROPERLY  
POSSIBLE CAUSES AND SOLUTIONS  
1. Insufficient wire feed pressure:  
Increase wire feed pressure properly - follow instructions on page 13-14.  
2. Incorrect wire feed roll size:  
Replace with the proper one - follow the Wire Spool instructions on page 12.  
3. Damaged torch, cable, or liner assembly:  
Have a qualified technician inspect these parts and replace as necessary.  
WIRE CREATES A BIRDS NEST DURING OPERATION  
POSSIBLE CAUSES AND SOLUTIONS  
1. Excess wire feed pressure:  
Adjust wire feed pressure properly - follow instructions on page 13-14.  
2. Incorrect contact tip size:  
Replace with the proper tip for the wire size used.  
3. Gun end not inserted into drive housing properly:  
Loosen gun securing bolt and push gun end into housing just enough so that it does  
not touch wire feed mechanism.  
4. Damaged liner:  
Have a qualified technician inspect and repair/replace as necessary.  
WELDING ARC NOT STABLE  
POSSIBLE CAUSES AND SOLUTIONS  
1. Wire not feeding properly:  
See first Troubleshooting section above.  
2. Incorrect contact tip size:  
Replace with the proper tip for the wire size used.  
3. Incorrect wire feed speed:  
Adjust wire feed speed to achieve a more stable arc.  
4. Loose torch cable or ground cable:  
Check to ensure that all connections are tight.  
5. Damaged torch or loose connection within torch:  
Have a qualified technician inspect and repair/replace as necessary.  
If the steps above do not solve the problem or if the repairs involved are too  
complex, contact a qualified technician.  
SKU 93793  
For technical questions, please call 1-800-444-3353.  
Page 32  
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TROUBLESHOOTING (continued)  
IMPORTANT!  
Be CERTAIN to shut off the Welder, disconnect it from power, and discharge the torch to  
ground before adjusting, cleaning, or repairing the unit.  
WELDER DOES NOT FUNCTIONWHEN SWITCHED ON  
POSSIBLE CAUSES AND SOLUTIONS  
1. Tripped thermal protection device:  
Shut the welder’s switch to off and allow it to cool for at least 20 minutes.  
Reduce duration or frequency of welding periods to help reduce wear on the welder.  
Refer to Duty Cycle section on page 18.  
2. Faulty or improperly connected Control Switch (51f):  
Have a technician check and secure/replace Control Switch (51f).  
3. Internal fuse blown:  
Have a qualified technician check/replace.  
WEAK ARC STRENGTH  
POSSIBLE CAUSES AND SOLUTIONS  
1. Incorrect line voltage:  
Check the line voltage and, if insufficient, have a licensed electrician remedy the situa-  
tion.  
WIRE FEEDS, BUT ARC DOES NOT IGNITE  
POSSIBLE CAUSES AND SOLUTIONS  
1. Improper ground connection:  
Make certain that the workpiece is contacted properly by the Ground Clamp and that  
the workpiece is properly cleaned near the ground clamp and the welding location.  
2. Improperly sized or excessively worn ContactTip (51b):  
Verify that ContactTip (51b) is the proper size for the welding wire used. Check that the  
hole in the tip is not deformed or enlarged. Also, check that the tip is not dirty;this would  
prevent a good connection. If needed, replace Contact Tip (51b) with proper size and  
type.  
If the steps above do not solve the problem or if the repairs involved are too  
complex, contact a qualified technician.  
SKU 93793  
For technical questions, please call 1-800-444-3353.  
Page 33  
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TROUBLESHOOTING (continued)  
IMPORTANT!  
Be CERTAIN to shut off the Welder, disconnect it from power, and discharge the torch to  
ground before adjusting, cleaning, or repairing the unit.  
WIRE FEEDS, BUT SHIELDING GAS DOES NOT FLOW  
POSSIBLE CAUSES AND SOLUTIONS  
1. Empty Gas Cylinder:  
Check gas cylinder.  
2. Nozzle Plugged:  
Clean nozzle. If damaged, replace.  
3. Regulator or cylinder valve closed:  
Make sure both valves are adjusted properly.  
4. Gas line blocked:  
Check external hose, and hose within Torch cable.  
5. Gas solenoid broken or not connected properly:  
Have a qualified technician check/replace.  
WARRANTY  
LIMITED 1 YEAR/90 DAY WARRANTY  
Harbor FreightTools Co. makes every effort to assure that its products meet high quality and durability standards,  
and warrants to the original purchaser that for a period of ninety days from date of purchase that the torch,  
liner, wire feed mechanism (if applicable), welding clamps, electrode holders, cables and accessories packed  
with the welder are free of defects in materials and workmanship. This Limited 1Year/90 Day Warranty shall  
not apply to consumable parts such as tips, welding wire, and gas nozzles. Harbor Freight Tools also  
warrants to the original purchaser, for a period of one year from date of purchase, that the transformer and  
rectifier are free from defects in materials and workmanship. This warranty does not apply to damage due  
directly or indirectly to misuse, abuse, negligence or accidents; repairs or alterations outside our facilities; or to  
lack of maintenance. We shall in no event be liable for death, injuries to persons or property, or for incidental,  
contingent, special or consequential damages arising from the use of our product. Some states do not allow  
the exclusion or limitation of incidental or consequential damages, so the above limitation of exclusion may not  
apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR  
IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.  
To take advantage of this warranty, the product or part must be returned to us with transportation charges  
prepaid. Proof of purchase date and an explanation of the complaint must accompany the merchandise. If our  
inspection verifies the defect, we will either repair or replace the product at our election or we may elect to  
refund the purchase price if we cannot readily and quickly provide you with a replacement. We will return  
repaired products at our expense, but if we determine there is no defect, or that the defect resulted from  
causes not within the scope of our warranty, then you must bear the cost of returning the product.  
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.  
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353  
If the steps above do not solve the problem or if the repairs involved are too  
complex, contact a qualified technician.  
SKU 93793  
For technical questions, please call 1-800-444-3353.  
Page 34  
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