ITEM # HIT125 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. We reserve the right to change this product at any time without prior notice.
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. Always contact your dealer, distributor, service agent or manufacturer about problems or conditions you do not understand. This is the safety alert symbol.
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" operation certificate. l Cut off power before maintenance or repair. WARNING: Electric shock—may lead to serious injury or even death.
HIT125 is a gasless (use flux wire) MIG welder. Specifications ITEM HIT125 Power voltage (v) 120 Frequency (HZ) 60 Max no load voltage output (V) 31 Output current (A) Duty cycle Suitable wire dia. (INCH) 30-80A 80A@30% .030 - .035” Insulation class F Protection class IP21S Suggested Wire: Flux Cored Wire Use Without Shielding Gas Welds Carbon Steel Between 1.2mm-3.
Assembly 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） The working voltage is AC 120V±15%, if lower or higher than this, it will cause damage. 3） The welder will automatic recover and work again when cooled down. 3.
Installation 1. Power requirement AC single phase 120v (110-120V), 60HZ with a 20 amp time delayed fuse or circuit breaker is required. DO NOT OPERATE THIS UNIT if the ACTUAL power source voltage is less than 105 volts AC or greater than 132 volts AC. • High voltage danger from power source! Consult a qualified electrician for proper installation of receptacle. This welder must be grounded while in use to protect the operator from electrical shock.
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. #2 3.5 Based on the wire diameter, select the correct groove using the following table: Wire Diameter Roller Groove .030 inch 0.8 .035 inch 0.9 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.
4. Install the wire 4.1 Selecting the wire . Available wire for this machine : (Four inch spools are available.) Wire Type Available MIG wire .023 inch Yes MIG wire .030 inch Yes Flux core wire .030 inch Yes Flux core wire .035 inch Yes NOTE: • Burn through will occur if you attempt to weld mild or stainless steel thinner than 24 gauge. • Remove all rusted wire, if the whole spool is rusty discard it. 4.
4.2.5 The welder can use 4 inch spools only. The wing nut controls the tension on the spool. 4.2.6. Setting the wire spool tension: a) Turn the spool of wire with one hand. 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. Stop tightening the wing nut, operator may need to repeat these steps until proper spool tension is achieved.
NOTE: Due to inherent variances in flux-cored welding wire, it may be necessary to use a contact tip one size larger than your flux core wire if wire jams occur. 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.
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.
5. Tuning in the wire speed This is one of the most important parts of MIG welder operation and must be done before starting each welding job or whenever any of the following variables are changed: wire diameter, or wire type. EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE EYES AND SKIN! Prolonged exposure to the welding arc can cause blindness and burns. Never strike an arc or begin welding until you are adequately protected.
joint. Moving the torch too fast, too slow, or erratically will prevent proper fusion or create a lumpy, uneven bead. Travel direction is the direction the torch is moved along the weld joint in relation to the weld puddle. The torch is either PUSHED into the weld puddle or PULLED away from the weld puddle. For most welding jobs you will pull the torch along the weld joint to take advantage of the greater weld puddle visibility.
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. A good starting point for angle B is about 30 degrees DOWN from being perpendicular to the work piece. VERTICAL POSITION Is easier for many people to Pull the torch from top to bottom. It can be difficult to prevent the puddle from running downward.
welds to produce strong joint. The illustrations in Figure 19 show the sequence of laying multiple pass beads into a T fillet joint and a lap fillet joint. 6.5 Spot welding There are three methods of spot welding: Burn-Through, Punch and Fill, and Lap. Each has advantages and disadvantages depending on the specific application as well as personal preference. 1. The BURN-THROUGH METHOD welds two overlapped pieces of metal together by burning through the top piece and into the bottom piece.
weld is made. 6. Make spot welds on the actual work piece at desired locations. Maintenance The welder needs the regular maintenance as following: Periodically clean dust, dirt, grease, etc. from your welder. Every six months, or as necessary, remove the cover panel from the welder and air-blow any dust and dirt that may have accumulated inside the welder. TROUBLESHOOTING Problem 1. The wire feeder is not working, no wire coming out from the MIG torch Correction 1.
3. Whatever the wire feeder if working, there's First check the trigger of MIG torch, if trigger has a problem, please no wire coming from the MIG torch, even push change a new one; the button of MIG torch 4. The machine is not working, OC light is on, power is on, fan is working If not OK , then check if the Electric board is broken (change board) Wait a few minutes, the machine may be over-heated. Allow it to cool 5.
