Northern Industrial Tools 164612 User Manual
MIG 175
Item# 164612
OPERATOR’S MANUAL
Read carefully and understand RULES FOR SAFE OPERATION and instructions before
operating. Failure to follow the safety rules and other basic safety precautions may
result in serious personal injury.
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MIG 175
Item# 164612
Operation Instructions
For technical questions and replacement parts, please call 1-800-222-5381.
Thank you very much for choosing a NORTHERN TOOL + EQUIPMENT CO., product. For
future reference, please complete the owner’s record below:
Model:________________ Purchase Date:___________________
Save the receipt, warranty information and this owner’s manual. It is important that you read
the entire manual to become familiar with this product before using it.
This machine is designed for certain applications only. Northern Tool + Equipment strongly
recommends that this machine not be modified and/or used for any application other than
that for which it was designed. If you have questions relative to a particular application, DO
NOT use the machine before you contact Northern Tool + Equipment to determine if it can be
performed on the product.
Before using this welding unit, please read the following instructions carefully.
SAVE THIS MANUAL
You will need this manual for the safety warnings and precautions, assembly (if any), operating, inspection, maintenance and cleaning procedures, parts list and assembly diagram. Keep
your receipt and this manual in a safe and dry place for future reference.
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Operato r ’s Manu al
Read an d save t hese i nstruct i o ns.
Do not us e you r welde r befo re read ing this manual.
INDEX
1. General Welding Safety
1.1 Your Welding Environment
1.2 Your Welder’s Condition
1.3 Use Of Your Welder
1.4 Specific Areas of Danger, Caution or
Warning
1.4A Electrical Shock
1.4B Fumes And Gases
1.4C UV & IR Arc Rays
1.4D Fire Hazards
1.4E Hot Materials
1.4F Sparks, Flying Debris
1.4G Electromagnetic Fields
1.4H Shielding Gas, Cylinders Can Explode
1.4I Proper Maintenance And Repair
1.4J Proposition 65
2. Product Description
3. Te c h ni c a l S p e ci f i c a t i o n s
3.1 Proper Environment For The Welder
3.2 Requirement For Power Supply
3.3 Standards For The Welder
3.4 MIG Gun Illustration
3.5 Symbol Explanation
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4. We l de r S p e c i f ica t i o ns
4.1 Technical Data
4.2 Structure Of Welder
4.3 Illustration Of Complete Assembly
5. I n s t a ll a tion
5.1 Electrical Connection
5.2 Gas Connection
5.3 Wire Feed System Connection
5.4 Gun Connection
5.5 Connection Of The Gun Trigger Leads
And Ground Cable
6. O p e r a ti o n
6.1 Work piece Cleaning Before Welding
6.2 Adjustment And Test Before Welding
6.3 Welding
6.4 Maintenance And Service
7. T r o ub l e s hoo t i ng
7.1 Troubleshooting
7.2 Common Weld Defects
8. C i rcu i t C ha r t
9. Packing List
10. T r a n s p o r t A n d S t o r a g e
11. Q u a li t y Gu a r a nt e e
12. Illustrated Parts List
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Dear Owne r :
Thank you for purchasing the MIG 175 wire feed welder. It is designed to provide years of service
for you.
This manual is designed to help you safely and effectively operate your welder.
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1. General Welding Safety
WARNING!
*Welding can cause serious injury or death. Only qualified people should operate, repair or install this welder.
Read this manual before use of the welder.
WARNING!
1.1 Your Welding Environment
-Keep the environment you will be welding in free from flammable materials.
-Always keep a fire extinguisher accessible to your welding environment.
-Always have a qualified person install and operate this equipment.
-Make sure the area is clean, dry and ventilated. Do not operate the welder in humid, wet or poorly ventilated
areas.
-Always have your welder maintained by a qualified technician in accordance with local, state and national codes.
-Always be aware of your work environment. Be sure to keep other people, especially children, away from you
while welding.
-Keep harmful arc rays shielded from the view of others.
-Mount the welder on a secure bench or cart that will keep the welder secure prevent it from tipping over or
falling.
1.2 Your Welder’s Condition
-Check all cables, power cord and MIG gun 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
DANGER
Do not operate the welder if the MIG gun, wire or wire feed system is wet. Do not immerse gun or wire in water.
These components and the welder must be completely dry before attempting to use it.
-Follow the instructions in this manual.
-Keep welder in the off position when not in use.
-Connect ground lead as close to the area being welded as possible to ensure a good ground.
-Do not allow any body part to come in contact with the welding wire if you are in contact with the material being
welded, ground or electrode from another welder.
-Do not weld if you are in an awkward position. Always have a secure stance while welding to prevent accidents.
Wear a safety harness if working above ground.
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-Do not drape cables over or around your body.
-Wear a full coverage helmet with shade (see ANSI Z87.1 safety standard) and safety glasses while welding.
-Wear proper gloves and protective clothing to prevent your skin from being exposed to hot metals, UV and IR
rays.
-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
1.4A Electrical Shock
Electric arc welders can produce a shock that can cause injury or death. Touching electrically
live parts can cause fatal shocks and severe burns. While welding, all metal components connected
to the wire are electrically hot. Poor ground connections are a hazard, so secure the ground lead
before welding.
-Wear dry protective apparel: coat, shirt, gloves and insulated footwear.
-Insulate yourself from the work piece. Avoid contacting the work piece or ground.
- Do not attempt to repair or maintain the welder while the power is on.
-Inspect all cables and cords for any exposed wire and replace immediately.
-Use recommended replacement cables and cords.
-Always attach ground clamp to the work piece work table as close to the weld area as possible.
-Do not touch the welding wire and the ground or grounded work piece at the same time.
-Do not use a welder to thaw frozen pipes.
1.4B Fumes and Gases
-Fumes emitted from the welding process displace clean air and can result in injury or death.
-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. If necessary use a ventilato r, respirator with air supply or
remove the coating from the material in the weld area.
-The fumes emitted from some metals when heated are extremely toxic. Refer to the material safety data sheet for
the manufacturer’s instructions.
-Do not weld near materials that will emit toxic fumes when heated. Vapors from cleaners, sprays and degreasers
can be highly toxic when heated.
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1.4C UV and IR Arc Rays
WARNING
The welding arc produces ultraviolet (UV) and infrared (IR) rays that can cause injury to your
eyes and skin. Do not look at the welding arc without proper eye protection.
-Always use a helmet that covers your full face from the neck to top of head and to the back of
each ear.
-Use a lens that meets ANSI standards and safety glasses. For welders under 160 Amps output, use a shade 10
lens; for above 160 Amps, 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.
1.4D Fire Hazards
WARNING
Do not weld on containers or pipes that contain or have had flammable, gaseous or liquid
combustibles in them. Welding creates sparks and heat that can ignite flammable and explosive
materials.
-Do not operate any electric arc welder in areas where flammable or explosive materials are
present.
-Remove all flammable materials within 35 feet of the welding arc. If removal is not possible, tightly cover them
with fireproof covers.
-Take precautions to ensure that flying sparks do not cause fires or explosions in hidden areas, cracks or areas you
cannot see.
-Keep a fire extinguisher close in the case of fire.
-Wear garments that are oil-free with no pockets or cuffs that will collect sparks.
-Do not have on your person any items that are combustible, such as lighters or matches.
-Keep work lead connected as close to the weld area as possible to prevent any unknown, unintended paths of
electrical current from causing electrical shock and fire hazards.
-To prevent any unintended arcs, cut wire back to ¼" stick out after welding.
1.4E Hot Materials
WARNING
Welded materials are hot and can cause severe burns if handled improperly.
-Do not touch welded materials with bare hands.
-Do not touch MIG gun nozzle after welding until it has had time to cool down.
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1.4F Sparks/Flying Debris
WARNING
Welding creates hot sparks that can cause injury. Chipping slag off welds creates flying debris.
-Wear protective apparel at all times: ANSI-approved safety glasses or shield, welder’s hat and
ear plugs to keep sparks out of ears and hair.
1.4G Electromagnetic Fields
WARNING
Electromagnetic fields can interfere with various electrical and electronic devices such as
pacemakers.
-Consult your doctor before using any electric arc welder or cutting device
-Keep people with pacemakers away from your welding area when welding.
-Do not wrap cable around your body while welding.
-Wrap MIG gun and ground cable together whenever possible.
-Keep MIG gun and ground cables on the same side of your body.
1.4H Shielding Gas Cylinders Can Explode
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.
-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.
1.4I Proper Care, Maintenance And Repair
-Always have power disconnected when working on internal components.
- Do not touch or handle PC board without being properly grounded with a wrist strap. Put PC
board in staticproof bag to move or ship.
-Do not put hands or fingers near moving parts such as drive rolls or fan.
1.4J Proposition 65 Warnings
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