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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!
HAVE QUESTIONS OR PROBLEMS? CONTACT CUSTOMER SERVICE.
If you experience a problem or need parts for this product, visit our website http://www.buffalotools.com or call our
customer help line at 1-636-532-9888, Monday-Friday, 8 AM - 4 PM Central Time. A copy of the sales receipt is
required.
FOR CONSUMER USE ONLY – NOT FOR PROFESSIONAL USE.
KEEP THIS MANUAL, SALES RECEIPT & APPLICABLE WARRANTY FOR FUTURE REFERENCE
ITEM # HIT140
80A MIG Welder
Assembly & Operating Instructions
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Summary of Contents for Buffalo Tools HIT140
- Page 1 ITEM # HIT140 80A 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.
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Page 2: Recognize Safety Symbols, Words And Labels
RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS What You Need to Know About Safety Instructions Warning and Important Safety Instructions appearing in this manual are not meant to cover all possible conditions and situations that may occur. Common sense, caution and care must be exercised when operating or cleaning tools and equipment. - Page 3 SAFETY Welding is dangerous, and may cause damage to you and others, so wear protection when cutting. Professional training is needed before operating the machine. l Always wear ANSI-approved eyewear and protective equipment while operating this unit. l The operator must be qualified personnel with a valid "metal welding/cutting (OFC) operations"...
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Page 4: Specifications
HIT140 is a gas (use solid wire) & gasless (use flux wire) MIG and MMA welder. Specifications ITEM HIT140 Power voltage (v) Frequency (HZ) Max no load voltage output (V) Output current (A) MIG 30-80A/MMA 20-70A Duty cycle MIG 80A@30% / MMA 70A@30% MIG.030 - .035”... - Page 5 Assembly B (FOR GASLESS WELDING)
- Page 6 C (FOR GAS WELDING ) D (FOR MMA WELDING )
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Page 7: Working Environment
CAUTION ! ! ! ! 1. WORKING ENVIRONMENT 1） BEST TO WORK IN DRY PLACES, NOT TOO WET OR RAINY OR FULL OF DUST ETC. 2） KEEP TEMPERATURE BETWEEN 14°F TO 140°F. 2. SAFETY 1） Please keep the machine cool, make sure the fan is working and not blocked. 2）... - Page 8 #12 gauge cord or larger. Do not use an extension cord over 25 ft. in length. 3. Install the wire roller Before installing any welding wire into the unit, the proper sized groove must be placed into position on the wire drive mechanism.
- Page 9 3.5 Based on the wire diameter, select the correct groove using the following table: Wire Diameter Roller Groove .030 inch .035 inch The drive roller has two wire size grooves. When installing the drive roller, the number stamped on the drive roller for the wire size you are using should face in.
- Page 10 NOTE: • Before installing, make sure that you have removed any old wire from the torch and cable assembly. This will help to prevent the possibility of the wire jamming inside the Gun Liner. • 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.
- Page 11 Readjust the spool tension using the wing nut as necessary to correct for either problem. 4.2.7.After checking to make sure that your welder is disconnected from the AC power source, free the leading end of the wire from the spool, but DO NOT LET GO OF IT until it is secure in the drive system or the wire will unspool itself.
- Page 12 5. Setting the wire tension Arc flash can injure eyes! To reduce the risk of arc flash, make certain that the wire coming out of the end of the torch does not come in contact with work piece, ground clamp or any grounded material during the drive tension setting process or arcing will occur.
- Page 13 The gas hose, regulator and gas cylinder connections Connect the gas hose to the gas solenoid valve on the back panel of the welder. Connect the other end to the regulator connected to the shielding gas cylinder. See the following illustration. Cylinder valve: Controls GAS CYLINDER flow.
- Page 14 Operation High voltage danger from power source! Consult a qualified electrician for proper installation of receptacle at the power source. This welder must be grounded while in use to protect the operator from electrical shock. If you are not sure if your outlet is properly grounded, have it checked by a qualified electrician. Do not cut off the grounding prong or alter the plug in any way and do not use any adapters between the welder’s power cord and the power source receptacle.
- Page 15 4. Distance from the work piece If the nozzle is held off the work piece, the distance between the nozzle and the work piece should be kept constant and should not exceed 1/4 inch or the arc may begin sputtering, signaling a loss in welding performance. 5.
- Page 16 and an ANSI approved welding helmet. 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.
- Page 17 position if at all possible as good results are easier to achieve. HORIZONTAL POSITION Is performed very much the same as the flat weld except that angle B (see HOLDING THE TORCH) is such that the wire, directed more toward the metal above the weld joint is to help prevent the weld puddle from running downward while still allowing slow enough travel speed.
- Page 18 NOTE: WHEN USING SELF-SHIELDING FLUX-CORE WIRE it is very important to thoroughly chip and brush the slag off each completed weld bead before making another pass or the next pass will be of poor quality. Fillet Weld Joints. Most fillet weld joints, on metals of moderate to heavy thickness, will require multiple pass welds to produce strong joint.
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Page 19: Maintenance
3. The LAP SPOT METHOD directs the welding arc to penetrate the bottom and top pieces, at the same time, right along each side of the lap joint seam. 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. - Page 20 Problem Correction 1. Please check the roller if it is running. 1. The wire feeder is not working, no wire 2. Please put the wire deep inside the MIG torch, then push the trigger coming out from the MIG torch again.