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HIT140 Wire Feed MIG Welder

Assembly & Operating Instructions

READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS

PRODUCT.

This manual provides important information on proper operation &

maintenance. Every effort has been made to ensure the accuracy of this

manual. These instructions are not meant to cover every possible

condition and situation that may occur. We reserve the right to change this

product at any time without prior notice.

IF THERE IS ANY QUESTION ABOUT A CONDITION BEING

SAFE OR UNSAFE, DO NOT OPERATE THIS PRODUCT!

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WARRANTY FOR FUTURE REFERENCE.

CALIFORNIA PROPOSITION 65 WARNING: This product may

contain chemicals, including lead, known to the State of California to

cause cancer and birth defects or other reproductive harm. Wash

hands after handling.

Summary of content (20 pages)

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HIT140 Wire Feed MIG Welder Assembly & Operating Instructions READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS PRODUCT. This manual provides important information on proper operation & maintenance. Every effort has been made to ensure the accuracy of this manual. These instructions are not meant to cover every possible condition and situation that may occur. We reserve the right to change this product at any time without prior notice.
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Description HIT140 is a Portable DC MIG capable of welding with solid (with shielding gas) or flux core wire. Power requirements are 120VAC , 60HZ/20 amp with time delayed fuse or circuit breaker. Features infinite heat/voltage settings and wire speed, spool gun ready, spot timer over load and thermal protection. For use with or with out shielding gas, designed for mild steel and stainless steel welding in construction, automotive repair and light industrial.
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Spool Gun Not Included ON/OFF Switch In the “off” position no power is being supplied to the MIG gun. In the “ON” position power is supplied to the main transformer and control circuit Wire speed setting For adjustment of the wire feed speed. Wire compartment Inside the wire compartment are the wire feeder, spool hub/holder, set-up chart and polarity terminals. Heat Settings To adjust output voltage/heat settings.
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Ground Cable and Clamp The ground cable/clamp are attached to the work piece to complete the circuit, allowing the flow of current needed to weld. Thermal Indicator If the duty cycle of the welder is exceeded the internal temperature will exceed safe temperatures and the machine will shut down. The Thermal overload light will come on indicating this. Allow about 15 minutes for cool down before the light will go off and the temperature to fall into an allowable operating range.
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-Do not overuse or overheat your welder. Allow proper cooling time between duty cycles. -Keep hands and fingers away from moving parts and stay away from the drive rolls. -Do not point MIG gun at any body part of yourself or anyone else. -Always use this welder in the rated duty cycle to prevent excessive heat and failure. 1.4 Specific Areas of Danger, Caution or Warning Electrical Shock Fumes and Gases -Fumes emitted from the welding process displace clean air and can result in injury or death.
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use a shade 12. Refer to the ANSI standard Z87.1 for more information. -Cover all bare skin areas exposed to the arc with protective clothing and shoes. Flame-retardant cloth or leather shirts, coats, pants or coveralls are available for protection. -Use screens or other barriers to protect other people from the arc rays emitted from your welding. -Warn people in your welding area when you are going to strike an arc so they can protect themselves. causing electrical shock and fire hazards.
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-Never expose cylinders to high heat, sparks, open flames, mechanical shocks or arcs. -Do not touch cylinder with MIG gun. -Do not weld on the cylinder -Always secure cylinder upright to a cart or stationary object. -Keep cylinders away from welding or electrical circuits. -Use the proper regulators, gas hose and fittings for the specific application. -Do not look into the valve when opening it. -Use protective cylinder cap whenever possible Ground cable lead MIG gun connection Trigger leads 1.
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welder’s power cord to a properly grounded 120Vac, 60Hz, single phase, 20 amp power source. 2. Extension cord It is strongly recommended that an extension cord should not be used because of the voltage drop it produces. This drop in voltage can affect the performance of the welder. If you need to use an extension cord it must be a #12 gauge cord or larger. Do not use an extension cord over 25 ft. in length. 3.
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and bend it over to hold the wire in place. Remove the spool of wire from the spool hub by removing the drive tensioning wing nut and hardware. 3.4. Open the machine door using the “L” type six angle wrench counterclockwise unscrewing the screw drive roller on the wire, and remove the drive roller. 4. Install the wire 4.1 Selecting the wire Available wire for this machine Wire Type Available MIG wire Yes .023 inch MIG wire Yes .030 inch Flux core wire Yes .030 inch Flux core wire Yes .
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8” wire spool • Be careful when removing the welding nozzle. The contact tip on this welder is live when the gun trigger is pulled. Make certain POWER is turned OFF. 4.2.6. Setting the wire spool tension: a) Turn the spool of wire with one hand.Wing nut b) Increase the spool tension by tightening (turn clockwise) the wing nut while turning the spool. Turn the spool while tightening the wing nut until the spool slows down and operator feels a slight drag.
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4.2.20. Slide the contact tip over the wire (protruding from the end of the gun). Thread the contact tip into the end of the gun adaptor and tighten securely. 4.2.21. Install the nozzle on the gun assembly. To keep spatter from sticking to inside of the nozzle use anti-spatter spray or gel. 4.2.22 Cut off the excess wire that extends more than ¼” past the end of the nozzle. 4.2.23. Turn the welder ON • Make certain that the welding wire is actually going into the torch liner.
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1 When MIG wire is used, shielding gas is required. 1. Polarity changing: Factory polarity setting (electrode positive) is for MIG (solid wire) using a shielding gas. The RED lead is connected to positive (“+”) and the ground lead is connected to the negative (“-”). For Flux Core welding (no shielding gas is required), The RED lead is connected to the negative (“-”) polarity terminal and the ground cable is connected to the positive (“+”) terminal. 2 3 7 Cylinder valve: Controls GAS CYLINDER flow. 1.
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will be extremely poor penetration, porosity, and brittleness of weld. Mild Steel: Use CO2 for deeper penetration but increased spatter. Stainless steel: Use a mixed gas consisting of Helium, Argon and CO2. Aluminum or bronze: Use 100% Argon wire is fed out of the MIG gun. The wire speed needs to be closely matched (tuned-in) to the rate at which it is being melted off.
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that which will be used when welding. (See HOLDING THE TORCH if you are uncertain of the angle at which you will be welding). 5.4. With your free hand, turn the Wire Speed Dial to maximum and continue to hold onto the knob. 5.5. Lower your welding helmet and pull the trigger on the torch to start an arc, then begin to drag the torch toward you while simultaneously turning the Wire Speed Dial counterclockwise. 5.6.
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ELECTRIC SHOCK CAN KILL! To prevent ELECTRIC SHOCK, do not perform any welding while standing, kneeling, or lying directly on the grounded work. 6.1 Moving the torch Torch travel refers to the movement of the torch along the weld joint and is broken into two elements: Direction and Speed. A solid weld bead requires that the welding torch be moved steadily and at the right speed along the weld joint.
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prevent the weld puddle from running downward while still allowing slow enough travel speed. A good starting point for angle B is about 30 degrees DOWN from being perpendicular to the work piece. be joined by grinding a bevel on the edge of one or both pieces of the metal being joined. When this is done, a “V” is created between the two pieces of metal, that will have to be welded closed. In most cases more than one pass or bead will need to be laid into the joint to close the “V”.
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weld methods. In this method, a hole is punched or drilled into the top piece of metal and the arc is directed through the hole to penetrate into the bottom piece. The puddle is allowed to fill up the hole leaving a spot weld that is smooth and flush with the surface of the top piece. Select the wire diameter, heat setting, and tune in the wire speed as if you were welding the same thickness material with a continuous bead. 3.
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months, or as necessary, remove the cover panel from the welder and airblow any dust and dirt that may have accumulated inside the welder. Replace power cord, ground cable, ground clamp, or electrode assembly when damaged or worn. Store in a clean dry location free from corrosive gas, dust and high humidity. Temperatures should range from 10°F–120°F and a relative humidity less than 90%.
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Main Circuit Chart 19
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