Operating Instructions and Parts Manual SK 140i MMIG140 Please read and save these instructions. Read through this owner’s manual carefully before using product. Protect yourself and others by observing all safety information, warnings, and cautions. Failure to comply with instructions could result in personal injury and/or damage to product or property. Please retain instructions for future reference. READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS PRODUCT.
Operating Instructions and Parts Manual SK140i (MMIG140) Description SK140i 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, spot timer overload 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.
Operating Instructions and Parts Manual SK140i (MMIG140) Removing from carton 1.1 Remove cartons, bags or Styrofoam containing the welder and accessories. 1.2 Check the contents with the packing list below. ITEM QTY. Portable MIG Welder MIG torch Ground cable/clamp Gas hose Contact tips Gas regulator MIG nozzle “L” shaped hex wrench 1 unit 1 piece 1 piece 1 piece 2 pieces 1 piece 1 piece 1 piece 1.3 After unpacking the unit, inspect carefully for any damage that may have occurred during transit.
Operating Instructions and Parts Manual SK140i (MMIG140) 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.
Operating Instructions and Parts Manual SK140i (MMIG140) 1.2 Your Welder’s Condition -Check ground cable, power cord and welding cable to be sure the insulation is not damaged. Always replace or repair damaged components before using the welder. -Check all components to ensure they are clean and in good operating condition before use. 1.3 Use of Your Welder -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.
Operating Instructions and Parts Manual SK140i (MMIG140) -Do not breathe in fumes emitted by the welding process. Make sure your breathing air is clean and safe. -Work only in a well-ventilated area or use a ventilation device to remove welding fumes from the environment where you will be working. -Do not weld on coated materials (galvanized, cadmium plated or containing zinc, mercury or barium). They will emit harmful fumes that are dangerous to breathe.
Operating Instructions and Parts Manual SK140i (MMIG140) Hot Materials Shielding Gas Cylinders Can Explode Welded materials are hot and can cause severe burns if handled High pressure cylinders can explode if damaged, so treat them carefully. -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.
Operating Instructions and Parts Manual SK140i (MMIG140) 1.4 for MIG torch operation in flip the torch selector switch left. For spool gun, operation,flip the torch selector switch right Retaining groove Ground cable lead MIG gun connection 1.5 Connect the trigger leads into the receptacles on the front panel of the machine Trigger leads 1.2 Identify openings for the trigger leads and ground cable on the lower right side of the front panel.
Operating Instructions and Parts Manual SK140i (MMIG140) Drive Tension Arm Drive tension adjustor 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. Wire Roller 3.1. Open the door to the welder drive compartment. 3.2.
Operating Instructions and Parts Manual SK140i (MMIG140) .030 inch Flux core wire Yes .030 inch Flux core wire Yes .035 inch MIG wires available are: mild steel, stainless steel or aluminum solid wire and must be used with shielding gas. Four or eight inch spools are available. 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. 3.
Operating Instructions and Parts Manual SK140i (MMIG140) 4.2.2 Make sure the proper groove on the drive roller is in place for the wire installed. If not, change the drive roller as described above. 4.2.3 Remove the packaging from the spool of wire and then identify the leading end of the wire secured in a hole on the edge of the spool. DO NOT UNHOOK IT AT THIS TIME. 4.2.4 Place the spool on the spool hub with the wire coming off the bottom of the spool.
Operating Instructions and Parts Manual SK140i (MMIG140) slipping out of the drive assembly. Do not over tighten. 4.2.14. NOW YOU CAN LET GO OF THE WIRE. 4.2.15. Plug in and turn the welder ON. Set the VOLTAGE switch to the voltage (heat) setting recommended for the gauge metal that is to be welded. Refer to the set up chart on the inside of the wire feed compartment door. 4.2.16. Set the WIRE SPEED control in the middle of the wire speed range. 8.17.
Operating Instructions and Parts Manual SK140i (MMIG140) Slowly open the cylinder valve by turning it counterclockwise until the cylinder pressure gauge registers the cylinder pressure. Turn the adjustment knob clockwise slowly to increase gas flow to 20 cfm. To reduce the gas flow turn the adjustment counterclockwise. The gas solenoid valve is on the back panel of the welder. Gas flow can be heard at the end of the gun when the trigger is activated.
Operating Instructions and Parts Manual SK140i (MMIG140) cord and the power source receptacle. Make sure the POWER switch is OFF then connect your welder’s power cord to a properly grounded 120 VAC(110v-120v), 60Hz, single phase, 20 amp power source. 1. Main control component Power switch - The power switch supplies electrical current to the welder. Whenever the power switch is in the ON position, the welding circuit is activated.
Operating Instructions and Parts Manual SK140i (MMIG140) decrease the heat and penetration for a given heat setting by selecting higher or lower wire speed settings. Repeat this tune-in procedure if you select a new heat setting, a different diameter wire, or a different type of welding wire. 6. Welding Techniques EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE EYES AND SKIN! Prolonged exposure to the welding arc can cause blindness and burns.
Operating Instructions and Parts Manual SK140i (MMIG140) For most welding jobs you will pull the torch along the weld joint to take advantage of the greater weld puddle visibility. Travel speed is the rate at which the torch is being pushed or pulled along the weld joint. For a fixed heat setting, the faster the travel speed, the lower the penetration and the lower and narrower the finished weld bead.
Operating Instructions and Parts Manual SK140i (MMIG140) Maintaining this angle will reduce the chances of molten metal falling into the nozzle. Angle B should be held at zero degrees so that the wire is aiming directly into the weld joint. If you experience excessive dripping of the weld puddle, select a lower heat setting. Also, the weave bead tends to work better than the stringer.
Operating Instructions and Parts Manual SK140i (MMIG140) wires when using the burn-through method unless the metal is VERY thin or excessive filler metal build-up and minimal penetration is acceptable. Always select the HIGH heat setting with the burn-through method and tune in the wire speed prior to making a spot weld. 2. The PUNCH AND FILL METHOD produces a weld with the most finished appearance of the three spot weld methods.
Operating Instructions and Parts Manual SK 140i MMIG140 Please read and save these instructions. Read through this owner’s manual carefully before using product. Protect yourself and others by observing all safety information, warnings, and cautions. Failure to comply with instructions could result in personal injury and/or damage to product or property. Please retain instructions for future reference.
Operating Instructions and Parts Manual SK140i (MMIG140) Main Circuit chart 20
Operating Instructions and Parts Manual SK140i (MMIG140) Repair Parts List Reference number Description Part number Qty 1 door latch 2.08.07.803 1 2 left side panel 1.2.01.02.0083 1 3 chain bracket 2.05.17.007 2 4 bottom 1.2.01.04.0400 1 5 gas valve connector 2.07.55.616 1 6 power cord with plug 2.03.05.209 1 7 cable clamp 2.05.05.203 1 8 Circuit breaker 2.07.80.
Operating Instructions and Parts Manual SK140i (MMIG140) 9 potentiometer 2.07.10.663 1 10 fan 2.07.89.400 1 11 control transformer 1.1.04.02.0102 1 12 rectifier bracket 1.1.02.01.8162 1 13 PCB 1.1.05.02.0435 1 14 PCB support 1.1.01.05.2764 1 15 rectifier 2.07.37.509 1 16 handle 2.05.08.015 1 17 enclosure 1.2.01.01.0060 1 18 capacitance 2.07.13.051 1 19 front panel 2.05.05.029 1 20 wave switch 2.07.80.202 1 21 potentiometer 2.07.10.
Operating Instructions and Parts Manual SK140i (MMIG140) 29 middle vertical board 1.1.02.01.0775 1 30 switch 2.07.80.454 1 31 hex nut 2.06.14.006 1 32 welding wire tray baffle 2.05.05.305 1 33 welding wire tray bolt 2.05.05.308 1 34 welding wire tray baffle tip 2.05.05.306 1 35 welding wire tray spring 2.06.29.037 1 36 nut 2.05.05.
