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Owner's Manual & Safety Instructions
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inspection, maintenance and cleaning procedures. Write the product's serial number in the back of the manual
near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and
the receipt in a safe and dry place for future reference.
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-800-444-3353 as soon as possible.
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2011 by Harbor Freight Tools
this manual or any artwork contained herein may be reproduced in any shape
or form without the express written consent of Harbor Freight Tools. Diagrams
within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described
herein. Tools required for assembly and service may not be included.
Keep this manual for the safety warnings and precautions, assembly, operating,
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Table of Contents
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Summary of Contents for Chicago Electric MIG 170
- Page 1 Owner’s Manual & Safety Instructions Save This Manual Keep this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference.
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Page 2: Important Safety Information
Table of Contents Safety ............2 Welding Tips ..........23 Setup ............7 Maintenance ..........27 Specifications ..........7 Parts List and Diagrams ......30 Basic Welding ..........15 Warranty ............ 32 WARNING SYMBOLS AND DEFINITIONS This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. - Page 3 Fume and Gas Safety FUMES AND GASES can be hazardous to your health. 1. Exposure to welding or cutting 4. Use enough ventilation, exhaust at arc, or exhaust fumes can increase the risk both, to keep fumes and gases from breathing of developing certain cancers, such as zone and general area.
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Page 4: Electrical Safety
Electrical Safety ELECTRIC SHOCK can KILL. 1. Turn off, disconnect power, and 6. Do not expose welders to rain or wet conditions. discharge electrode to ground before setting Water entering a welder will increase down torch/electrode holder and before service. the risk of electric shock. -
Page 5: Maintenance
Welder use and care 1. Do not use the welder if the switch does not turn 4. Store idle welders out of the reach of children and it on and off. Any welder that cannot be controlled do not allow persons unfamiliar with the welder or with the switch is dangerous and must be repaired. -
Page 6: Extension Cords
Grounding TO PREVENT ELECTRIC SHOCK AND DEATH FROM INCORRECT GROUNDING WIRE CONNECTION: Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. Have a plug installed by a certified electrician. Do not use the welder if the power cord or plug is damaged. If damaged, have it repaired by a service facility before use. -
Page 7: Specifications
Symbology Wire Feed (Speed) Volts Alternating Current Workpiece Ground Cable Amperes Torch Cable Open Circuit Voltage Kilovolt Amperes Overheat Shutdown Indicator (Volts / 1000 * Amperes) Cooling Fan Inches Per Minute Housing Ground Point American Wire Gauge Specifications Power Input 240 V~, 20 A DCEN/DCEP Welding Output... -
Page 8: Face Shield Assembly
Setup Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual including all text under subheadings therein before set up or use of this product. TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION: Turn the Power Switch off and unplug the welder before assembly. Note: Remove the protective foam and cardboard from the welder before setup. -
Page 9: Wire Spool Installation
Wire Spool Installation 1. Turn the welder OFF and unplug it before proceeding. MIG 170 WIRE FEED WELDER ITEM 68885 .023″-.035″ Wire (Tip and roller change required) Capacity 22 Ga. – 1/4″ Steel Plate Material Mild Steel and Stainless Steel Types (Not for welding Aluminum.) - Page 10 Flux Core (Gas-less) Polarity Setup 6a. Flux Core (Gas-less) Wire Setup: Remove the two Knobs securing the cables. DCEN Connect the Black Ground Cable to the rear, red, Knobs positive Terminal using the Knob. – Connect the Red Torch Cable to the front, black, –...
- Page 11 Feed Feed Swing Tensioner 7. Turn the Feed Tensioner knob counterclockwise to loosen it enough to pull it down to remove tension. (Do not loosen the Tensioner knob too much, or the Tensioner will come apart.) Then, swing the Feed Swing Arm up. Feed 8.
- Page 12 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 unravel and create a tangled “bird’s nest”, wasting wire. 9. Cut off all bent and crimped wire. The cut end must have no burrs or sharp edges;...
- Page 13 2. Do not touch internal welder components while it is plugged in. 15. Do not touch the Torch’s Trigger. Plug the Power Cord into its electrical outlet and turn the welder ON. MIG 170 WIRE FEED WELDER ITEM 68885 .023″-.035″ Wire (Tip and roller change required) Capacity 22 Ga.
- Page 14 If the wire bends from the feed pressure, increase tension then the tension is set properly. until wire bends. 18. TURN THE WELDER OFF. MIG 170 WIRE FEED WELDER ITEM 68885 .023″-.035″ Wire (Tip and roller change required) Capacity 22 Ga. – 1/4″ Steel Plate...
- Page 15 Basic Welding Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual including all text under subheadings therein before welding. TO PREVENT SERIOUS INJURY: Protective gear must be worn when using the Welder; minimum shade number 10 full face shield (or welding mask), ear protection, welding gloves, sleeves and apron, NIOSH-approved respirator, and fire resistant work clothes without pockets should be...
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Page 16: Control Panel Layout
Control Panel Layout Overload Indicator Torch Cable Current Switches Power Switch MIG 170 WIRE FEED WELDER Wire ITEM 68885 Speed Dial .023″-.035″ Wire (Tip and roller change required) Capacity 22 Ga. – 1/4″ Steel Plate Material Mild Steel and Stainless Steel Types (Not for welding Aluminum.) -
Page 17: Duty Cycle (Duration Of Use)
(or other heat-proof, allowing the welder to cool with the Power Switch on, so non-conductive MIG 170 that the internal Fan will help cool the welder. When the WIRE FEED WELDER surface) -
Page 18: Flux/Mig Weld Settings
Flux Weld Settings DCEN Polarity Metal Thickness Wire Material Wire Shielding Suggested 22 Ga 18 Ga 16 Ga 14 Ga Diameter Being Type Settings .030″ .048″ .060″ .075″ 1/8″ 3/16″ 1/4″ Welded 0.8mm 1.2mm 1.5mm 2.0mm 3.2mm 4.8mm 6.4mm Current MIN 1 MIN 2 MIN 2... -
Page 19: Setting Up The Weld
Chamfer thick workpieces. Workpiece 3. Clamp Ground Cable to bare metal on the workpiece near the weld area, or to metal work Clean MIG 170 bench where the workpiece is clamped. WIRE FEED WELDER surface to ITEM 68885 Ground .023″-.035″... - Page 20 6. Flip the Power Switch to the OFF position, then plug the Welder into a dedicated, 240 V~ receptacle that matches the plug. The circuit must be equipped with delayed action type circuit breaker or fuses. MIG 170 WIRE FEED WELDER ITEM 68885 .023″-.035″ Wire (Tip and roller change required) Capacity 22 Ga.
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Page 21: Basic Welding Technique
Basic Welding Technique 1. Press (and hold) Trigger and contact area to be welded with electrode wire to ignite arc. 2. For a narrow weld, you can usually draw the wire in a steady straight line, stringer bead weave bead this is called a stringer bead. - Page 22 Switch ON for the welder to cool. When the welder can be used again, use shorter welding periods and longer rest periods to help prevent needless wear. concrete slab (or other heat-proof, non-conductive MIG 170 surface) WIRE FEED WELDER ITEM 68885 .023″-.035″ Wire (Tip and roller change required) Capacity 22 Ga.
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Page 23: Strike Test
Welding Tips A typical flux-core wire (FCAW) weld A good way to test welding technique is to examine before cleaning. a weld’s appearance after it has cooled and the slag weld bead has been removed. Then, better welding can be slag spatter learned by adjusting your weld technique... -
Page 24: Weld Diagnosis
Max1 -> Min2 Max1 -> Max2 Min2 -> Min1 less weld weld than ″ slower faster stickout MIG 170 MIG 170 WIRE FEED WELDER WIRE FEED WELDER ITEM 68885 ITEM 68885 .023″-.035″ .023″-.035″ Wire Wire (Tip and roller change required) (Tip and roller change required) Capacity 22 Ga. - Page 25 Weld Problems Penetration (Workpiece Heat Control) EXCESS PENETRATION OR PROPER PENETRATION INADEQUATE PENETRATION BURN-THROUGH Weld is visible underneath and Weld does not contact the joint Weld droops on top and bulges slightly on top. fully, just on the surface. underneath, or falls through entirely, making a hole.
- Page 26 Excessive Spatter Porosity Fine spatter is normal. Small cavities or holes in the bead. Spatter that is grainy and large is a problem. VIEW VIEW POSSIBLE CAUSES AND SOLUTIONS POSSIBLE CAUSES AND SOLUTIONS 1. Incorrect polarity: 1. Dirty workpiece or welding wire: Check that polarity is set correctly Clean workpiece down to bare metal.
- Page 27 Maintenance TO PREVENT SERIOUS INJURY, Torch FIRE AND BURNS: Unplug the welder, rest the Torch on a heat-proof, electrically non-conductive surface, and allow all parts of the Welder to cool thoroughly before service. concrete slab 1. Periodically remove the Side Panel, and using (or other heat-proof, compressed air, blow out all dust from the interior.
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Page 28: Wire Feed Motor Runs But Wire Does Not Feed Properly
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 but wire does not feed properly POSSIBLE CAUSES AND SOLUTIONS 1. -
Page 29: Wire Feeds, But Arc Does Not Ignite
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. Power switch lights, but welder does not function when switched on POSSIBLE CAUSES AND SOLUTIONS 1. -
Page 30: Parts List And Diagrams
Parts List and Diagrams Wiring Diagram Parts List Part Description Part Description Ground Clamp (and Cable) Handle Power Cord Spool Holder Grommet Hinge Current Switch Wire Feed Mechanism Wire Speed Knob Left Panel Front Panel Red Terminal PCB Holder Latch Black Terminal Divider Rubber Tube... -
Page 31: Assembly Diagram
Assembly Diagram SKU 68885 For technical questions, please call 1-800-444-3353. Page 31... - Page 32 Limited 90 Day Warranty Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper installation, normal wear and tear, or to lack of maintenance.