Buffalo Tools MMIG125 Assembly & Operating Instructions Download Page 28 | Manualshive

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Reduction Gear

46Tx10T

Part Number:

RG46x10T

Reduction Gear

38Tx12T

Part Number:

RG38x12T

Reduction Gear

36Tx12T

Part Number:

RG36x12T

Gear 21T

w

ith Steel Square Shank

for Drive Roller

Part Number:

G21T

Brass Motor Gear 12T

Part Number:

G12T

Gear 20T

Part Number:

G20T

MMIG125

Diagram

of

Gear

Box

for

125

Amp

MIG/Fluxcore

Welder

20

11

08

«
...
26
27
28

Summary of Contents for MMIG125

Page 1: ... 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 DO NOT RETURN THIS PRODUCT TO THE RETAILER 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 1 888 287 6981 Monday ...

Page 2: ...ickness 18 Gauge 3 16 FEATURES Includes Ground Cable With Clamp Welding Gun Face Shield Brush Hammer KEEP THIS MANUAL SALES RECEIPT APPLICABLE WARRANTY FOR FUTURE REFERENCE READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS PRODUCT When unpacking check to make sure all parts listed are included If any parts are missing or broken please call Customer Service at 1 888 287 6981 FOR CONSUMER USE ONL...

Page 3: ...ng in that step READ ALL SAFETY INSTRUCTIONS CAREFULLY before attempting to install operate or service this welder Failure to comply with these instructions could result in personal injury and or property damage RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE Note The following safety alert symbols identify important safety messages in this manual When you see one of the symbols shown here be alert...

Page 4: ... cord plug in any way Do not attempt to plug the welder into the power source if the ground prong on power cord plug is bent over broken off or missing Do not allow the welder to be connected to the power source or attempt to weld if the welder welding cables welding site or welder power cord are exposed to any form of atmospheric precipitation or salt water spray Do not carry coiled welding cable...

Page 5: ... that can start fires burn skin and damage eyes Do not wear gloves or other clothing that contains oil grease or other flammable substances Do not wear flammable hair preparations Do not weld in an area until it is checked and cleared of combustible and or flam mable materials BE AWARE that sparks and slag can fly 35 feet and can pass through small cracks and openings If work and combustibles cann...

Page 6: ...ed steel unless the coating is removed Make certain the area is well ventilated and the operator and all bystanders are wearing air sup plied respirators Do not weld cut or heat lead zinc cad mium mercury beryllium or similar met als without seeking professional advice and inspection of the ventilation of the welding area These metals produce EXTREMELY TOXIC fumes which can cause discomfort illnes...

Page 7: ...y and understand all warnings cautions instructions and labels Failure to do so could result in serious personal injury property damage or even death IMPORTANT SAFETY INSTRUCTIONS Before using this tool you need to become familiar with its operation If you are unsure about the operation of the tool or have any questions about its proper use call the Customer Service Department at 1 888 287 6981 Fo...

Page 8: ......

Page 9: ...nnected to the metal work piece you intend to weld the welder will not have a completed circuit and you will be unable to weld A poor connection at the ground clamp will waste power and heat Scrape away dirt rust scale oil or paint before attaching the ground clamp Ground Cable The ground cable connects the ground clamp to the internal workings of the welder Welding Torch and Cable The welding tor...

Page 10: ... welder performance an exten sion cord should not be used unless absolutely necessary If necessary care must be taken in selecting an extension cord appropriate for use with your specific welder Select a properly grounded extension cord that will mate directly with the power source receptacle and the welder power cord with out the use of adapters Make certain that the extension cord is properly wi...

Page 11: ... groove must be placed into position on the wire drive mechanism Adjust the drive roller according to the following steps 1 Open the door to the welder drive com partment 2 Remove the drive tension by loosening the tension adjusting knob and lifting the Drive Tension Adjustor away from the Drive Tension Arm Pull the drive tension arm away from the drive roller 3 If there is wire already installed ...

Page 12: ...ntil you have unspooled a few turns of wire to see if the wire further down on the spool is in usable condition if not discard the spool INSTALL THE WELDING WIRE WARNING Electric shock can kill Always turn the POWER switch OFF and unplug the power cord from the ac power source before installing wire Tech Tip Before installing welding wire make sure that you have removed any old wire from the Torch...

Page 13: ...d remains 9 Loosen the tension adjusting knob holding the drive tension arm in place and lift the tension arm up off the drive roller 10 Insert the leading end of the wire into the inlet guide tube Then push it across the drive roller and into the torch assembly about six inches CAUTION Make certain that the welding wire is actually going into the torch liner Be very sure it has not somehow been a...

Page 14: ...d hand tighten securely 22 Install the nozzle on the torch assembly For best results coat the inside of the nozzle with anti stick spray or gel 23 Cut off the excess wire that extends past the end of the nozzle 24 Turn the welder ON SET THE WIRE DRIVE TENSION WARNING 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 com...

Page 15: ... slow down 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 heat setting wire diameter or wire type 1 Connect the Ground Clamp to a scrap piece of the same type of material which you will be welding It should be equal to or greater than the thickness of t...

Page 16: ...on scrap metal that can be discarded Do not attempt to make any repairs on valuable equipment until you have satisfied yourself that your practice welds are of good appearance and free of slag or gas inclusions What you fail to learn through practice will be learned through mistakes and re welds later on HOLDING THE TORCH The best way to hold the welding torch is the way that feels most comfortabl...

Page 17: ...irection and Speed A solid weld bead requires that the welding torch be moved steadily and at the right speed along the weld joint Moving the torch too fast too slow or erratically will prevent proper fusion or create a lumpy uneven bead 1 TRAVEL DIRECTION is the direction the torch is moved along the weld joint in relation to the weld puddle The torch is either PUSHED see Figure 11 into the weld ...

Page 18: ... achieve 2 The HORIZONTAL POSITION Figure 15 is next in difficulty level It is performed very much the same as the flat weld except that angle B see HOLDING THE TORCH p 15 is such that the wire and therefore the arc force is directed more toward the metal above the weld joint This is to help prevent the weld puddle from running downward while still allowing slow enough travel speed to achieve good...

Page 19: ... butt welding thicker materials you will need to prepare the edges of the material to 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 Laying more than one bead into t...

Page 20: ... duces a weld with the most finished appearance of the three spot weld meth ods In this method a hole is punched or drilled into the top piece of metal and the arc is directed through the hole to pene trate 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 ...

Page 21: ...othly Always use a contact tip stamped with the same diameter as the wire it will be used with 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 1 If the wire burns back into the tip remove the tip from the torch and clean the hole running through it with an oxygen acety lene torch tip clea...

Page 22: ... unit 6 Remove torch Strain Relief Clamp by removing the four screws 7 Take torch handle halves apart by removing four phillips head screws 8 Remove the hanging hook from the two case halves by carefully pulling it apart until it is free from the torch 9 Remove liner from gas block by pulling it from the bottom of the gas block being careful not to separate gas block halves 10 Remove liner from ou...

Page 23: ......

Page 24: ...24 TABLE 5 TROUBLESHOOTING ...

Page 25: ...25 MMIG125 WIRING DIAGRAM ...

Page 26: ......

Page 27: ...27 1 888 287 6981 ...

Page 28: ...12T Part Number RG38x12T Reduction Gear 36Tx12T Part Number RG36x12T Gear 21T with Steel Square Shank for Drive Roller Part Number G21T Brass Motor Gear 12T Part Number G12T Gear 20T Part Number G20T MMIG125Diagram of Gear Box for 125 Amp MIG Fluxcore Welder 201108 ...

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