Lincoln Electric IM930 User Manual [en, de, es, fr]

IM930

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RED-D-ARC
GX 300

For use with machines having Code Numbers:

November, 2006

11425

OPERATOR’S MANUAL

Red-D-Arc Spec-Built Welding Equipment

This RED-D-ARC welder is built to RED-D-ARC Extreme Duty
design specifications by Lincoln Electric.

Safety Depends on You

This welder is designed and built with safety in mind.

However, your overall safety can be increased by proper installation

... and thoughtful operation on your part.

DO NOT INSTALL, OPERATE OR REPAIR THIS EQUIPMENT
WITHOUT READING THIS MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED THROUGHOUT.

And, most importantly, think before you act and be careful.

1-800-245-3660

North America’s Largest Fleet of Welding Equipment

i

SAFETY

i

WARNING

CALIFORNIA PROPOSITION 65 WARNINGS

Diesel engine exhaust and some of its constituents
are known to the State of California to cause can­cer, birth defects, and other reproductive harm.

The Above For Diesel Engines

ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH.
KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.

Read and understand the following safety highlights. For additional safety information, it is strongly recommended that you
purchase a copy of “Safety in Welding & Cutting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box
351040, Miami, Florida 33135 or CSA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available
from the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.

BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE
PERFORMED ONLY BY QUALIFIED INDIVIDUALS.

The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.

The Above For Gasoline Engines

FOR ENGINE
powered equipment.

1.a. Turn the engine off before troubleshooting and maintenance
work unless the maintenance work requires it to be running.

____________________________________________________

1.b. Operate engines in open, well-ventilated
areas or vent the engine exhaust fumes
outdoors.

____________________________________________________

1.c. Do not add the fuel near an open flame
welding arc or when the engine is running.
Stop the engine and allow it to cool before
refueling to prevent spilled fuel from vaporiz­ing on contact with hot engine parts and
igniting. Do not spill fuel when filling tank. If
fuel is spilled, wipe it up and do not start
engine until fumes have been eliminated.

____________________________________________________

1.d. Keep all equipment safety guards, covers and devices in
position and in good repair.Keep hands, hair, clothing and
tools away from V-belts, gears, fans and all other moving
parts when starting, operating or repairing equipment.

____________________________________________________

1.e. In some cases it may be necessary to remove safety

guards to perform required maintenance. Remove
guards only when necessary and replace them when the
maintenance requiring their removal is complete.
Always use the greatest care when working near moving
parts.

___________________________________________________

1.f. Do not put your hands near the engine fan.
Do not attempt to override the governor or
idler by pushing on the throttle control rods
while the engine is running.

1.h. To avoid scalding, do not remove the
radiator pressure cap when the engine is
hot.

ELECTRIC AND
MAGNETIC FIELDS
may be dangerous

2.a. Electric current flowing through any conductor causes
localized Electric and Magnetic Fields (EMF). Welding
current creates EMF fields around welding cables and
welding machines

2.b. EMF fields may interfere with some pacemakers, and
welders having a pacemaker should consult their physician
before welding.

2.c. Exposure to EMF fields in welding may have other health
effects which are now not known.

2.d. All welders should use the following procedures in order to
minimize exposure to EMF fields from the welding circuit:

2.d.1.

Route the electrode and work cables together - Secure
them with tape when possible.

2.d.2. Never coil the electrode lead around your body.

2.d.3. Do not place your body between the electrode and

work cables. If the electrode cable is on your right
side, the work cable should also be on your right side.

___________________________________________________

1.g. To prevent accidentally starting gasoline engines while
turning the engine or welding generator during maintenance
work, disconnect the spark plug wires, distributor cap or
magneto wire as appropriate.

2.d.4. Connect the work cable to the workpiece as close as
possible to the area being welded.

2.d.5. Do not work next to welding power source.

Mar ‘95

GX 300

ii

SAFETY

ii

ELECTRIC SHOCK can
kill.

3.a. The electrode and work (or ground) circuits
are electrically “hot” when the welder is on.
Do not touch these “hot” parts with your bare
skin or wet clothing. Wear dry, hole-free

gloves to insulate hands.

3.b. Insulate yourself from work and ground using dry insulation.
Make certain the insulation is large enough to cover your full
area of physical contact with work and ground.

In addition to the normal safety precautions, if welding
must be performed under electrically hazardous
conditions (in damp locations or while wearing wet
clothing; on metal structures such as floors, gratings or
scaffolds; when in cramped positions such as sitting,
kneeling or lying, if there is a high risk of unavoidable or
accidental contact with the workpiece or ground) use
the following equipment:

• Semiautomatic DC Constant Voltage (Wire) Welder.

• DC Manual (Stick) Welder.

• AC Welder with Reduced Voltage Control.

3.c. In semiautomatic or automatic wire welding, the electrode,
electrode reel, welding head, nozzle or semiautomatic
welding gun are also electrically “hot”.

3.d. Always be sure the work cable makes a good electrical
connection with the metal being welded. The connection
should be as close as possible to the area being welded.

3.e. Ground the work or metal to be welded to a good electrical
(earth) ground.

ARC RAYS can burn.

4.a. Use a shield with the proper filter and cover
plates to protect your eyes from sparks and
the rays of the arc when welding or observing
open arc welding. Headshield and filter lens
should conform to ANSI Z87. I standards.

4.b. Use suitable clothing made from durable flame-resistant
material to protect your skin and that of your helpers from
the arc rays.

4.c. Protect other nearby personnel with suitable, non-flammable
screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.

FUMES AND GASES
can be dangerous.

5.a. Welding may produce fumes and gases
hazardous to health. Avoid breathing these
fumes and gases.When welding, keep
your head out of the fume. Use enough
ventilation and/or exhaust at the arc to keep

fumes and gases away from the breathing zone. When

welding with electrodes which require special
ventilation such as stainless or hard facing (see
instructions on container or MSDS) or on lead or
cadmium plated steel and other metals or coatings
which produce highly toxic fumes, keep exposure as
low as possible and below Threshold Limit Values (TLV)
using local exhaust or mechanical ventilation. In
confined spaces or in some circumstances, outdoors, a
respirator may be required. Additional precautions are
also required when welding on galvanized steel.

3.f.

Maintain the electrode holder, work clamp, welding cable and
welding machine in good, safe operating condition. Replace
damaged insulation.

3.g. Never dip the electrode in water for cooling.

3.h. Never simultaneously touch electrically “hot” parts of
electrode holders connected to two welders because voltage
between the two can be the total of the open circuit voltage
of both welders.

3.i. When working above floor level, use a safety belt to protect
yourself from a fall should you get a shock.

3.j. Also see Items 6.c. and 8.

5. b. The operation of welding fume control equipment is affected
by various factors including proper use and positioning of
the equipment, maintenance of the equipment and the spe­cific welding procedure and application involved. Worker
exposure level should be checked upon installation and
periodically thereafter to be certain it is within applicable
OSHA PEL and ACGIH TLV limits.

5.c.

Do not weld in locations near chlorinated hydrocarbon
coming from degreasing, cleaning or spraying operations.
The heat and rays of the arc can react with solvent vapors
form phosgene, a highly toxic gas, and other irritating prod­ucts.

5.d. Shielding gases used for arc welding can displace air and

cause injury or death. Always use enough ventilation,
especially in confined areas, to insure breathing air is safe.

5.e. Read and understand the manufacturer’s instructions for this

equipment and the consumables to be used, including the
material safety data sheet (MSDS) and follow your
employer’s safety practices. MSDS forms are available from
your welding distributor or from the manufacturer.

5.f. Also see item 1.b.

vapors

AUG 06

to

GX 300

iii

SAFETY

iii

WELDING SPARKS can
cause fire or explosion.

6.a.

Remove fire hazards from the welding area.

If this is not possible, cover them to prevent

the welding sparks from starting a fire.

materials from welding can easily go through small cracks
and openings to adjacent areas. Avoid welding near
hydraulic lines. Have a fire extinguisher readily available.

6.b. Where compressed gases are to be used at the job site,
special precautions should be used to prevent hazardous
situations. Refer to “Safety in Welding and Cutting” (ANSI
Standard Z49.1) and the operating information for the
equipment being used.

6.c. When not welding, make certain no part of the electrode
circuit is touching the work or ground. Accidental contact
can cause overheating and create a fire hazard.

6.d. Do not heat, cut or weld tanks, drums or containers until the
proper steps have been taken to insure that such procedures
will not cause flammable or toxic vapors from substances
inside. They can cause an explosion even
been “cleaned”. For information, purchase “Recommended
Safe Practices for the
Containers and Piping That Have Held Hazardous
Substances”, AWS F4.1 from the American Welding Society

(see address above).

6.e. Vent hollow castings or containers before heating, cutting or
welding. They may explode.

Sparks and spatter are thrown from the welding arc. Wear oil

6.f.
free protective garments such as leather gloves, heavy shirt,
cuffless trousers, high shoes and a cap over your hair. Wear
ear plugs when welding out of position or in confined places.
Always wear safety glasses with side shields when in a
welding area.

6.g. Connect the work cable to the work as close to the welding
area as practical. Work cables connected to the building
framework or other locations away from the welding area
increase the possibility of the welding current passing
through lifting chains, crane cables or other alternate cir­cuits. This can create fire hazards or overheat lifting chains
or cables until they fail.

6.h. Also see item 1.c.

Remember that welding sparks and hot

though

they have

Preparation

for Welding and Cutting of

CYLINDER may explode
if damaged.

7.a. Use only compressed gas cylinders
containing the correct shielding gas for the
process used and properly operating
regulators designed for the gas and

pressure used. All hoses, fittings, etc. should be suitable for
the application and maintained in good condition.

7.b. Always keep cylinders in an upright position securely
chained to an undercarriage or fixed support.

7.c. Cylinders should be located:

• Away from areas where they may be struck or subjected to

physical damage.

• A safe distance from arc welding or cutting operations and

any other source of heat, sparks, or flame.

7.d. Never allow the electrode, electrode holder or any other
electrically “hot” parts to touch a cylinder.

7.e. Keep your head and face away from the cylinder valve outlet
when opening the cylinder valve.

7.f. Valve protection caps should always be in place and hand
tight except when the cylinder is in use or connected for
use.

7.g. Read and follow the instructions on compressed gas
cylinders, associated equipment, and CGA publication P-l,
“Precautions for Safe Handling of Compressed Gases in
Cylinders,” available from the Compressed Gas Association
1235 Jefferson Davis Highway, Arlington, VA 22202.

FOR ELECTRICALLY
powered equipment.

8.a. Turn off input power using the disconnect
switch at the fuse box before working on
the equipment.

8.b. Install equipment in accordance with the U.S. National
Electrical Code, all local codes and the manufacturer’s
recommendations.

8.c. Ground the equipment in accordance with the U.S. National
Electrical Code and the manufacturer’s recommendations.

Mar ‘95

GX 300

iv

SAFETY

iv

PRÉCAUTIONS DE SÛRETÉ

Pour votre propre protection lire et observer toutes les instructions
et les précautions de sûreté specifiques qui parraissent dans ce
manuel aussi bien que les précautions de sûreté générales suiv­antes:

Sûreté Pour Soudage A L’Arc

1. Protegez-vous contre la secousse électrique:

a. Les circuits à l’électrode et à la piéce sont sous tension

quand la machine à souder est en marche. Eviter toujours
tout contact entre les parties sous tension et la peau nue
ou les vétements mouillés. Porter des gants secs et sans
trous pour isoler les mains.

b. Faire trés attention de bien s’isoler de la masse quand on

soude dans des endroits humides, ou sur un plancher
metallique ou des grilles metalliques, principalement dans
les positions assis ou couché pour lesquelles une grande
partie du corps peut être en contact avec la masse.

c. Maintenir le porte-électrode, la pince de masse, le câble

de soudage et la machine à souder en bon et sûr état
defonctionnement.

d.Ne jamais plonger le porte-électrode dans l’eau pour le

refroidir.

e. Ne jamais toucher simultanément les parties sous tension

des porte-électrodes connectés à deux machines à souder
parce que la tension entre les deux pinces peut être le
total de la tension à vide des deux machines.

f. Si on utilise la machine à souder comme une source de

courant pour soudage semi-automatique, ces precautions
pour le porte-électrode s’applicuent aussi au pistolet de
soudage.

6. Eloigner les matériaux inflammables ou les recouvrir afin de
prévenir tout risque d’incendie dû aux étincelles.

7. Quand on ne soude pas, poser la pince à une endroit isolé de
la masse. Un court-circuit accidental peut provoquer un
échauffement et un risque d’incendie.

8. S’assurer que la masse est connectée le plus prés possible
de la zone de travail qu’il est pratique de le faire. Si on place
la masse sur la charpente de la construction ou d’autres
endroits éloignés de la zone de travail, on augmente le risque
de voir passer le courant de soudage par les chaines de lev­age, câbles de grue, ou autres circuits. Cela peut provoquer
des risques d’incendie ou d’echauffement des chaines et des
câbles jusqu’à ce qu’ils se rompent.

9. Assurer une ventilation suffisante dans la zone de soudage.
Ceci est particuliérement important pour le soudage de tôles
galvanisées plombées, ou cadmiées ou tout autre métal qui
produit des fumeés toxiques.

10. Ne pas souder en présence de vapeurs de chlore provenant
d’opérations de dégraissage, nettoyage ou pistolage. La
chaleur ou les rayons de l’arc peuvent réagir avec les vapeurs
du solvant pour produire du phosgéne (gas fortement toxique)
ou autres produits irritants.

11. Pour obtenir de plus amples renseignements sur la sûreté,
voir le code “Code for safety in welding and cutting” CSA
Standard W 117.2-1974.

2. Dans le cas de travail au dessus du niveau du sol, se protéger
contre les chutes dans le cas ou on recoit un choc. Ne jamais
enrouler le câble-électrode autour de n’importe quelle partie
du corps.

3. Un coup d’arc peut être plus sévère qu’un coup de soliel,
donc:

a. Utiliser un bon masque avec un verre filtrant approprié

ainsi qu’un verre blanc afin de se protéger les yeux du ray­onnement de l’arc et des projections quand on soude ou
quand on regarde l’arc.

b. Porter des vêtements convenables afin de protéger la

peau de soudeur et des aides contre le rayonnement de
l‘arc.

c. Protéger l’autre personnel travaillant à proximité au

soudage à l’aide d’écrans appropriés et non-inflammables.

4. Des gouttes de laitier en fusion sont émises de l’arc de
soudage. Se protéger avec des vêtements de protection libres
de l’huile, tels que les gants en cuir, chemise épaisse, pan­talons sans revers, et chaussures montantes.

5. Toujours porter des lunettes de sécurité dans la zone de
soudage. Utiliser des lunettes avec écrans lateraux dans les
zones où l’on pique le laitier.

PRÉCAUTIONS DE SÛRETÉ POUR
LES MACHINES À SOUDER À
TRANSFORMATEUR ET À
REDRESSEUR

1. Relier à la terre le chassis du poste conformement au code de
l’électricité et aux recommendations du fabricant. Le dispositif
de montage ou la piece à souder doit être branché à une
bonne mise à la terre.

2. Autant que possible, I’installation et l’entretien du poste seront
effectués par un électricien qualifié.

3. Avant de faires des travaux à l’interieur de poste, la debranch­er à l’interrupteur à la boite de fusibles.

4. Garder tous les couvercles et dispositifs de sûreté à leur
place.

Mar. ‘93

GX 300

vv

Thank You

for selecting a QUALITY product . We want you to take pride in
operating this ••• as much pride as we have in bringing this prod­uct to you!

Please Examine Carton and Equipment For Damage Immediately

When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claims
for material damaged in shipment must be made by the purchaser against the transportation company at the
time the shipment is received.

Please record your equipment identification information below for future reference. This information can be
found on your machine nameplate.

Product _________________________________________________________________________________

Model Number ___________________________________________________________________________

Code Number or Date Code_________________________________________________________________

Serial Number____________________________________________________________________________

Date Purchased___________________________________________________________________________

Where Purchased_________________________________________________________________________

Whenever you request replacement parts or information on this equipment, always supply the information you
have recorded above. The code number is especially important when identifying the correct replacement parts.

On-Line Product Registration

- Register your machine with Lincoln Electric either via fax or over the Internet.

• For faxing: Complete the form on the back of the warranty statement included in the literature packet
accompanying this machine and fax the form per the instructions printed on it.

• For On-Line Registration: Go to our

“Product Registration”. Please complete the form and submit your registration.

Read this Operators Manual completely before attempting to use this equipment. Save this manual and keep it
handy for quick reference. Pay particular attention to the safety instructions we have provided for your protection.
The level of seriousness to be applied to each is explained below:

WEB SITE at www.lincolnelectric.com. Choose “Quick Links” and then

WARNING

This statement appears where the information must be followed exactly to avoid serious personal injury or
loss of life.

CAUTION

This statement appears where the information must be followed to avoid minor personal injury or damage to
this equipment.

vi

TABLE OF CONTENTS

Page

Installation.......................................................................................................................Section A

Technical Specifications.......................................................................................................A-1

Machine Specifications ........................................................................................................A-2

Safety Precautions ........................................................................................................A-3

Location and Ventilation................................................................................................A-3

Stacking ........................................................................................................................A-3

Angle of Operation ........................................................................................................A-3

Lifting.............................................................................................................................A-3

Additional Safety Precautions .......................................................................................A-3

High Altitude Operation .................................................................................................A-3

High Temperature Operation ........................................................................................A-3

Towing...........................................................................................................................A-3

Vehicle Mounting...........................................................................................................A-4

Pre-Operation Engine Service..............................................................................................A-4

Oil..................................................................................................................................A-4

Fuel ...............................................................................................................................A-4

Engine Coolant..............................................................................................................A-4

Battery Connections......................................................................................................A-4

Muffler Outlet Pipe ........................................................................................................A-4

Spark Arrester ...............................................................................................................A-4

High Frequency Generators for Tig Applications ..........................................................A-5

Remote Control .............................................................................................................A-5

Electrical Connections..........................................................................................................A-5

Machine Grounding.......................................................................................................A-5

Welding Terminals ........................................................................................................A-5

Welding Output Cables .................................................................................................A-5

Cable Installation...........................................................................................................A-6

Auxiliary Power Receptacles and Plugs...............................................................................A-6

Standby Power Connections ................................................................................................A-6

Premises Wiring ...................................................................................................................A-7

Connection of Lincoln Electric Wire Feeders .......................................................................A-8

_______________________________________________________________________________

Operation.........................................................................................................................Section B

Safety Precautions ..............................................................................................................B-1

General Description..............................................................................................................B-1

Design Features ...................................................................................................................B-1

Engine Operation..................................................................................................................B-1

Fuel ......................................................................................................................................B-1

Welder Controls ............................................................................................................B-2

Engine Controls.............................................................................................................B-3

Starting and Stopping the Engine .................................................................................B-3

Stopping .......................................................................................................................B-4

Welding Operation................................................................................................................B-4

DC Stick Welding ..........................................................................................................B-4

Constant Current (Stick) Welding..................................................................................B-4

Pipe Welding .................................................................................................................B-4

Fuel Consumption .........................................................................................................B-4

Tig Welding ...................................................................................................................B-5

Typical Current Ranges for Tungsten Electrodes .........................................................B-5

Wire Welding-CV...........................................................................................................B-5

Arc Gouging ..................................................................................................................B-6

Auxiliary Power .............................................................................................................B-6

Simultaneous Welding and Auxiliary Power Loads.......................................................B-6

Extension Cord Recommendations...............................................................................B-6

Auxiliary Power .............................................................................................................B-6

Simultaneous Welding and Auxiliary Power Loads.......................................................B-6

________________________________________________________________________

Accessories.....................................................................................................Section C

Options / Accessories and Compatible Lincoln Equipment.................................................C-1

________________________________________________________________________________

vi

vii

TABLE OF CONTENTS

Maintenance......................................................................................................Section D

Safety Precautions ................................................................................................D-1

Routine Maintenance ............................................................................................D-1

Kohler Engine........................................................................................................D-1

Engine Maintenance Components ........................................................................D-1

Engine Oil Change..........................................................................................D-2

Engine Oil Refill Capacities.............................................................................D-2

Engine Filter Change ......................................................................................D-2

Air Cleaner Service .........................................................................................D-2

Air Pre-Cleaner Service ..................................................................................D-2

Air Filter Paper Element ........................................................................................D-3

Spark Plug ......................................................................................................D-3

Spark Plug Service .........................................................................................D-3

Fuel Filter ........................................................................................................D-4

Engine Adjustment ..........................................................................................D-4

Battery Maintenance .......................................................................................D-4

Servicing Optional Spark Arrestor ...................................................................D-4

Welder / Generator Maintenance ........................................................................D-5

Storage ...........................................................................................................D-5

Cleaning..........................................................................................................D-5

Brush Removal and Replacement ..................................................................D-5

________________________________________________________________________

Troubleshooting..............................................................................................Section E

How to Use Troubleshooting Guide.......................................................................E-1

Troubleshooting Guide ..........................................................................................E-2

Troubleshooting Guide ..........................................................................................E-3

Troubleshooting Guide ..........................................................................................E-4

Troubleshooting Guide ..........................................................................................E-5

________________________________________________________________________

Diagrams and Dimension Print ......................................................................Section F

________________________________________________________________________

Parts List.................................................................................................................P-493

________________________________________________________________________

vii

A-1

INSTALLATION

TECHNICAL SPECIFICATIONS - GX300 (K2284-2)

INPUT - GASOLINE ENGINE

Make/Model Description Speed (RPM) Displacement Starting Capacities

cu. in. (cu. cm.) System

A-1

Kohler CH23S Starter 45.4 L

2 cylinder High Idle 3700 41(674)

23 HP @
3600 RPM Full Load 3500 cold crank amps) 1.9 L
Gasoline
Engine

Bore x Stroke inch (mm)

3.15 x 2.64 (80 x 67) Battery Charger

12VDC Battery &

(Group 58; 435 Oil: 2.0 Qts

Fuel: 12 gal.

RATED OUTPUT @ 104° F (40° C) - WELDER

Welding Output Volts at Rated Amps Duty Cycle Max. OCV @ 3700 RPM

CC STICK DC Output 29 Volts @ 305 Amps 100%
CC STICK Output Range 20 to 305 Amps -------

PIPE DC Output 29 Volts @ 300 Amps 100%
PIPE Output Range 40 to 300 Amps -------

Touch Start™ TIG Output Range
Touch Start™ TIG Output Range
CV WIRE DC Output 29 Volts @ 300 Amps 100%
CV WIRE Output Range 14 to 29 volts -------

30 to 250 Amps 100% 60 Volts

20 to 250 Amps -------

RATED OUTPUT @ 104° F (40° C).- GENERATOR

Auxiliary Power

10,000 Watts Peak, 9500 Watts Continuous, 60 Hz

120/240 Volts

1

PHYSICAL DIMENSIONS

HEIGHT WIDTH DEPTH WEIGHT

30.00** in. 21.50 in 42.25 in.

762.0 mm 546.0 mm 1073.0 mm

510 lbs. (231kg.)

ENGINE COMPONENTS

LUBRICATION VALVE LIFTERS FUEL SYSTEM GOVERNOR

Full Pressure Hydraulic Mechanical Fuel Pump Mechanical Governor
with Full Flow Filter 5% Regulation

AIR CLEANER ENGINE IDLER MUFFLER ENGINE PROTECTION

Low noise Muffler: Top outlet Shutdown on low oil

Duel Element Automatic Idler can be rotated. Made from pressure.

long life, aluminized steel.

ENGINE WARRANTY: 2 year unlimited hours (See engine manufacturer warranty for details.)Kohler

1. Output rating in watts is equivalent to volt-amperes at unity power factor. Output voltage is within ± 10% at all loads up to
rated capacity. When welding, available auxiliary power will be reduced.

GX 300

A-2

INSTALLATION

MACHINE SPECIFICATIONS - GX300 (K2284-2)

RECEPTACLES AND CIRCUIT BREAKERS

RECEPTACLES AUXILIARY POWER CIRCUIT BREAKER OTHER CIRCUIT BREAKERS

A-2

(2) 120VAC Duplex GFCI Two 20AMP for Two Duplex GFCI Receptacle
(5-20R)(1) 120/240VAC Dual One 50AMP for Dual Voltage (2-Pole)

Voltage Full KVA (14-50R)

20AMP for Battery Charging Circuit

15AMP for 42V Wire Feeder Power

GX 300

A-3

SAFETY PRECAUTIONS

WARNING

INSTALLATION

LIFTING

The GX 300 weighs approximately 510 lbs. A lift bail
is mounted to the machine and should always be used
when lifting the machine.

A-3

Do not attempt to use this equipment until you
have thoroughly read the engine manufacturer’s
manual supplied with your welder. It includes
important safety precautions, detailed engine
starting, operating and maintenance instructions,
and parts lists.

------------------------------------------------------------------------

ELECTRIC SHOCK can kill.

• Do not touch electrically live parts or

electrode with skin or wet clothing.

• Insulate yourself from work and

ground

• Always wear dry insulating gloves.

-------------------------------------------------------

ENGINE EXHAUST can kill.

• Use in open, well ventilated areas or
vent exhaust outside.

------------------------------------------------------

MOVING PARTS can injure.

• Do not operate with doors open or
guards off.

• Stop engine before servicing.

• Keep away from moving parts.

------------------------------------------------------------------------

See additional warning information at

front of this operator’s manual.

Only qualified personnel should install,
use, or service this equipment.

LOCATION AND VENTILATION

The welder should be located to provide an unrestrict­ed flow of clean, cool air to the cooling air inlets and to
avoid restricting the cooling air outlets. Also, locate the
welder so that the engine exhaust fumes are properly
vented to an outside area.

STACKING

GX 300 machines cannot be stacked.

ANGLE OF OPERATION

Engines are designed to run in the level condition
which is where the optimum performance is achieved.
The maximum angle of continuous operation is 15
degrees in any direction. If the engine is to be operat­ed at an angle, provisions must be made for checking
and maintaining the oil level at the normal (FULL) oil
capacity in the crankcase.

When operating the welder at an angle, the effective
fuel capacity will be slightly less than the specified 12
gallons.

ADDITIONAL SAFETY PRECAUTIONS

WARNING

• Lift only with equipment of
adequate lifting capacity.

• Be sure machine is stable
when lifting.

• Do not lift this machine using
lift bale if it is equipped with a
heavy accessory such as trail­er or gas cylinder.

FALLING • Do not lift machine if lift bale is

EQUIPMENT can damaged.

cause injury. • Do not operate machine while

suspended from lift bale.

-----------------------------------------------------------------------­HIGH ALTITUDE OPERATION

At higher altitudes, output de-rating may be necessary. For
maximum rating, de-rate the welder output 3.5% for every 1000
ft. (305m). Contact an authorized engine service shop for modi­fications to operate above 5,000 ft. (1524m).

HIGH TEMPERATURE OPERATION

At temperatures above 40°C, Welder output derating is neces­sary. For maximum output ratings, derate the welder output 2
volts for every 10°C above 40°C.

TOWING

The recommended trailer for use with this equipment for road,
in-plant and yard towing by a vehicle(1) is Lincoln’s K957-1. If
the user adapts a non-Lincoln trailer, he must assume responsi­bility that the method of attachment and usage does not result
in a safety hazard nor damage the welding equipment. Some of
the factors to be considered are as follows:

1. Design capacity of trailer vs. weight of Lincoln equipment and
likely additional attachments.

2. Proper support of, and attachment to, the base of the weld-

ing equipment so there will be no undue stress to the frame­work.

3. Proper placement of the equipment on the trailer to insure

stability side to side and front to back when being moved
and when standing by itself while being operated or ser­viced.

4. Typical conditions of use, i.e., travel speed; roughness of sur­face on which the trailer will be operated; environmental con­ditions; like maintenance.

5. Conformance with federal, state and local laws.

(1)

Consult applicable federal, state and local laws regarding
specific requirements for use on public highways.

(1)

GX 300

A-4

INSTALLATION

A-4

VEHICLE MOUNTING

WARNING

Improperly mounted concentrated loads may
cause unstable vehicle handling and tires or other
components to fail.

• Only transport this Equipment on serviceable
vehicles which are rated and designed for such
loads.

• Distribute, balance and secure loads so vehicle
is stable under conditions of use.

• Do not exceed maximum rated loads for compo­nents such as suspension, axles and tires.

• Mount equipment base to metal bed or frame of
vehicle.

• Follow vehicle manufacture’s instructions.

------------------------------------------------------------------------

PRE-OPERATION ENGINE SERVICE

READ the engine operating and maintenance instruc­tions supplied with this machine.

WARNING

• Stop engine while fueling.

• Do not smoke when fueling.

• Keep sparks and flame away
from tank.

• Do not leave unattended while
fueling.

• Wipe up spilled fuel and allow

GASOLINE

can cause fire
or explosion.

fumes to clear before starting
engine.

• Do not overfill tank, fuel expan­sion may cause overflow.

GASOLINE FUEL ONLY

------------------------------------------------------------------------

OIL

The GX 300 is shipped with the engine crankcase
filled with high quality SAE 10W-30 oil. Check the oil
level before starting the engine. If it is not up to the full
mark on the dip stick, add oil as required. Check the
oil level every four hours of running time during the
first 25 running hours. Refer to the engine Operator’s
Manual for specific oil recommendations and break-in
information. The oil change interval is dependent on
the quality of the oil and the operating environment.
Refer to the Engine Operator’s Manual for the proper
service and maintenance intervals.

FUEL

USE GASOLINE FUEL ONLY

WARNING

• Fill the fuel tank with clean, fresh fuel. The
capacity of the fuel tank is 12 gallons (45.4
liters). When the fuel gauge reads empty the
tank contains approximately 2 gallons of reserve
fuel.

NOTE: The fuel tank is mounted below the engine

so a fuel shutoff valve is not required.

------------------------------------------------------------------------

ENGINE COOLING SYSTEM

WARNING

Air to cool the engine is drawn in lower set of louvers
on the case back. It is important that the intake air is
not restricted. Allow a minimum clearance of 2 feet
(0.6m) from the case back to a vertical surface.

BATTERY CONNECTION

CAUTION

Use caution as the electrolyte is a strong acid that
can burn skin and damage eyes.

------------------------------------------------------------------------

The GX 300 is shipped with the negative battery cable
disconnected. Make certain that the RUN-STOP
switch is in the STOP position. Remove the two
screws from the rear battery tray using a screwdriver
or a 3/8" socket. Attach the negative battery cable to
the negative battery terminal and tighten using a 1/2"
socket or wrench.

NOTE: This machine is furnished with a wet charged
battery; if unused for several months, the battery may
require a booster charge. Be careful to charge the bat­tery with the correct polarity.

MUFFLER OUTLET PIPE

Using the clamp provided secure the outlet pipe to the
outlet tube with the pipe positioned such that it will
direct the exhaust in the desired direction. Tighten
using a 9/16" socket or wrench.

SPARK ARRESTER

Some federal, state or local laws may require that
gasoline or diesel engines be equipped with exhaust
spark arresters when they are operated in certain
locations where unarrested sparks may present a fire
hazard. The standard muffler included with this welder
does not qualify as a spark arrester. When required by
local regulations, a suitable spark arrester, such as
the S24647 must be installed and properly main­tained.

GX 300

A-5

INSTALLATION

CAUTION

An incorrect spark arrestor may lead to damage to
the engine or adversely affect performance.

------------------------------------------------------------------------

HIGH FREQUENCY GENERATORS FOR
TIG APPLICATIONS

The K930-2 TIG Module is suitable for use with the
GX 300. The GX 300 and any high frequency generat­ing equipment must be properly grounded. See the
K930-2 Operating Manual for completed instructions
on installation, operation, and maintenance.

REMOTE CONTROL

The GX 300 is equipped with a 3 pin and a 14 pin
connector.

When in the CC-STICK, PIPE, and CV-WIRE modes
and when a remote control is connected to the auto­sensing circuit in the GX 300 automatically switches
the OUTPUT control from control at the welder to
remote control.

The 14 pin connector is used to directly connect a
wire feeder or TIG Module (K930-2) control cable. In
the CV-WIRE mode, the GX 300 auto-sensing circuit
automatically makes the GX 300 Output Control inac­tive and the wire feeder voltage control active when
the control cable is connected to the 14 pin connector.

NOTE: When a wire feeder with a built in welding volt­age control is connected to the 14 pin connector, do
not connect anything to the other connector.

A-5

When this welder is mounted on a truck or trailer, its
frame must be electrically bonded to the metal frame
of the vehicle. When this engine driven welder is con­nected to premises wiring such as that in a home or
shop, its frame must be connected to the system earth
ground. See further connection instructions in the sec­tion entitled "Standby Power Connections" as well as
the article on grounding in the latest U.S. National
Electrical Code and the local code.

In general, if the machine is to be grounded, it should
be connected with a #8 or larger copper wire to a solid
earth ground such as a metal water pipe going into
the ground for at least ten feet and having no insulat­ed joints, or to the metal framework of a building
which has been effectively grounded.
The U.S. National Electrical Code lists a number of
alternate means of grounding electrical equipment. A
machine grounding stud marked with the symbol
is provided on the front of the welder.

WELDING TERMINALS

The GX 300 is equipped with a toggle switch for
selecting "hot" welding terminal when in the "WELD
TERMINALS ON" position or "cold" welding terminal
when in the "REMOTELY CONTROLLED" position.

WELDING OUTPUT CABLES

With the engine off connect the electrode and work
cables to the output studs. The welding process dic­tates the polarity of the electrode cable. These con­nections should be checked periodically and tightened
with a 3/4" wrench.

ELECTRICAL CONNECTIONS

MACHINE GROUNDING

Because this portable engine driven welder creates its
own power, it is not necessary to connect its frame to
an earth ground, unless the machine is connected to
premises wiring (home, shop, etc.)

To prevent dangerous electric shock, other equipment
to which this engine driven welder supplies power
must:

WARNING

• Be grounded to the frame of the welder using a
grounded type plug.

• Be double insulated.

• Do not ground the machine to a pipe that carries
explosive or combustible material.

------------------------------------------------------------------------

Table A.1 lists recommended cable sizes and lengths
for rated current and duty cycle. Length refers to the
distance from the welder to the work and back to the
welder. Cable diameters are increased for long cable
lengths to reduce voltage drops.

TABLE A-1

TOTAL COMBINED LENGTH OF

ELECTRODE AND WORK CABLES

Cable Length

0-100Ft. (0-30 meters)

100-150 Ft. (30-46 meters)

150-200 Ft. (46-61 meters)

Cable Size for

305 Amps

100% Duty Cycle

1 / 0 AWG

2 / 0 AWG

3 / 0 AWG

GX 300

A-6

CABLE INSTALLATION

Install the welding cables to your GX 300 as follows.

INSTALLATION

A-6

STANDBY POWER CONNECTIONS

1. The gasoline engine must be OFF to install welding

cables.

2. Remove the flanged nuts from the output terminals.

3. Connect the electrode holder and work cables to

the weld output terminals. The terminals are identi­fied on the case front.

4. Tighten the flanged nuts securely.

5. Be certain that the metal piece you are welding (the

“work”) is properly connected to the work clamp and
cable.

6. Check and tighten the connections periodically.

CAUTION

• Loose connections will cause the output termi-

nals to overheat. The terminals may eventually
melt.

• Do not cross the welding cables at the output

terminal connection. Keep the cables isolated
and separate from one another.

------------------------------------------------------------------------

AUXILIARY POWER RECEPTACLES

The auxiliary power of the GX 300 consists of two 20
Amp-120 VAC (5-20R) duplex receptacles and one 50
Amp 120/240 VAC (14-50R) receptacle. The 240 VAC
receptacle can be split for single phase 120 VAC
operation.

The auxiliary power capacity is 10,000 watts Peak,
9500 Watts Continuous of 60 Hz, single phase power.
The auxiliary power capacity rating in watts is equiva­lent to volt-amperes at unity power factor. The max
permissible current of the 240 VAC output is 40 Amps.
The 240 VAC output can be split to provide two sepa­rate 120 VAC outputs with a max permissible current
of 40 Amps per output to two separate 120 VAC
branch circuits (these circuits cannot be paralleled).
Output voltage is within ± 10% at all loads up to rated
capacity. All auxiliary power is protected by circuit
breakers.

The GX 300 is suitable for temporary, standby or
emergency power using the engine manufacturer’s
recommended maintenance schedule.

The GX 300 can be permanently installed as a stand­by power unit for 240 VAC, 3 wire, single phase, 40
amp service. Connections must be made by a
licensed electrician who can determine how the
120/240 VAC power can be adapted to the particular
installation and comply with all applicable electrical
codes.

• Install the double-pole, double-throw switch
between the power company meter and the premis­es disconnect. Switch rating must be the same or
greater than the customer’s premises disconnect
and service over current protection.

• Take necessary steps to assure load is limited to
the capacity of the GX 300 by installing a 40 amp,
240 VAC double pole circuit breaker. Maximum
rated load for each leg of the 240 VAC auxiliary is
40 amperes. Loading above the rated output will
reduce output voltage below the allowable - 10% of
rated voltage which may damage appliances or
other motor-driven equipment and may result in
overheating of the GX 300 engine and/or alternator
windings.

• Install a 50 amp, 120/240 VAC plug (NEMA Type
14-50) to the double-pole circuit breaker using No.
6, 4 conductor cable of the desired length. (The 50
amp, 120/240 VAC plug is available in the optional
K802R plug kit or as part number T12153-9.)

• Plug this cable into the 50 Amp, 120/240 Volt recep­tacle on the GX 300 case front.

The 120 V auxiliary power receptacles should only be
used with three wire grounded type plugs or approved
double insulated tools with two wire plugs. The current
rating of any plug used with the system must be at
least equal to the current capacity of the associated
receptacle.

NOTE: The 240 V receptacle has two 120 V circuits,
but are of opposite polarities and cannot be paralleled.

GX 300