Grizzly G0879 User guide

MODEL G0879

FLUX CORE MIG WELDER

OWNER'S MANUAL

(For models manufactured since 6/19)

4009939

COPYRIGHT © DECEMBER, 2021 BY GRIZZLY INDUSTRIAL, INC.

WARNING : NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE

OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.

#SS22162 PRINTED IN CHINA

V1.1 2 . 2 1

This manual provides critical safety instructions on the proper setup,
operation, maintenance, and service of this machine/tool. Save this
document, refer to it often, and use it to instruct other operators.

Failure to read, understand and follow the instructions in this manual
may result in fire or serious personal injury—including amputation,
electrocution, or death.

The owner of this machine/tool is solely responsible for its safe use.
This responsibility includes but is not limited to proper installation in
a safe environment, personnel training and usage authorization,
proper inspection and maintenance, manual availability and compre­hension, application of safety devices, cutting/sanding/grinding tool
integrity, and the usage of personal protective equipment.

The manufacturer will not be held liable for injury or property damage
from negligence, improper training, machine modifications or misuse.

Some dust created by power sanding, sawing, grinding, drilling, and
other construction activities contains chemicals known to the State
of California to cause cancer, birth defects or other reproductive
harm. Some examples of these chemicals are:

• Lead from lead-based paints.

• Crystalline silica from bricks, cement and other masonry products.

• Arsenic and chromium from chemically-treated lumber.

Your risk from these exposures varies, depending on how often you
do this type of work. To reduce your exposure to these chemicals:
Work in a well ventilated area, and work with approved safety equip­ment, such as those dust masks that are specially designed to filter
out microscopic particles.

Table of Contents

INTRODUCTION ............................................................................................................................... 2

Contact Info
Manual Accuracy
Identification
Controls & Components
Additional Sources for
Welding Codes and Standards
Machine Data Sheet

................................................................................................................................ 2

........................................................................................................................ 2

............................................................................................................................... 3

............................................................................................................. 4

................................................................................................................ 6

.................................................................................................. 6

................................................................................................................... 7

SECTION 1: SAFETY

Safety Instructions for Machinery
Additional Safety for Welders

SECTION 2: POWER SUPPLY

Grounding for Welding Safety

SECTION 3: SETUP

Unpacking
Needed for Setup
Inventory
Site Considerations
Assembly

SECTION 4: OPERATIONS

Operation Overview.................................................................................................................. 17

Installing/Changing Wire
Test Run
Adjusting Wire Feed Tension

Operation Guidelines................................................................................................................ 22

Welder Duty Cycle
Workpiece Inspection
Basic Operation

Welding Tips............................................................................................................................. 25

................................................................................................................................ 14

................................................................................................................................... 14

.................................................................................................................................. 16

................................................................................................................................... 20

....................................................................................................................... 8

............................................................................................... 8

................................................................................................... 10

...................................................................................................... 11

.................................................................................................. 13

....................................................................................................................... 14

..................................................................................................................... 14

.................................................................................................................. 15

........................................................................................................... 17

.......................................................................................................... 18

................................................................................................... 21

................................................................................................................... 22

............................................................................................................... 23

........................................................................................................................ 23

SECTION 5: ACCESSORIES

SECTION 6: MAINTENANCE......................................................................................................... 30

Schedule
Replacing Fuse

SECTION 7: SERVICE

Troubleshooting

WARRANTY & RETURNS

.................................................................................................................................. 30

........................................................................................................................ 30

................................................................................................................... 31

........................................................................................................................ 31

......................................................................................................... 26

............................................................................................................. 33

We stand behind our machines! If you have ques­tions or need help, contact us with the information
below. Before contacting, make sure you get the

serial number

from the

machine ID label. This will help us help you faster.

We want your feedback on this manual. What did
you like about it? Where could it be improved?
Please take a few minutes to give us feedback.

Email: [e-mail]

We are proud to provide a high-quality owner’s
manual with your new machine!

We

instruc­tions, specifications, drawings, and photographs
in this manual. Sometimes we make mistakes, but
our policy of continuous improvement also means
that

you receive is

slightly different than shown in the manual

If you find this to be the case, and the difference
between the manual and machine leaves you
confused or unsure about something

check our

website for an updated version. W

current

manuals and

on our web-

site at

Alternatively, you can call our Technical Support
for help. Before calling, make sure you write
down the

serial number
from the machine ID label (see below). This
information is required for us to provide proper
tech support, and it helps us determine if updated
documentation is available for your machine.

INTRODUCTION

Contact Info

and manufacture date

Grizzly Technical Support

1815 W. Battlefield
Springfield, MO 65807
Phone: [phone]

Email: [e-mail]

Grizzly Documentation Manager

P.O. Box 2069

Bellingham, WA 98227-2069

Manual Accuracy

made every effort to be exact with the

sometimes the machine

.

,

e post

manual updates for free

www.grizzly.com.

manufacture date and

Manufacture Date

Serial Number

-2-

Model G0879 (Mfd. Since 6/19)

Identification

To reduce your risk of
serious injury, read this
entire manual BEFORE

Become familiar with the names and locations of the controls and features shown below to better understand
the instructions in this manual.

Wire Feed

Driver

Control

Panel

Wire

Spool

Mount

Ground Clamp

Model G0879 (Mfd. Since 6/19)

Welding Gun

using machine.

-3-

Controls &

To reduce your risk of
serious injury, read this
entire manual BEFORE

Components

Welding Gun

Control Panel

B

using machine.

A

D

C

E

Figure 2. Welding gun components.

E. Nozzle: Protects contact tip.

F. Contact Tip: Creates electrical connection

with welding wire as it is fed through.

G. Welding Gun: Controls welding wire out-

put and holds consumable electrode/welding
wire.

H. Trigger: Actuates wire feed driver.

F

G

H

Ground Clamp

Figure 1. Control panel.

A. Thermal Overload Indicator Light: Orange

light will illuminate when welder has exceed­ed duty cycle and needs to cool down (see
Welder Duty Cycle on Page 22). DO NOT
unplug machine when light is on, to allow fan
to cool machine down.

B. Wire Feed Speed Dial: Adjusts wire output

speed from welding gun.

C. MIN/MAX Power Switch: Switches machine

between its minimum and maximum output
amperage settings. MIN setting will yield a
60A output, and MAX will yield 70A output.

D. ON/OFF Switch: Turns machine ON and

OFF.

-4-

I

Figure 3. Ground clamp.

I. Ground Clamp: Connects workpiece to

welding circuit.

Model G0879 (Mfd. Since 6/19)

Wire Feed Driver

Wire Spool Mount

J

M

L

Figure 4. Wire feed driver components.

J. Wire Drive Roller: Has grooves for 0.030"

and 0.035" wire gauges. Driven by motor to
deliver wire from spool through gun.

K. Tension Knob: Adjusts wire feed tension.

L. Tension Roller: Applies tension to wire by

pressing against drive roller. Amount of ten­sion can be adjusted with tension knob.

K

O

N

Figure 5. Wire spool mount components.

M. Spool Nut: Adjusts wire spool tension.

N. Spool Spindle: Applies tension to wire spool

when spool nut is tightened.

O. Spool Collar: Secures wire spool on spindle.

Model G0879 (Mfd. Since 6/19)

-5-

Codes

Additional Sources for

Welding Codes and Standards

American Conference of Government Industrial Hygienists (ACGIH), 1330 Kemper Meadow Drive, Suite
600, Cincinnati, OH 45240-1634, [phone], Website: www.acgih.org.

—Threshold Limit Values (Booklet)

American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 10036-8002, (212) 642­4900, Website: www.ansi.org.

—Practice for Occupational and Educational Eye and Face Protection, ANSI Standard Z87.1

American Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126, [phone], Website: www.aws.
org.

—Safety in welding, Cutting, and Allied Processes, ANSI Standard Z49.1
—Recommended Safe Practices for the Preparation for Welding and Cutting of Containers and Piping,

AWS F4.1

Canadian Standards Association, Standards Sales, 178 Rexdale Boulevard, Rexdale, Ontario, Canada
M9W 1R3, [phone], Website: www.csa-international.org.

—Code for Safety in Welding and Cutting, CSA Standard W117.2

Compressed Gas Association, 1735 Jefferson Davis Highway, Suite 1004, Arlington, VA 22202-4102, (703)
412-0900, Website: www.cganet.com.

—Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1

National Fire Protection Association, P. O. Box 9101, 1 Battery March Park, Quincy, MA 02269-9101, (617)
770-3000, Website: www.nfpa.org and www.sparky.org.

—National Electrical Code, NFPA Standard 70
—Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, NFPA Standard 51B

U. S. Government Printing Office, Superintendent of Documents, P. O. Box 371954, Pittsburgh, PA 15250
[phone], Website: www.osha.gov.

—OSHA, Occupational Safety and Health Standards for General Industry, Title 29, Code of Federal

Regulations (CFR), Part 1910, Subpart Q, and Part 1929, Subpart J

Like all equipment there is potential danger
when operating this welder. Accidents are
frequently caused by lack of familiarity or
failure to pay attention. Use this welder with
respect and caution to reduce the possibil­ity of operator injury. If normal safety pre­cautions are overlooked or ignored, serious
personal injury may occur.

No list of safety guidelines can be complete.
Every shop environment is different. Always
consider safety first, as it applies to your
individual working conditions. Use this and
other equipment with caution and respect.
Failure to do so could result in serious per­sonal injury, damage to equipment, or poor
work results.

-6-

Model G0879 (Mfd. Since 6/19)

Product Dimensions:

Shipping Dimensions:

Cardboard

Machine

Yes

Electrical:

20A

5-15

Operation Information:

Other Specifications:

China

IP21S

Yes
Yes

Features:

Accessories:

Data

Customer Service #: [phone] · To Order Call: [phone] · Fax #: [phone]

Weight ............................................................................................................................................................................. 33 lbs.

Width (side-to-side) x Depth (front-to-back) x Height ...................................................................................8-1/2 x 15 x 14 in.

Type ...........................................................................................................................................................................

Content ..........................................................................................................................................................................

Weight .............................................................................................................................................................................. 36 lbs.

Length x Width x Height ..................................................................................................................................... 21 x 13 x 15 in.

Must Ship Upright .................................................................................................................................................................

Machine Data Sheet

MODEL G0879

FLUX CORE MIG WELDER

Power Requirement ........................................................................................................................ 110V, Single-Phase, 60 Hz

Minimum Circuit Size ...........................................................................................................................................................

Output Current / Duty Cycle (LOW) ........................................................................................................................ 20% @ 60A

Output Current / Duty Cycle (HIGH) ....................................................................................................................... 10% @ 70A

Power Cord Length ...............................................................................................................................................................7 ft.

Power Cord Gauge .......................................................................................................................................................14 AWG

Included Plug Type ..............................................................................................................................................................

Switch Type ......................................................................................................................................................ON/OFF Rocker

Minimum Material Thickness ..........................................................................................................................................1/16 in.

Maximum Material Thickness .........................................................................................................................................3/16 in.

Wire Feed Speed Range (Inches per Minute) ..................................................................................................... 200 - 600 IPM

Wire Diameter Range ........................................................................................................................................0.030, 0.035 in.

Maximum Wire Spool Diameter ...........................................................................................................................................4 in.

Torch Cable Length ..............................................................................................................................................................7 ft.

Ground Cable Length ..................................................................................................................................................... 6-1/2 ft.

Country of Origin ...............................................................................................................................................................

Warranty ........................................................................................................................................................................... 1 Year

Approximate Assembly & Setup Time ......................................................................................................................15 Minutes

Serial Number Location ..................................................................................................................................Machine ID Label

Housing Protection Class ..................................................................................................................................................

ISO 9001 Factory ..................................................................................................................................................................

Certified by a Nationally Recognized Testing Laboratory (NRTL) ........................................................................................

Model G0879 (Mfd. Since 6/19)

Adjustable Wire Speed Control
Low 60A and High 70A Modes
Capable of Welding Steel and Stainless Steel

Brush/Chipping Hammer

0.030 in. & 0.035 in. Tips
1 lb. of 0.035 in. Flux Wire

-7-

Safety

SECTION 1: SAFETY

For Your Own Safety, Read Instruction

Manual Before Operating This Machine

The purpose of safety symbols is to attract your attention to possible hazardous conditions.
This manual uses a series of symbols and signal words intended to convey the level of impor­tance of the safety messages. The progression of symbols is described below. Remember that
safety messages by themselves do not eliminate danger and are not a substitute for proper
accident prevention measures. Always use common sense and good judgment.

Indicates an imminently hazardous situation which, if not avoided,
WILL result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,
COULD result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,
MAY result in minor or moderate injury. It may also be used to alert
against unsafe practices.

Alerts the user to useful information about proper operation of the

NOTICE

machine to avoid machine damage.

Safety Instructions for Machinery

OWNER’S MANUAL. Read and understand this

owner’s manual BEFORE using machine.

TRAINED OPERATORS ONLY. Untrained oper­ators have a higher risk of being hurt or killed.
Only allow trained/supervised people to use this
machine. When machine is not being used, dis­connect power, remove switch keys, or lock-out
machine to prevent unauthorized use—especially
around children. Make your workshop kid proof!

DANGEROUS ENVIRONMENTS. Do not use
machinery in areas that are wet, cluttered, or have
poor lighting. Operating machinery in these areas
greatly increases the risk of accidents and injury.

MENTAL ALERTNESS REQUIRED. Full mental
alertness is required for safe operation of machin­ery. Never operate under the influence of drugs or
alcohol, when tired, or when distracted.

ELECTRICAL EQUIPMENT INJURY RISKS.
You can be shocked, burned, or killed by touching
live electrical components or improperly grounded
machinery. To reduce this risk, only allow qualified
service personnel to do electrical installation or
repair work, and always disconnect power before
accessing or exposing electrical equipment.

DISCONNECT POWER FIRST.
nect machine from power supply BEFORE mak­ing adjustments, changing tooling, or servicing
machine. This prevents an injury risk from unin­tended startup or contact with live electrical com­ponents.

EYE PROTECTION. Always wear ANSI-approved
safety glasses or a face shield when operating or
observing machinery to reduce the risk of eye
injury or blindness from flying particles. Everyday
eyeglasses are NOT approved safety glasses.

Always discon-

-8-

Model G0879 (Mfd. Since 6/19)

WEARING PROPER APPAREL. Do not wear
clothing, apparel or jewelry that can become
entangled in moving parts. Always tie back or
cover long hair. Wear non-slip footwear to reduce
risk of slipping and losing control or accidentally
contacting cutting tool or moving parts.

HAZARDOUS DUST. Dust created by machinery
operations may cause cancer, birth defects, or
long-term respiratory damage. Be aware of dust
hazards associated with each workpiece mate­rial. Always wear a NIOSH-approved respirator to
reduce your risk.

HEARING PROTECTION. Always wear hear­ing protection when operating or observing loud
machinery. Extended exposure to this noise
without hearing protection can cause permanent
hearing loss.

REMOVE ADJUSTING TOOLS. Tools left on
machinery can become dangerous projectiles
upon startup. Never leave chuck keys, wrenches,
or any other tools on machine. Always verify
removal before starting!

USE CORRECT TOOL FOR THE JOB. Only use
this tool for its intended purpose—do not force
it or an attachment to do a job for which it was
not designed. Never make unapproved modifica­tions—modifying tool or using it differently than
intended may result in malfunction or mechanical
failure that can lead to personal injury or death!

AWKWARD POSITIONS. Keep proper footing
and balance at all times when operating machine.
Do not overreach! Avoid awkward hand positions
that make workpiece control difficult or increase
the risk of accidental injury.

CHILDREN & BYSTANDERS. Keep children and
bystanders at a safe distance from the work area.
Stop using machine if they become a distraction.

GUARDS & COVERS. Guards and covers reduce
accidental contact with moving parts or flying
debris. Make sure they are properly installed,
undamaged, and working correctly BEFORE
operating machine.

FORCING MACHINERY. Do not force machine.
It will do the job safer and better at the rate for
which it was designed.

NEVER STAND ON MACHINE. Serious injury
may occur if machine is tipped or if the cutting
tool is unintentionally contacted.

STABLE MACHINE. Unexpected movement dur­ing operation greatly increases risk of injury or
loss of control. Before starting, verify machine is
stable and mobile base (if used) is locked.

USE RECOMMENDED ACCESSORIES. Consult
this owner’s manual or the manufacturer for rec­ommended accessories. Using improper acces­sories will increase the risk of serious injury.

UNATTENDED OPERATION. To reduce the
risk of accidental injury, turn machine OFF and
ensure all moving parts completely stop before
walking away. Never leave machine running
while unattended.

MAINTAIN WITH CARE. Follow all maintenance
instructions and lubrication schedules to keep
machine in good working condition. A machine
that is improperly maintained could malfunction,
leading to serious personal injury or death.

DAMAGED PARTS. Regularly inspect machine
for damaged, loose, or mis-adjusted parts—or
any condition that could affect safe operation.
Immediately repair/replace BEFORE operating
machine. For your own safety, DO NOT operate
machine with damaged parts!

MAINTAIN POWER CORDS. When disconnect­ing cord-connected machines from power, grab
and pull the plug—NOT the cord. Pulling the cord
may damage the wires inside. Do not handle
cord/plug with wet hands. Avoid cord damage by
keeping it away from heated surfaces, high traffic
areas, harsh chemicals, and wet/damp locations.

EXPERIENCING DIFFICULTIES. If at any time
you experience difficulties performing the intend­ed operation, stop using the machine! Contact our
Technical Support at [phone].

Model G0879 (Mfd. Since 6/19)

-9-

Additional Safety for Welders

Serious injury, burns, electric shock, or death can occur from misuse of the welder. Welding fumes
can cause suffocation or poisoning if operating in an enclosed space. Arc rays can cause eye
injury. Sparks and spatter can cause nearby flammable materials to ignite. To reduce the risks of
welding, anyone operating this machine MUST completely heed the hazards and warnings below.

WELDING FUMES. Breathing welding fumes can

cause suffocation or poisoning without warning.
Keep your head out of welding fumes. Use ade­quate ventilation at arc to safely remove fumes from
your breathing zone and general area. Use ANSI­approved respirators recommended for type of
welding operation. Protect others from these fumes.

ELECTRIC SHOCK. Connect welder to power
source with approved earth ground. Make sure
all electrical connections are tight, clean, and dry.
Connect workpiece to approved earth ground. Work
lead is NOT a ground connection and is to be used
only to complete working welding circuit. Welding in
wet and humid conditions drastically increases risk
of electrical shock.

PREVENT FIRES. Keep welding work zones clear
of flammable liquids, such as gasoline and solvents;
combustible solids, such as paper and wood; and
flammable gases, such as acetylene and hydrogen.
Provide approved fire barriers and fire extinguishing
equipment for welding zone of at least 35’ radius.
Stay alert for sparks and spatter thrown into cracks
and crevices that can start smoldering fire.

HANDLING GAS CYLINDERS. Regardless of
content, pressurized gas cylinders can explode.
Always secure protector cap in place over outlet
valve assembly when moving cylinder. Broken valve
could release pressurized contents and cause cylin­der to be hurled about at dangerously high speeds,
causing serious property damage, personal injury,
or death. Always use safe methods when mov­ing gas cylinders. Secure gas cylinder to wall or
approved cylinder cart with chain before using or
storing.

WORK AREA. Keep working area clear of any
material not involved in welding operation. Keep all
equipment, workpieces, and work surfaces clean,
dry, and free of entanglements. Keep lead cables
organized and away from your body.

WORKPIECE. Take proper precautions and think
about workpiece you are welding on. Welding cer­tain treated metals, such as galvanized steel, can
create severely toxic fumes. DO NOT weld, burn,
or heat sealed or pressurized containers. Observe
specific guidelines when welding workpiece to
ensure safe practice has not been overlooked.

ARC BURNS, SPARKS, SPATTER, AND HOT
MATERIALS. Welding without complete and

approved body protection can cause severe dam­age to eyes and body. Wear non-flammable protec­tive clothing, welding gloves, cap, long-sleeve shirt,
cuffless pants, and leather boots. DO NOT wear
jewelry or frayed clothing. Use welding helmet with
correct shade of filter for operation. Protect bystand­ers and property in working zone from exposure to
arc radiation, sparks, and spatter. Welding opera­tions create extreme amounts of heat. Make sure to
allow for cooling before handling welded materials.

WELDING IN CONFINED SPACES. Always open
all covers, sustain forced ventilation, remove toxic
and hazardous materials, and provide a power
disconnect to the welder inside the work space.
Always work with someone who can give you help
from outside the space. Welding can displace oxy­gen. Always check for safe breathing atmosphere
and provide air-supplied respirators if necessary.
Keep in mind that all normal welding hazards are
intensified in a confined space.

PROTECTING GAS CYLINDERS. Excessive heat
can cause pressurized gas to expand and explode
cylinder. Never weld on gas cylinder. Damaging
cylinder can cause cylinder to crack and explode.
Exploding pressurized gas cylinders can cause

-10 -

ELECTROMAGNETIC FIELDS (EMF). Welding
operations create EMF around welding equipment
and workpieces. Operators with pacemakers must
consult their physician before using this equipment,
or being within 50 feet of welding operations.

Model G0879 (Mfd. Since 6/19)

SECTION 2: POWER SUPPLY

Before installing the machine, consider the avail­ability and proximity of the required power supply
circuit. If an existing circuit does not meet the
requirements for this machine, a new circuit must
be installed. To minimize the risk of electrocution,
fire, or equipment damage, installation work and
electrical wiring must be done by an electrician or
qualified service personnel in accordance with all
applicable codes and standards.

or equipment damage
may occur if machine is
not properly grounded
and connected to power

The full-load current rating is the amperage a
machine draws at 100% of the rated output power.
On machines with multiple motors, this is the
amperage drawn by the largest motor or sum of all
motors and electrical devices that might operate
at one time during normal operations.

The full-load current is not the maximum amount
of amps that the machine will draw. If the machine
is overloaded, it will draw additional amps beyond
the full-load rating.

If the machine is overloaded for a sufficient length
of time, damage, overheating, or fire may result—
especially if connected to an undersized circuit.
To reduce the risk of these hazards, avoid over­loading the machine during operation and make
sure it is connected to a power supply circuit that
meets the specified circuit requirements.

For your own safety and protection of

Note: Circuit requirements in this manual apply to

a dedicated circuit—where only one machine will
be running on the circuit at a time. If machine will
be connected to a shared circuit where multiple
machines may be running at the same time, con­sult an electrician or qualified service personnel to
ensure circuit is properly sized for safe operation.

A power supply circuit includes all electrical
equipment between the breaker box or fuse panel
in the building and the machine. The power sup­ply circuit used for this machine must be sized to
safely handle the full-load current drawn from the
machine for an extended period of time. (If this
machine is connected to a circuit protected by
fuses, use a time delay fuse marked D.)

This machine is prewired to operate on a power
supply circuit that has a verified ground and meets
the following requirements:

process. DO NOT connect to power until

Availability

Electrocution, fire, shock,

Serious injury could occur if you connect
machine to power before completing setup

instructed later in this manual.

110V Circuit Requirements

Voltage .................................... 110V, 115V, 120V

..........................................................60 Hz

Cycle
Phase
Power Supply Circuit

........................................... Single-Phase

......................... 20 Amps

supply.

Full-Load Current Rating

Full-Load Current Rating at 110V ......20 Amps

Model G0879 (Mfd. Since 6/19)

property, consult an electrician if you are
unsure about wiring practices or electrical
codes in your area.

-11-

Improper connection of the equipment-grounding
wire can result in a risk of electric shock. The
wire with green insulation (with or without yellow
stripes) is the equipment-grounding wire. If repair
or replacement of the power cord or plug is nec­essary, do not connect the equipment-grounding
wire to a live (current carrying) terminal.

Check with a qualified electrician or service per­sonnel if you do not understand these grounding
requirements, or if you are in doubt about whether
the tool is properly grounded. If you ever notice
that a cord or plug is damaged or worn, discon­nect it from power, and immediately replace it with
a new one.

We do not recommend using an extension cord
with this machine.
cord, only use it if absolutely necessary and only
on a temporary basis.

Extension cords cause voltage drop, which can
damage electrical components and shorten motor
life. Voltage drop increases as the extension cord
size gets longer and the gauge size gets smaller
(higher gauge numbers indicate smaller sizes).

Any extension cord used with this machine must
be in good condition and contain a ground wire
and matching plug/receptacle. Additionally, it must
meet the following size requirements:

Grounding & Plug Requirements

it will not fit the outlet, have a qualified
electrician install the proper outlet with a

This machine MUST be grounded. In the event
of certain malfunctions or breakdowns, grounding
reduces the risk of electric shock by providing a
path of least resistance for electric current.

This machine is equipped with a power cord that
has an equipment-grounding wire and a grounding
plug. Only insert plug into a matching receptacle
(outlet) that is properly installed and grounded in
accordance with all local codes and ordinances.
DO NOT modify the provided plug!

GROUNDED

5-15 RECEPTACLE

Grounding Pin

5-15 PLUG

Extension Cords

If you must use an extension

Neutral Hot

Figure 6. Typical 5-15 plug and receptacle.

SHOCK HAZARD!
Two-prong outlets do not meet the grounding
requirements for this machine. Do not modify
or use an adapter on the plug provided—if

verified ground.

-12-

Minimum Gauge Size ...........................12 AWG

Maximum Length (Shorter is Better).......25 ft.

Model G0879 (Mfd. Since 6/19)

Grounding for

Welding Safety

There are two or more electrical circuits involved
in any welding operation. The practice of safely
grounding these circuits is documented in vari­ous codes and standards (refer to Additional

Sources for Welding Codes and Standards on
Page 6).

Welding Machine Ground

When properly connected to a power source, the
Model G0879 welder is grounded through the
power cord and power grid. The internal welding
circuit of the welder is insulated from the external
enclosure. However, to avoid shocking hazards
if this internal insulation fails, you must establish
a separate earth ground for the welder's external
enclosure. This ground will ensure that if a short
does occur and the metal enclosure becomes
integrated with the welding current, the current
will safely dissipate directly through the ground
instead of through you.

Note: Refer to the publication NFPA 70, National
Electric Code, Article 250, Grounding, and your
local electrical codes for the correct method of
establishing this ground.

Workpiece Ground

The incoming power circuit to the welder and the
working welding circuit are two separate circuits
that must have separate grounds. The welding
circuit consists of the internal components of the
welder, the welding cables, the electrode holder/
gun assembly, the work clamp, and the workpiece.

ANSI Welding Standards (Z49.1, 11.3.2.1) specify
that "Grounding [of the workpiece] shall be done
by locating the work on a grounded metal floor or
platen, or by connection to a grounded building
frame or other satisfactory ground."

Always ensure that the ground for the
incoming power circuit to the welder and
the ground for the working welding circuit
are never connected. Failure to comply with
this warning could result in death, serious
personal injury, or property damage.

However, you must also avoid "double ground­ing" the workpiece. ANSI Z49.1 states that "Care
shall be taken to avoid the flow of welding current
through a connection intended only for safety
grounding since the welding current may be of a
higher magnitude than the grounding conductor
can safely carry."

Wire-feed welders use a high frequency
current that creates a high electromagnetic
field (EMF) around the welder. EMF disrupts
electronic devices. To avoid damage, keep
electronic devices at least 50 feet from the
welder when it is powered ON. Workers who
have pacemakers must consult with their
physician before using this equipment or
being within 50 feet of welding operations.

Model G0879 (Mfd. Since 6/19)

Note: The work lead from the welder is some­times incorrectly referred to as the "ground lead."
The work lead from the welder is NOT a ground.
The work lead and the ground connection to the
workpiece are separate and must NOT be con­nected in any way.

-13-

SECTION 3: SETUP

The following items are needed, but not included,
for the setup/assembly of this machine.

This machine was carefully packaged for safe
transport. When unpacking, separate all enclosed
items from packaging materials and inspect them
for shipping damage.

,

please

at [phone].

IMPORTANT:

you are completely satisfied with the machine and
have resolved any issues between Grizzly or the
shipping agent. You MUST have the original pack-

aging to file a freight claim. It is also extremely
helpful if you need to return your machine later.

The following is a list of items shipped with your
machine. Before beginning setup, lay these items
out and inventory them.

If any non-proprietary parts are missing (e.g. a
nut or a washer), we will gladly replace them; or
for the sake of expediency, replacements can be
obtained at your local hardware store.

This machine presents
serious injury hazards
to untrained users. Read
through this entire manu­al to become familiar with
the controls and opera­tions before starting the
machine!

Wear safety glasses during
the entire setup process!

Unpacking

Inventory

Loose Parts (Figure 7) Qty

A. Face Shield ............................................... 1

B. Face Shield Handle .................................... 1

C. Machine Handle ......................................... 1

D. Flux Core Wire Roll (0.035 in.) ................... 1

E. Slag Hammer/Wire Brush .......................... 1

Spare Face Shield Lens ............................. 1

F.

If items are damaged

call us immediately

Save all packaging materials until

Needed for Setup

Description Qty

• Phillips Screwdriver #2 ............................... 1

• Needle-Nose Pliers .................................... 1

• Safety Glasses ........................................... 1

-14-

A

F

Figure 7. Inventory.

Model G0879 (Mfd. Since 6/19)

B

CD

E

NOTICE

Refer to the Machine Data Sheet for the weight
and footprint specifications of your machine.
Some workbenches may require additional rein­forcement to support the weight of the machine
and workpiece materials.

Consider anticipated workpiece sizes and addi­tional space needed for auxiliary stands, work
tables, or other machinery when establishing a
location for this machine in the shop. Below is
the minimum amount of space needed for the

If you cannot find an item on this list, care­fully check around/inside the machine and
packaging materials. Often, these items get
lost in packaging materials while unpack­ing or they are pre-installed at the factory.

Hardware Bag (Figure 8) Qty

G. Spool Collar ............................................... 1

H. Contact Tips (0.030", 0.035") ..................... 1

I. Phillips Head Screws M5-.8 X 20 ............... 2

—Lock Washers 5mm ................................ 2

—Flat Washers 5mm.................................. 2

J. Spare Fuses 5A 250V ................................ 2

K. Compression Spring 1 X 20 X 18 ............... 1

L. Spool Nut M10-1.5 ...................................... 1

Site Considerations

Workbench Load

Placement Location

G

L

K

Figure 8. Hardware bag.

H

81⁄2"

I

J

(Power Connection)

110V

15"

Figure 9. Machine clearances.

12"

Electrical Installation

Place this machine near an existing power source.
Make sure all power cords are protected from
traffic, material handling, moisture, chemicals, or
other hazards. Make sure to leave enough space
around machine to disconnect power supply or
apply a lockout/tagout device, if required.

Model G0879 (Mfd. Since 6/19)

-15-

Assembly

The machine must be fully assembled before it
can be operated. Before beginning the assembly
process, refer to Needed for Setup on Page 14
and gather all listed items.

3. Install wire roll on spool spindle so spool will
feed counterclockwise.

Secure wire spool using spool collar, com-

4.

pression spring, and spool nut (see Figure 11).
Wire spool should have some resistance but
rotate freely.

To assemble machine:

Install handle using (2) Phillips head screws

1.

with pre-installed lock washers and flat wash­ers (see Figure 10).

Slide latch back to lift top cover and expose

2.

wire spool spindle and feed mechanism (see
Figure 10).

x 2

Top

Cover

Latch

Spool

Nut

Compression

Spring

Wire

Spool

Figure 11. Wire spool installed.

Assemble face shield by folding edges and

5.

snapping together. Install face shield handle
by snapping it to front of face shield.

Spool
Collar

-16 -

Figure 10. Handle installed.

Model G0879 (Mfd. Since 6/19)

Test Run

Once assembly is complete, test run the machine
to ensure it is properly connected to power and
safety components are functioning correctly.

If you find an unusual problem during the test run,
immediately stop the machine, disconnect it from
power, and fix the problem BEFORE operating the
machine again. The

table in the

SERVICE section of this manual can help.

DO NOT start machine until all preceding
setup instructions have been performed.
Operating an improperly set up machine

ed results that can lead to serious injury,

Serious injury or death can result from

Troubleshooting

Damage to your eyes and lungs could result
from using this machine without proper
protective gear. Always wear safety glasses,
welder's helmet, and a respirator when oper­ating this welder.

The Test Run consists of verifying that the motor
powers up and runs correctly.

using this machine BEFORE understanding
its controls and related safety information.
DO NOT operate, or allow others to operate,
machine until the information is understood.

may result in malfunction or unexpect-

death, or machine/property damage.

Note: Steps in Installing/Changing Wire and

Adjusting Wire Feed Tension on Page 19 and
21 MUST be completed before Test Run.

To test run machine:

Clear all setup tools away from machine.

1.

2. Ensure ON/OFF switch is in OFF position.

3. Make sure ground clamp is not connected to

any conductive material.

Connect machine to power supply and turn

4.

machine ON.

Point gun away from yourself, bystanders,

5.

or any conductive material. Squeeze trigger
briefly to feed wire through gun.

Verify motor operation by slowly turning wire

6.

feed speed dial. Squeeze trigger briefly to
verify that dial adjusts wire feed speed.

Model G0879 (Mfd. Since 6/19)

Cut excess wire off so stickout is approxi-

7.

mately

Turn machine OFF and disconnect from

8.

power.

1

⁄4".

-17-

SECTION 4: OPERATIONS

The purpose of this overview is to provide the nov­ice machine operator with a basic understanding
of how the machine is used during operation, so
the

discussed later

in this manual

Due to the generic nature of this overview, it is
not intended to be an instructional guide. To learn
more about specific operations, read this entire
manual,

training from experienced
machine operators
outside of this manual by reading "how-to" books,
trade magazines, or websites.

To reduce your risk of
serious injury, read this
entire manual BEFORE

Operation Overview

machine controls/components

are easier to understand.

seek additional

, and do additional research

If you are not experienced with this type
of machine, WE STRONGLY RECOMMEND
that you seek additional training outside of
this manual. Read books/magazines or get
formal training before beginning any proj­ects. Regardless of the content in this sec­tion, Grizzly Industrial will not be held liable
for accidents caused by lack of training.

using machine.

To complete a typical operation, the operator
does the following:

Examines workpiece to make sure it is prop-

1.

erly prepared, suitable and safe for welding
(see Workpiece Inspection on Page 23).

Inspects welder for any damage or exposed

2.

wire, and ensures proper setup.

Wears ANSI-approved welding safety gear,

3.

including welding hood, respirator, gloves,
boots, and long sleeves.

Connects machine to power and turns

4.

machine ON.

Properly connects ground clamp as close as

5.

possible to workpiece, or to metal workbench
where workpiece is mounted and electrically
connected.

Always treat the welding components as if
they carry live welding current, even when
the welder reaches the duty cycle limit and
shuts down. When the welder re-establishes
the welding current, the electrode and work
lead will immediately carry live welding cur­rent. Ignoring this warning could result in
serious personal injury or death.

-18-

Adjusts machine to desired settings.

6.

7. Welds workpiece.

8. Disconnects ground clamp from workpiece,

and places ground clamp and welding gun
away from conductive materials.

Allows welder fan to cool machine.

9.

10. Turns machine OFF and disconnects machine

from power.

Model G0879 (Mfd. Since 6/19)

Installing/Changing

Wire

Generally speaking, the size of wire should be
changed depending on what thickness of metal is
being welded on. Use 0.030" wire for thinner met­als and 0.035" for thicker metals. Wire thickness
primarily affects the depositional rate of the con­sumable metal/amperage, so machine settings
may also need to be adjusted if the wire size has
been changed.

To install/change wire:

1. DISCONNECT MACHINE FROM POWER!

2. Slide latch back to lift top cover and expose

installed wire spool and wire feed driver (see

Assembly on Page 16).

3. Move tension knob up. Then move ten-

sion arm away from wire feed roller (see

Figure 12).

5. Remove wire drive roller by twisting cap

counterclockwise. Lift up to remove cap with
wire drive roller.

6. Compare gauge of wire to slots in wire drive
roller to determine which slot fits best. Large
wire groove fits 0.035" flux-cored wire, and
small groove fits 0.030" flux-cored wire (see
Figure 13).

Wire Drive

Roller

0.035"
Wire

Groove

Figure 13. Wire drive roller.

0.030"
Wire

Groove

Remove end of wire from spool while pinch-

4.

ing roll to prevent unraveling. Cut bent end
of spool. Slide wire through wire guide along
wire drive roller and into wire housing (see
Figure 12).

Wire Drive

Roller Cap

Tension

Knob

Wire

Wire

Housing

Figure 12. Wire installed in wire feed driver.

Tension

Arm

Guide

7. Install wire drive roller so desired slot is on
top, and reattach it to machine with wire drive
roller cap.

Move tension arm against wire, then flip ten-

8.

sion knob down to secure tension arm in
place (see Figure 14).

Tension

Knob

Figure 14. Wire feed driver with wire installed.

Model G0879 (Mfd. Since 6/19)

-19 -

9. Remove gun nozzle, and unscrew contact tip
(see Figure 15).

Gun

Trigger

Figure 15. Nozzle and contact tip removed from

welding gun.

12. Turn machine OFF and disconnect from
power source.

Slide contact tip for appropriate wire gauge

13.

over wire and screw in place. Snug with
needle nose pliers. DO NOT overtighten.

Slide gun nozzle back in place (see Figure 17).

14.

Nozzle

10.

Plug machine into power source. Ensure

ground clamp is not touching conductive
material. Turn machine ON.

Pointing gun away from yourself and any

11.

conductive material, squeeze trigger to begin
feeding wire through machine. Once wire
appears at gun tip, release trigger (see
Figure 16).

Welding

Wire

Contact

Tip

Figure 17. Welding gun components assembled.

-20-

Figure 16. Wire extending from gun.

Model G0879 (Mfd. Since 6/19)

Adjusting

Wire Feed Tension

Wire feed tension must be set properly to ensure
that the welding wire feeds correctly during weld­ing operations.

To adjust wire feed tension:

1. DISCONNECT MACHINE FROM POWER!

Slide latch back to lift top cover and expose

2.

installed wire spool and wire feed driver (see

Assembly on Page 16).

3. Use wire tension knob to adjust wire tension.

Turn knob clockwise to increase tension, and
counterclockwise to decrease tension.

Hand-tighten wire spool nut to apply tension

4.

to wire spool (see Figure 19). Spool should
spin freely when wire is being fed through
machine, but immediately stop after letting go
of trigger to prevent unraveling.

Wire Spool

Nut

Figure 19. Wire spool tension nut.

Note: Wire tension should be tight enough to

prevent wire from slipping in driver wheel, but
not so tight that it cannot feed through assem­bly smoothly. If wire tension is too low, it can
cause wire spool to unravel.

Tension

Knob

Figure 18. Wire feed driver assembly locked.

Once desired wire tension is achieved, close

5.

top cover of machine.

Model G0879 (Mfd. Since 6/19)

-21-

Operation Guidelines Welder Duty Cycle

As the welder produces the desired power output

NOTICE

The following instructions are not intended
to be a complete list of welding steps. To
become a good welder, read books on weld­ing, get help from experienced welders, and
practice.

Although it is beyond the scope of this manual
to instruct how to weld, here are some general
guidelines for successful welding:

• Read and understand this manual and ensure
that all safety instructions are followed.

for the welding operation, power is converted to
heat. In order to protect the welder components
from over-heating, each welder has an estab­lished duty cycle, which varies depending on the
amperage output being used.

A duty cycle is the number of minutes out of 10
minutes that the welder can safely operate at the
current amperage output without over-heating.
For instance, the Model G0879 has a duty cycle
of 20% at 60A output. This means that the welder
can operate continuously for 2
output, then the arc must be stopped to allow the
welder, using the cooling fan, to cool off for at
least 8 minutes before starting the arc again.

minutes at 60A

• Establish a safe and efficient welding envi­ronment, and ensure that you are properly
protected for the welding operation. Ensure
that there is a working fire extinguisher read­ily available.

• Have an experienced welder stand by to
assist if needed.

• Decide which type of weld is correct for your
project and properly prepare metal.

• Choose correct amperage output and be
aware of duty cycle for this amperage.

• Select correct electrode type and size for
your welding project.

• Make sure welding cables and grounds are
secure.

• Stay aware of work environment around
you as you weld and ensure that flying sparks
do not start a fire.

The Model G0879 has a cooling fan and an inter­nal thermostat that will shut the welder down if
the duty cycle is exceeded. This will be evident by
the loss of welding circuit and the orange warn­ing light on the face of the welder will illuminate.
When the welder has cooled sufficiently, the inter­nal thermostat will re-establish the welding circuit
and the orange warning light will go out.

NOTICE

Always keep the power ON to the welder
after completing the welding operation to
let the welder fan cool the welder down. To
avoid damage to your welder, never shut
the power OFF before the welder enclosure
is completely cool to the touch.

• Look slightly ahead of the arc. Even with pro­tection of welder's hood, looking directly at
arc can damage your eyes.

• Listen to sound of the weld. Each type of
weld has its own distinct sound when it is
progressing correctly.

-22-

Model G0879 (Mfd. Since 6/19)

Workpiece Inspection

Basic Operation

Some workpieces are not safe to weld or may
require modification before they are safe to weld.

Before welding, inspect all workpieces for the
following:

• Material Type: This machine is intended for
mild steel welding using flux cored wire. Be
aware of the side affects of welding different
kinds of metals. Take proper precautions and
think about the workpiece you are welding
on. Know what type of material you are work­ing with; welding certain treated metals, such
as galvanized steel, can create severely toxic
fumes.

• Foreign Objects: Paint, grease, chemicals,
rust, and other unwanted substances can
affect the quality and safety of welds. Ensure
work area is free of flammable materials
Make sure the workpiece is clean before
welding, for both the location of the weld and
the ground clamp.

• Sealed containers: DO NOT weld, burn
or heat sealed or pressurized containers.
Observe specific guidelines when welding a
workpiece to ensure safe practice has not
been overlooked.

NOTICE

It is beyond the scope of this manual to
instruct how to properly weld. No manual is
a replacement for formal training or instruc­tion. It is highly recommended that the user
seek formal training with extensive practice.

Becoming familiar with welding techniques and
settings requires practice and experience. Take
time to practice and understand the basic vari­ables of welding techniques and settings.

To perform a basic weld:

Follow all safety guidelines to ensure envi-

1.

ronment and workpiece are safe for welding
practice (see Workpiece Inspection, and
Safety on Page 8).

Wear all recommended and approved welding

2.

safety gear, including welding hood, gloves,
long sleeves, and boots (see Additional
Safety for Welders on Page 10).

Connect ground clamp to workpiece, near

3.

intended location of weld.

Plug in welder and turn machine ON.

4.

Model G0879 (Mfd. Since 6/19)

. Point gun away from yourself and any con-

5

ductive material. Squeeze trigger to release
welding wire. Cut back wire to about
out from contact tip (see Figure 20).

1

⁄4"

Figure 20. Welding wire stick-out.

1

⁄4" stick-

-23-

6.

Set desired settings for type of intended weld

(see Figure 21).

Figure 21. Welding specification chart.

7.

Position welding gun so it is aimed perpen-

dicular to intended weld location.

Note: Wire electrode has a live electrical cur-

rent when machine is turned ON and will arc
immediately when wire makes contact with
grounded workpiece. Trigger will only begin
to feed wire out of gun.

Squeeze trigger so wire begins to feed

9.

into weld. Once wire makes contact with
workpiece, arc will start and weld pool will
begin to form. Maintain consistent dis­tance between contact tip and workpiece of

3

⁄16"—1⁄4" (see Figure 23).

Note: Keep welding gun cable as straight as

possible so as to not inhibit wire feed.

<3⁄16"

3

⁄16"-1⁄4" >1⁄4"

Tilt gun 15–20° along direction of weld to

8.

allow better visibility of weld location (see
Figure 22).

Note: Flux core welds can be made by "drag-

ging," "pushing," or staying perpendicular to
weld. However, it is generally recommended
that the operator utilize the "dragging" tech­nique to avoid slag inclusions in welds.

15°

Push

Perpendicular

15°

Drag

(Welding Direction)

Bad BadGood

Figure 23. Contact tip to work distance.

10.

Watch molten weld pool form. Controlling

weld pool with welding gun will dictate how
weld bead forms. Size of weld pool dictates
how fast to move welding gun.

— If weld burns through workpiece, either

move gun faster or set machine to “LOW”
amperage setting.

— If base metal is not being penetrated by

weld, either slow down gun travel speed or
set machine to “HIGH” amperage setting.

11. When weld is complete, release trigger on
welding gun to stop weld.

Allow machine to cool, then turn machine

12.

OFF.

-24-

Figure 22. Welding angle.

Model G0879 (Mfd. Since 6/19)

Welding Tips

The following list includes good practices for
welding. The list is by no means exhaustive, but
contains some basic tips to aid the user in devel­oping better welding skills by focusing on contact
tip to work distance, gun angle, travel speed, wire
speed, amperage output, and slag coverage.

For Flux Core Arc Welding (FCAW):

• Contact Tip to Work Distance: Too short of
contact tip to work distance can cause burn­back and poor slag coverage. Too long of
distance will cause stubbing and inconsistent
welds.

• Gun Angle: Too aggressive of a gun angle will
cause wire to blowout the weld puddle, mak­ing it globby and inconsistent. Sometimes,
too minimal of weld angle can cause slag
inclusions in welds, causing weak points.

• Wire Speed: Wire speed is strongly related
to amperage, but it has more to do with weld
heat. Too high of wire speed can cause stub­bing and poor slag coverage. Too low of wire
speed can cause globby welds with lots of
spatter.

• Amperage Output: Amperage is strongly
related to wire speed, but it has more to do
with weld penetration. Too high of amperage
output tends to yield deeper weld penetration
and burn-through, whereas too low of amper­age can cause bad bonding between weld
and workpiece with lots of spatter.

• Slag Coverage: As flux melts during the
welding process, it is redeposited as slag on
top of the weld bead. Ideally, FCAW welds
will have consistent and even slag coverage
to properly protect the weld from contamina­tion while cooling. Never weld on top of slag;
always remove before making another weld.

• Gun Travel Speed: Too slow of gun travel
speed can cause built-up and convex welds
with bad slag coverage. Too fast of gun travel
speed can cause narrow, globby welds with
minimal penetration.

Model G0879 (Mfd. Since 6/19)

-25-

SECTION 5: ACCESSORIES

Installing unapproved accessories may

order online at www.grizzly.com or call 1-800-523-4777

cause machine to malfunction, resulting in
serious personal injury or machine damage.
To reduce this risk, only install accessories
recommended for this machine by Grizzly.

NOTICE

Refer to our website or latest catalog for
additional recommended accessories.

H7439—Kinco - 20" Welding Bib

This welding bib measures 22" wide by 20" long
and features an adjustable waist strap.

T30316—Metal Man - Black Variable Shade
Auto-Darkening Welding Helmet

Designed to protect the eye and face from sparks,
spatter, and harmful radiation under normal weld­ing conditions.

Figure 24. H7439 Welding Bib.

Figure 25. T30316 Auto-Darkening Welding

Helmet.

H7436 —Kinco Cape Sleeves

Double-stitched with Kevlar heat-resistant thread
for durability; adjustable wrists and waist fit.

Figure 26. H7436 Kinco Cape Sleeves.

-26-

Model G0879 (Mfd. Since 6/19)

order online at www.grizzly.com or call 1-800-523-4777

T31558—Kinco Premium Cowhide Welding
Gloves

Made with premium grade split cowhide leather,
and sewn with cut/heat resistant thread.

Figure 27. T31558 Welding Gloves.

T28932—36" x 24" Welding Table

Creating the perfect weld requires a rock-solid
work surface, and this welding table offers the
rigidity you need.

T32085—Welding Respirator Kit (Medium)

The T32085 Welding Respirator Kit is a size
medium respirator providing protection for certain
particulates found in welding at concentrations up
to 10 times the Permissible Exposure Level (PEL).

NIOSH approved for P100. The P100 pancake
filters provide at least 99.97% filtration efficiency
against solid and liquid aerosols, including oil­based aerosols.

A layer of activated carbon provides relief from
the irritating effects of nuisance levels of ozone,
organic vapors and acid gases.

Simply install your clamp system or custom jig in
the conveniently spaced 16mm holes, and you're
ready to weld! The all-steel construction and table
top overhang make connecting a grounding clamp
fast and easy. Made of 9-gauge steel.

Figure 28. T28932 Welding Table.

Figure 29. T32085 Welding Respirator Kit.

T31756—Arrow Welding Magnet, 75 lb.

Use for welding, soldering, and assembly. Multi­angle design can be used at 45°, 90°, or 135°.
Capacity: 75 lbs.

Figure 30. T31756 Arrow Welding Magnet.

Model G0879 (Mfd. Since 6/19)

-27-

order online at www.grizzly.com or call 1-800-523-4777

T31740 and T31741— U.S. Forge E71T-GS Flux
Cored Wire - 2 lb.

Use Flux Cored Wire to create strong, clean
welds, with a smooth surface for efficient wire
feed. Features minimal spatter and easy slag
cleanup. Comes in 0.030" and 0.035" diameter.

Figure 31. T31740 .030" Flux-Cored Wire.

T3117 3— 9" Locking Welding Clamp

Milwaukee® Torque Lock™ locking tools provide
faster setup and more locking force for the pro­fessional tradesmen. The patent pending thumb
screw provides the user with a more convenient
geometry for hand force, while providing clear­ance to generate more torque with the unique
screwdriver through-hole design.

T30369 and T30370—Contact Tips

Contact Tip for use with the G0879 Flux Core Mig
Welder. Sizes .030" and .035".

Figure 34. T30369 0.030” contact tip for G0879.

T30368—MIG Gas Diffuser

MIG Gas Diffuser for holding contact tip on G0879
Flux Core MIG Welder.

Figure 33. T30368 Diffuser for G0879.

Figure 32. T31173 Locking Welding Clamp.

-28-

Model G0879 (Mfd. Since 6/19)

T30371—MIG Nozzle

order online at www.grizzly.com or call 1-800-523-4777

MIG Nozzle for use with the G0879 Welder.

T30367—Torch Neck for G0879

Torch Neck for use with the G0879 Welder.

Figure 35. T30371 Nozzle for G0879.

Figure 36. T30367 Torch Neck for G0879.

Model G0879 (Mfd. Since 6/19)

-29-

SECTION 6: MAINTENANCE

To reduce risk of shock or
accidental startup, always
disconnect machine from
power before adjustments,

maintenance, or service.

Schedule

For optimum performance from this machine, this
maintenance schedule must be strictly followed.

Ongoing

To minimize your risk of injury and maintain proper
machine operation, shut down the machine imme­diately if you ever observe any of the items below,
and fix the problem before continuing operations:

3. Remove (8) Phillips head screws from left
machine panel (see Figure 37).

Figure 37. Removing left side panel.

4. Remove clear fuse cover on circuit board

labeled "FUSE" (see Figure 38).

• Damaged components.

• Worn or damaged wires.
Spatter buildup on welding gun tip.

•
Any other unsafe condition.

•

Weekly Maintenance

• Dust and dirt build up in machine and cooling

fan.

Replacing Fuse

If the machine stops functioning, it is possible that
the machine may have blown a fuse.

To replace fuse on welder:

DISCONNECT MACHINE FROM POWER!

1.

Raise top cover of machine, as shown in

2.

Assembly on Page 16.

Fuse

Cover

Figure 38. Location of clear fuse cover.

5. Remove and inspect machine fuse. If fuse is

damaged or burnt, replace with new fuse. If
fuse appears to be in good condition, replace
and see Troubleshooting on Page 31 for
other possible problems.

. Replace clear cap over fuse.

6

-30-

7. Re-install left side panel.

Model G0879 (Mfd. Since 6/19)

Review the troubleshooting procedures in this section if a problem develops with your machine. If you need

the

serial number and manufacture date of your machine before calling.

SECTION 7: SERVICE

replacement parts or additional help with a procedure, call our Technical Support. Note: Please gather

Troubleshooting

Motor & Electrical

Symptom Possible Cause Possible Solution

Machine does
not start, or
power supply
breaker
immediately
trips after
startup.

Wire does not
feed properly or
does not feed
at all.

1. Thermal overload has tripped/duty cycle
exceeded.

2. Incorrect power supply voltage or circuit size.

3. Power supply circuit breaker tripped or fuse
blown.

4. Blown fuse.

5. Wiring broken, disconnected or corroded.

6. ON/OFF switch at fault.

1. Machine has run out of wire.

2. Incorrect contact tip size.

3. Insufficient wire feed spring tension.

4. Wire guide sheath/contact tip in welding torch
assembly is blocked.

5. Wire spool nut is too tight/too loose.

6. Wire spool has oxidized or poorly wound wire.

1. Rest. Allow machine to cool with fan ON (Page 22).

2. Ensure correct power supply voltage and circuit size.

3. Ensure circuit is free of shorts. Reset circuit breaker or
replace fuse (see Page 30).

4. Replace fuse/ensure no shorts.

5. Fix broken wires or disconnected/corroded
connections.

6. Replace switch.

1. Replace welding wire spool (Page 16).

2. Match contact tip to wire gauge.

3. Tighten tension knob (Page 21).

4. Clean wire sheath; replace contact tip; replace welding
torch assembly.

5. Adjust nut so spool moves freely (Page 16).

6. Replace welding wire spool (Page 16).

Reduced
welding power.

Inconsistent
welding circuit.

7. Wire burned back and welded to contact tip.

8. Duty cycle exceeded.

9. Drive roller groove does not match wire
gauge.

1. Ground cable is not connected or is poorly
connected.

2. One or more rectifiers failed.

3. If using extension cord, cord is too long.

1. Improperly cleaned workpiece/ wrong type of
material.

2. Incorrect size of contact tip for wire.

3. Contact tip loose.

4. Contact tip damaged.

5. Feed rollers are worn.

6. Welding wire corroded.

7. Ground clamp not connected to workpiece/
too far from weld location/bad ground
connection.

7. Replace contact tip. DO NOT run trigger. This will
unravel wire spool.

8. Leave machine plugged in; allow to cool until orange
light goes out, then attempt to power up machine again.

9. Match drive roller groove to wire gauge (Page 21).

1. Check ground cable for proper connection (Page 13).

2. A qualified welding technician should open unit and
check for burnt rectifiers.

3. Use a shorter extension cord or none at all.

1. Clean workpiece/ use correct type of material.

2. Replace with correct contact tip (Page 20).

3. Tighten contact tip.

4. Replace with new contact tip.

5. Replace worn components.

6. Replace welding wire spool (Page 16).

7. Connect the ground clamp close to your workpiece.
Make sure ground clamp is connected/terminals are
clean.

Model G0879 (Mfd. Since 6/19)

-31-

Difficulty/
inability to
properly start/
arc a weld.

Burning holes
in workpiece.

Lack of weld
penetration.

Unable to
maintain
constant arc;
excessive
spatter.

1. Improperly cleaned workpiece/ wrong type of
material.

2. Ground clamp not connected to workpiece/
too far from weld location/bad ground
connection.

3. Machine settings incorrect for workpiece.

4. Residue build up at end of wire insulates
electrode and makes starting arc difficult.

1. Material too thin for welding operation.

2. Welding amperage output too high.

3. Wire speed too high.

4. Welding torch moved too slow.

5. Contact tip to workpiece distance to long.

1. Improperly cleaned workpiece/ wrong type
of material/ material too thick for welding
operation.

2. Welding output amperage too low.

3. Wire speed too slow.

4. Welding torch moved too quick.

5. Contact tip to workpiece distance to short.

1. Contact tip to workpiece distance too long.

2. Ground clamp not connected to workpiece/
too far from weld location/bad ground
connection.

3. Welding output amperage too high.

4. Wire speed too high.

5. Welding torch moved too slow.

1. Clean workpiece/ use correct type of material.

2. Connect ground clamp close to workpiece. Make
sure ground clamp is connected/terminals are clean
(Page 13).

3. Adjust machine settings to be appropriate for
workpiece (Page 25).

4. Break/cut tip of wire off before beginning weld.

1. Use thicker material. Not recommended to weld
material thinner than 1⁄16" steel with G0879 (Page 7).

2. Lower amperage output.

3. Reduce wire speed.

4. Increase welding torch travel speed.

5. Maintain contact tip to workpiece distance of 3⁄16"-1⁄4"
(Page 24).

1. Clean workpiece/ use correct type of material/
maximum material thickness for G0879 is 3⁄16" steel
(Page 7).

2. Increase amperage output.

3. Increase wire speed.

4. Decrease welding torch travel speed.

5. Maintain contact tip to workpiece distance of 3⁄16"-1⁄4"
(Page 24).

1. Maintain appropriate contact tip to workpiece distance
throughout entire weld.

2. Connect ground clamp close to workpiece. Make
sure ground clamp is connected/terminals are clean
(Page 13).

3. Lower amperage output.

4. Reduce wire speed.

5. Increase welding torch travel speed.

-32-

Model G0879 (Mfd. Since 6/19)

WARRANTY & RETURNS

Grizzly Industrial, Inc. warrants every product it sells for a period of 1 year to the original purchaser from
the date of purchase. This warranty does not apply to defects due directly or indirectly to misuse, abuse,
negligence, accidents, repairs or alterations or lack of maintenance. This is Grizzly’s sole written warranty
and any and all warranties that may be implied by law, including any merchantability or fitness, for any par­ticular purpose, are hereby limited to the duration of this written warranty. We do not warrant or represent
that the merchandise complies with the provisions of any law or acts unless the manufacturer so warrants.
In no event shall Grizzly’s liability under this warranty exceed the purchase price paid for the product and
any legal actions brought against Grizzly shall be tried in the State of Washington, County of Whatcom.

We shall in no event be liable for death, injuries to persons or property or for incidental, contingent, special,
or consequential damages arising from the use of our products.

The manufacturers reserve the right to change specifications at any time because they constantly strive to
achieve better quality equipment. We make every effort to ensure that our products meet high quality and
durability standards and we hope you never need to use this warranty.

In the event you need to use this warranty, contact us by mail or phone and give us all the details. We will
then issue you a “Return Number,’’ which must be clearly posted on the outside as well as the inside of
the carton. We will not accept any item back without this number. Proof of purchase must accompany the
merchandise.

Please feel free to write or call us if you have any questions about the machine or the manual.

Thank you again for your business and continued support. We hope to serve you again soon.

To
you can
applicable information for

take advantage of this warranty, you must register it at https://www.grizzly.com/forms/warranty, or

scan the QR code below to be automatically directed to our warranty registration page. Enter all

the product.

WARRANTY