Lincoln Electric IM355-C LN-9 GMA User manual

IM355-C
June, 2010
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Lincoln arc welding equipment
is designed and built with safe-
ty in mind. However, your
overall safety can be increased
by proper installation. . . and
thoughtful operation on your
part. %T$%*$)*""
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importantly, think before you
act and be careful.
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For use with machines having Code Numbers: 1=42>E5
LN-9 GMA and LN-9F GMA Wire Feeder
• Sales and Service through Subsidiaries and Distributors Worldwide •
Cleveland, Ohio 44117-1199 U.S.A. TEL: [phone] FAX: [phone] WEB SITE: www.lincolnelectric.com
• World's Leader in Welding and Cutting Products •

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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 weld-
ing arc or when the engine is running. Stop
the engine and allow it to cool before refuel-
ing 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 posi-
tion 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.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.
9
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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.
 )+( ** "" $)*""*%$ %&(*%$ #$*$$ $ (&( &(%+() (
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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.
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.
1.h. To avoid scalding, do not remove the
radiator pressure cap when the engine is
hot.
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Diesel engine exhaust and some of its constituents
are known to the State of California to cause can-
cer, birth defects, and other reproductive harm.
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 Diesel Engines The Above For asoline Engines

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99 99
ARC RAYS c n 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.
ELECTRIC SHOCK c n 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.
ake certain the insulation is large enough to cover your full
area of physical contact with work and ground.
In ddition to the norm l s fety prec utions, if welding
must be performed under electric lly h z rdous
conditions (in d mp loc tions or while we ring wet
clothing; on met l structures such s floors, gr tings or
sc ffolds; when in cr mped positions such s sitting,
kneeling or lying, if there is high risk of un void ble or
ccident l cont ct with the workpiece or ground) use
the following equipment:
• Semi utom tic DC Const nt Volt ge (Wire) Welder.
• DC M nu l (Stick) Welder.
• AC Welder with Reduced Volt ge 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.
3.f.
aintain 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.
FUMES AND GASES
c n be d ngerous.
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 speci l
ventil tion such s st inless or h rd f cing (see
instructions on cont iner or MSDS) or on le d or
c dmium pl ted steel nd other met ls or co tings
which produce highly toxic fumes, keep exposure s
low s possible nd within pplic ble OSHA PEL nd
ACGIH TLV limits using loc l exh ust or mech nic l ven-
til tion. In confined sp ces or in some circumst nces,
outdoors, respir tor m y be required. Addition l pre-
c utions re lso required when welding on g lv nized
steel.
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 expo-
sure level should be checked upon installation and periodi-
cally thereafter to be certain it is within applicable OSHA PEL
and ACGIH TLV limits.
5.c. Do not weld in locations near chlorinated hydrocarbon vapors
coming from degreasing, cleaning or spraying operations.
The heat and rays of the arc can react with solvent vapors to
form phosgene, a highly toxic gas, and other irritating prod-
ucts.
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 ( SDS) and follow your
employer’s safety practices. SDS forms are available from
your welding distributor or from the manufacturer.
5.f. Also see item 1.b.

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999 999
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.
CYLINDER m y explode
if d m ged.
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.
WELDING nd CUTTING
SPARKS c n
c use 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.
Remember that welding sparks and hot
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 though they have
been “cleaned”. For information, purchase “Recommended
Safe Practices for the
Preparation for Welding and Cutting of
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.
6.f.
Sparks and spatter are thrown from the welding arc. Wear oil
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.
6.I. Read and follow NFPA 51B “ Standard for Fire Prevention
During Welding, Cutting and Other Hot Work”, available from
NFPA, 1 Batterymarch Park, PO box 9101, Quincy, a
022690-9101.
6.j. Do not use a welding power source for pipe thawing.
Refer to http://www.lincolnelectric.com/s fety for additional safety information.

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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 suiv-
antes:
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 tou-
jours 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 ten-
sion 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.
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
enroule 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 rayonnementde
l’arc.
c. Protéger l’autre personnel travaillant à proximité au
soudage à l’aide d’écrans appropriés et non-inflamma-
bles.
4. Des gouttes de laiter en fusion sont émises de l’arc de
soudage. Se protéger avec es vêtements de protection libres
de l’huile, tels que les gants en cuir, chemise épaisse, pan-
talons 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.
6. Eloigner les matériaux inflammables ou les recouvrir afin de
prévenir ttout risque d’incendie dû 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 la 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 atres 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 fumées toxiques.
10. Ne pas souder en présence de vapeurs de chlore provenant
d’opéerations 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 forte-
ment roxique) ou autres produits irritants.
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1. Relier à la terre le chassis du poste conformement au code
de l’électricité et aux recommendations du fabricant. Le dis-
positif de montage ou la piece à souder doit être branché à
une bonne mise à la terre.
2. Autant que possible, l’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. arder tous les couvercles et dispostifis de sûreté à leur
place.

EE
Thank You for selecting a QUALITY product by Lincoln Electric. We want you
to take pride in operating this Lincoln Electric Company product •••
as much pride as we have in bringing this product to you!
Re d this Oper tors M nu l 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:
WARNING
This statement appears where the information must be followed ex ctly to avoid serious person l injury or loss of life.
This statement appears where the information must be followed to avoid minor person l injury or d m ge to this equipment.
CAUTION
Ple se Ex mine C rton nd Equipment For D m ge Immedi tely
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 _________________________________________________________________________________
odel 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 Registr tion
- 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
WEB SITE t www.lincolnelectric.com. Choose “Quick Links” and then
“Product Registration”. Please complete the form and submit your registration.
CUSTOMER ASSISTANCE POLICY
The business of The Lincoln Electric Company is manufacturing and selling high quality welding equipment, consumables, and cutting equip-
ment. Our challenge is to meet the needs of our customers and to exceed their expectations. On occasion, purchasers may ask Lincoln Electric
for advice or information about their use of our products. We respond to our customers based on the best information in our possession at that
time. Lincoln Electric is not in a position to warrant or guarantee such advice, and assumes no liability, with respect to such information or
advice. We expressly disclaim any warranty of any kind, including any warranty of fitness for any customer’s particular purpose, with respect
to such information or advice. As a matter of practical consideration, we also cannot assume any responsibility for updating or correcting any
such information or advice once it has been given, nor does the provision of information or advice create, expand or alter any warranty with
respect to the sale of our products.
Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control
of, and remains the sole responsibility of the customer. any variables beyond the control of Lincoln Electric affect the results obtained in apply-
ing these types of fabrication methods and service requirements.
Subject to Change – This information is accurate to the best of our knowledge at the time of printing. Please refer to www.lincolnelectric.com
for any updated information.

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E9 E9
Page
)165CH.................................................................................................................................................i-iv
=BC1;;1C9>=.............................................................................................................................)53C9>=
Technical Specifications ..............................................................................................................A-1
Installing the LN-9 MA 2-Roll and 4-Roll Models ......................................................................A-2
Attaching the Wire Reel stand..............................................................................................A-2
Mounting the Unit .................................................................................................................A-2
Installing the LN-9F MA 2-Roll and 4-Roll Models ...................................................................A-2
Mounting the Wire Feed Unit................................................................................................A-2
Mounting the Control Box .....................................................................................................A-2
Connecting the Wire Feed Unit to the Control Box ..............................................................A-2
Routing the Electrode ...........................................................................................................A-3
Electrical Connections - LN-9 MA and LN-9F MA.................................................................A-3
Power Input Cable Assembly................................................................................................A-3
Connecting the Power Input Cable Assembly to the LN-9 MA Wire Feed Unit.................A-3
Connecting the Power Input Cable Assembly to the LN-9F MA Wire Feed Unit ..............A-4
Connecting the Power Input Cable Assembly to Power Sources ........................................A-4
Machine rounding...................................................................................................................A-12
Work Cable Connection ............................................................................................................A-12
Direct Work Cable Connection ...........................................................................................A-12
Connecting the un Cable to the Wire Feeder ........................................................................A-13
For MA un Cables .........................................................................................................A-13
Hooking Up MA Shielding as...............................................................................................A-14
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Operating Instructions .................................................................................................................B-1
Safety Precautions ......................................................................................................................B-1
eneral Description ....................................................................................................................B-2
Recommended Processes and Equipment.................................................................................B-2
K424 LN-9 MA 2-Roll and K568-1 LN-9 MA 4-Roll.........................................................B-2
K436 LN-9F MA 2-Roll and K583-1 LN-9F MA 4-Roll ....................................................B-2
DC Constant Voltage Power Sources ..................................................................................B-3
Controls and Settings..................................................................................................................B-4
Circuit Protection and Automatic Shutdown .........................................................................B-7
Avoiding rounding Lead Protector ( LP) Shutdown..........................................................B-7

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E99 E99
Drive Roll Installation ..................................................................................................................B-9
Changing Drive Rolls for 2-Roll Wire Feeders .....................................................................B-9
Changing Drive Rolls for 4-Roll Wire Feeders....................................................................B-11
Wire Loading .............................................................................................................................B-13
Loading a 22 to 30 lb. Reddi-Reel Package.......................................................................B-13
Loading a 10 to 30 lb. Spool ..............................................................................................B-14
Loading 50 and 60 lb. Coils................................................................................................B-15
Loading and Feeding 13-14 lbs. Innershield Coils .............................................................B-16
Idle Roll Pressure Setting .........................................................................................................B-17
2-Roll Wire Feeders............................................................................................................B-17
4-Roll Wire Feeders............................................................................................................B-17
Making a Test Weld and Adjusting Response and Starting ......................................................B-18
Adjust the Power Source ....................................................................................................B-18
Adjust the LN9 MA Controls ............................................................................................B-18
Voltage Control Response..................................................................................................B-19
Starting Characteristics.......................................................................................................B-19
Making a Weld....................................................................................................................B-20
Procedure at End of Coil .................................................................................................................B-20
Security of Weld Procedure Settings...............................................................................................B-20
335BB>A95B ..........................................................................................................................)53C9>=
Auxiliary Equipment Contacts .....................................................................................................C-1
Optional Equipment and Accessories .........................................................................................C-1
Power Input Cable Assemblies (K196, K595, K596)............................................................C-1
Wire Reel Stands and Mountings.........................................................................................C-1
un and Cable Assemblies ..................................................................................................C-3
Wire Feeder Accessories .....................................................................................................C-3
#19=C5=1=35..........................................................................................................................)53C9>=
Routine Maintenance ..................................................................................................................D-1
Drive Rolls and uide Tubes ...............................................................................................D-1
Wire Reel Mounting – 50 and 60 lb. Coils ...........................................................................D-1
Wire Reel Mounting Readi-Reels and Spools......................................................................D-1
Periodic Maintenance .................................................................................................................D-1
Control Box...........................................................................................................................D-1
Wire Drive Motor and ear Box ...........................................................................................D-1

*"%T%$*$*)(cont’d)
E999 E999
un and Cable Maintenance ......................................................................................................D-2
Proper Speed Sensor Motor Mounting.................................................................................D-2
un Cable Connector Requirements ...................................................................................D-3
*A>D2;5B8>>C9=7....................................................................................................................)53C9>=
How to Use Troubleshooting uide ............................................................................................E-1
Troubleshooting uide ................................................................................................................E-2
917A1<B................................................................................................................................)53C9>=
LN-9 MA Wiring Diagram..........................................................................................................F-1
LN-9F MA Wiring Diagram .......................................................................................................F-2
LN-9 MA Dimension Print .........................................................................................................F-3
LN-9F MA Dimension Prints .....................................................................................................F-4
&1ACB.................................................................................................&&&&)5A95B

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Supplied by power source: 115 VAC, 50/60 Hz., 350 VA
-()&
80 to 980 inches per minute (2.03 to 24.9 meters per minute)
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12.0 TO 60.0 VDC
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OPERATION: - 20oC to +40oC (- 4oF to +104oF) Recommended
- 40oC to +40oC (- 40oF to +104oF) Maximum Rated
STORA E: - 40oC to +85oC (- 40oF to +185oF)
-(#*()
0.023 through 1/16 Solid Electrode
0.045 through 5/64 Cored Electrode
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LN-9 MA (2 ROLL) 12.15 in. 11.56 in. 12.19 in. 29.3 lbs
(308.4 mm) (293.4 mm) (309.4 mm) (13.3 kg)
LN-9 MA (4 ROLL) 12.15 in. 11.56 in. 12.19 in. 27.5 lbs
(308.4 mm) (293.4 mm) (309.4 mm) (12.4 kg)
LN-9F MA Control Box 10.4 in. 6.17 in. 11.26 in. 16.3 lbs
(264 mm) (156.6 mm) (293.4 mm) (7.4 kg)
LN-9F MA Wire Drive (2 ROLL) 8.06 in. 7.5 in. 12.78 in. 15.6 lbs
(204.6 mm) (190.4 mm) (324.4 mm) (7.1 kg)
LN-9F MA Wire Drive (4 ROLL) 8.06 in. 7.5 in. 12.78 in. 20.5 lbs
(204.6 mm) (190.4 mm) (324.4 mm) (9.2 kg)
+*//" The amount of welding performed in a 10 minute period, expressed as a percentage.

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Both the 2-Roll and 4-Roll LN-9 MA are shipped with-
out the wire reel stand attached. The screws and wash-
ers for mounting the wire reel stand are included with
the LN-9 MA (fastened in their respective mounting
holes). To attach the stand:
1. Remove the three 3/8" hex screws from the back of
the wire feed unit.
2. Place the wire reel stand mounting bracket in posi-
tion against the back of the wire feed unit.
3. Replace and tighten the screws. The long screw
and plain washer go into the top hole. For 4-Roll
feeders, one plain washer is used for mounting 60#
wire stands and 2 plain washers for mounting 30#
stands.
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LN-9 MA wire feeders can be mounted directly on top
of their power source as long as it is secure and level.
When portability is required, the LN-9 MA can be
mounted on a K163 undercarriage See the
Accessories section for details.
A K178-1 swivel platform is available for mounting the
LN-9 MA to the power source. See the Accessories
section for details.
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Mount the wire feed unit by means of the insulated
mounting bracket attached to the bottom of the gear-
box. Refer to the LN-9F MA Dimension Print in the
Diagrams section of this manual for the size and loca-
tion of the mounting holes. The gearbox assembly is
electrically "hot" when the gun trigger is pressed.
Therefore, make certain the gearbox does not come in
contact with the structure on which the unit is mounted.
The wire feed unit should be mounted so that the drive
rolls are in a vertical plane so dirt will not collect in the
drive roll area. Position the mechanism so it will point
down at about a 45oangle so the wire feed gun cable
will not be bent sharply as it comes from the unit.
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The same control box is used for both the 2-Roll and 4-
Roll wire feed unit. It contains two keyhole slots and
one slot for mounting. Refer to the LN-9F MA
Dimension Print in the Diagrams section of this manu-
al for the size and location of these slots. Mount the
box at some convenient location close to the wire feed
unit. This will enable the 16-foot control cable assem-
bly supplied with both the LN-9F MA 2-Roll and 4-Roll
to reach between the control box and the wire feed
unit.
1. Drill the required holes in the mounting surface.
Partially install 1/4-20 screws.
2. Open the control box door by removing the two door
screws.
3. Mount the box.
4. Tighten the screws.
5. Close the control box door and replace the door
screws.
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Both the LN-9F MA 2-Roll and 4-Roll include the
same 16 ft. control and electrode cable assembly.
Connect the wire feed unit to the control box as follows:
1. Make certain the cables are protected from any
sharp corners that may damage their jackets.
Mount the cable assembly along the boom so the
end with the female amphenol connector pins is at
the wire feed unit.
2. Connect the cable connector to the receptacle on
the back of the wire feed unit connection box.
3. At the same end, connect the electrode lead to the
connection stud of the copper strap along the side
of the wire feed unit.
4. At the control box end, connect the amphenol con-
nector of the control cable to the mating MS-type
receptacle on the bottom of the control box. (See
Figure A.3, later in this section, for the location of
this connection.)
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The electrode supply may be either from reels, Readi-
Reels, spools, or bulk packaged drums or reels.
Observe the following precautions:
• The electrode must be routed to the wire feed unit so
that the bends in the wire are at a minimum. The
force required to pull the wire from the reel into the
wire feed unit must be kept at a minimum.
• The electrode is "hot" when the gun trigger is
pressed and must be insulated from the boom and
structure.
• If more than one wire feed unit share the same
boom, their wire and reels must be insulated from
each other and insulated from their mounting struc-
ture.
See the Accessories section for information about
mounting a K299 wire reel assembly.
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A special cable assembly is required to connect all LN-
9 MA models to the power source. The assembly
includes control cable and electrode cable. Various
sizes are available, based on length and maximum
welding current. The following power source cable
assemblies are available:
K196 for Terminal Strip control connection and output
terminal.
K595 for 14-Pin receptacle and output terminal.
K596 for 14-Pin receptacle and Twist-Mate" connec-
tion.
NOTE: Use of an LN-9 MA with a Pulse Power 500,
Invertec V300 or a DC650 PRO requires a K442-1
Pulse Power Filter Kit.
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The K196, K595, or K596 cable assembly consists of
an electrode cable and multiconductor control cable.
The control cable has a polarized plug on the wire
feeder end. To install:
1. See Figure A.1. Connect the polarized plug of the
control cable to the mating connector on the back
of the wire feeder.
2. See Figure A.2. Remove the screws holding the
cable strain relief clamp located near the rear of
the wire reel stand base. Put the control cable and
the electrode cable under the clamp and install the
screws.
For cables with more than one electrode cable,
leave the junction between the two or more cables
and the single 4/0 stub behind the clamp so that
only the single electrode lead is under the clamp.
3. See Figure A.1. Pass the single electrode cable
through the hole provided in the back corner of the
wire section and fasten it to the conductor block of
the copper strap along the side of the wire drive
unit.
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1. See Figure A.3. Connect the polarized plug of the
K196, K595, or K596 control cable to the mating
MS-type connector on the bottom of the LN-9F
MA control box.
2. Bolt the electrode lead from the power source to the
electrode lead to the wire feed unit using the nut
and bolt supplied. Insulate the connection with elec-
trical tape.
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Turn input supply power to the power source OFF
before connecting the LN-9 MA or LN-9F MA wire
feeder.
Connect to an appropriate Lincoln power source as fol-
lows:
1. If using a multipurpose source (such as the DC-
250, DC-400 and DC-600), be sure it is properly
set for the welding process being used. See the
topic "Making a Test Weld," in the Operation sec-
tion of this manual.
For terminal strip connections using the K196 power
input cable, connect the input cable to the power
source exactly as specified on the appropriate LN-9
MA model connection diagram:
Figure A.4 for DC-250, DC-400 and CV-400, CV-500 l
Figure A.5 for DC-600
Figure A.6 for DC-1000
Figure A.7 for Pulse Power 500
Figure A.8 for R3S-400, R3S-600, R3S-800
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Figure A.9 is a connection diagram for connecting the
LN-9 MA to V300 power sources. The connection is
made with a K596 cable assembly, which has an
amphenol connection rather than a terminal strip con-
nection at the power source.
Depending on the power source and process you are
using, the jumpers on the LN-9 MA voltage board
may have to be changed. As shipped, the LN-9 MA is
connected for use with the DC-250 DC-400, CV-400,
CV-500-I and DC-600. For other power sources, refer
to the appropriate connection diagram.
NOTE: If you are using the Pulse Power 500, DC650
Pro, or V300 power source, the K442-1 Pulse Power
Filter Kit must be installed in the LN-9 MA. See the
instructions included with the kit. If you are using the
Invertec V300, the K608-1 Adapter must also be
installed according to the connection diagram and
instructions provided in the Invertec Manual.
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FIGURE A.4 – CONNECTION OF LN-9 GMA TO DC-250, DC-400, and CV/CVI PO ER SOURCES
Above diagram shows electrode connected positive. To change polarity, turn power off, reverse the electrode and work leads at the
power source and position the switch on power source to proper polarity.
* Does not apply to DC-400 below code 9200 with polarity switch.
N.A. Welding cables must be of proper capacity for the current and duty cycle of immediate and future applications.
N.B. Extend lead #21 using #14 AW or larger insulated wire physically suitable for the installation. An S16586-[ ] remote voltage
sensing work lead is available for this purpose. Connect it directly to the work piece keeping it electrically separate from the weld-
ing work lead circuit and connection. For convenience, this extended #21 lead should be taped to the welding work lead. (If the
length of work lead circuit is short, and connections can be expected to be reliable, then control cable lead #21 does not need to
be extended and can be directly connected to terminal #21 on the terminal strip. Note that this is not the preferred connection
because it adds error to the wire feeder voltmeter reading.)
N.C. Tape up bolted connection if lead #21 is extended.
N.D. Connect the control cable ground lead to the frame terminal marked near the power source terminal strip. The power source
grounding terminal (marked and located near the power source input power connections) must be properly connected to elec-
trical ground per the power source operating manual.
N.F. The LN-9 MA voltage control jumpers must be connected as follows:
White jumper on voltage board to pin “S”.
Blue jumper on voltage board (later units only), or on start board (earlier units), to pin “B”.
*N. . If lead #21 is to be connected to the terminal strip, connect to the #21 terminal that matches work polarity. This connection must
be changed whenever the electrode polarity is changed.
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FIGURE A.5 – CONNECTION OF LN-9 GMA TO DC-600 PO ER SOURCES
Above diagram shows electrode connected positive. To change polarity, turn power off, reverse the electrode and work leads at the
power source and position the switch on power source to proper polarity.
For optimum performance with the LN-9 MA, DC-600’s with codes 8288 and above are preferred.
N.B. Welding cables must be of proper capacity for the current and duty cycle of immediate and future applications.
N.C. Extend lead #21 using #14 or larger insulated wire physically suitable for the installation. An S16586-[ ] remote voltage sensing
work lead is available for this purpose. Connect it directly to the work piece keeping it electrically separate from the welding work
lead circuit and connection. For convenience, this extended #21 lead should be taped to the welding work lead. (This extended
#21 lead connection replaces the need to employ the remote work lead accessory on LN-9’s which have a direct work lead jack.)
N.D. Tape up bolted connection.
N.E. Connect the LN-9 MA control cable ground lead to the frame terminal marked near the power source terminal strip. The
power source must be properly grounded.
N. . The LN-9 MA voltage control jumpers must be connected as follows:
White jumper on voltage board to pin “S”.
Blue jumper on voltage board (Later units only) or on start board (Earlier units) to pin “B”.
N.H. For DC-600 Codes below 8200 connect a jumper from “N” to “P” on LN-9 MA only. There is no NPS terminal strip on codes
above 8200.
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FIGURE A.6 – CONNECTION OF LN-9 GMA TO DC-1000 PO ER SOURCES
Above diagram shows electrode connected positive. To change polarity, turn power off, reverse the electrode and work leads at the
power source, position the positive - negative switch on power source to correspond to the polarity of the electrode cable connection.
N.A. Welding cables must be proper capacity for the current and duty cycle of immediate and future applications.
N.B. Extend lead #21 using #14 or larger insulated wire physically suitable for the installation. an S16586 remote voltage sensing work
lead is available for this purpose. Connect it directly to the work piece keeping it separate from the welding work cable connection
to work piece. For convenience, this extended #21 lead should be taped along the welding work cable. (This extended #21 lead
connection replaces the need to employ the remote work lead accessory on any LN-9 MA which has a direct work lead jack).
N.C. Tape up bolted connection.
N.D. Connect the LN-9 MA control cable ground lead to the frame terminal marked near the power source terminal strip. The
power source must be properly grounded.
N.E. If using an older automatic control cable with leads #75, #76, #77; connect lead #75 to #75 on terminal strip, connect lead #76 to
#74 on terminal strip, connect lead #77 to #73 on terminal strip.
N.F. The LN-9 MA voltage control jumpers must be connected as follows:
White jumper on voltage board to pin “S”.
Blue jumper on voltage board (Later units only) or on start board (earlier units) to pin “B”.
N. . Set the DC-1000 controls as follows:
Set the control switch to “output control remote”. For submerged arc processes, set the mode switch to “C.V. submerged arc”.
For open arc processes, set the mode switch to “C.V. Innershield”.
N.H. Alternative 500 amp positive terminal connection provided on DC-1000 models above code 9500 only.
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FIGURE A.7 – CONNECTION OF LN-9 GMA TO PULSE PO ER 500 PO ER SOURCES
Above diagram shows electrode connected positive. To change polarity, turn power off, reverse the electrode and work leads at the
power source and properly set the feeder polarity switch.
N.A. Welding cables must be of proper capacity for the current and duty cycle of immediate and future applications.
N.B. Extend lead #21 using 14 AW or larger insulated wire physically suitable for the installation. An S16586-[ ] remote voltage sens-
ing work lead is available for this purpose. Connect it directly to the work piece keeping it electrically separate from the welding
work lead circuit and connection. For convenience, this extended #21 lead should be taped to the welding work lead.
N.C. Tape up bolted connection.
N.D. Connect the control cable ground lead to the frame terminal marked near the power source terminal strip. The power source
grounding terminal (marked and located near the power source input power connections) must be properly connected to elec-
trical ground per the power source Operating Manual.
N.E. Connect control leads t terminal strip as follows:
LN-9: A to 75 B to 77 C to 78
N.F. The LN-9 MA voltage control jumpers must be connected as follows:
White jumper on voltage board to pin “S”.
Blue jumper on voltage board is not connected to any pin. (Secure loose jumper clear of any possible interference.)
NOTE: For proper pulse welding operating with LN-9:
1. The LN-9 MA must have an L6084-3 (or higher superseding part number) voltage board installed. (Standard above code
9100.)
2. The Pulse Power Filter board must be installed and connected in the LN-9 per instructions provided with the kit.
3. The pulse current sensor assembly (with looped copper energizer) must be installed. (Standard above code 9100.) Feeder
conversion kits are available for all LN-9 MA model codes (below 9100 and above 9100).
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FIGURE A.8 – CONNECTION OF LN-9 GMA TO IDEALARC R3S-400, R3S-600, R3S-800 PO ER SOURCES
Above diagram shows electrode connected positive. To change polarity, turn power off, reverse the electrode and work leads at the
power source and reverse the “control switch” at the power source, and the “polarity switch” on the LN-9 MA.
Connect the control cable ground lead to the frame terminal marked near the power source terminal strip or to an unpainted frame
screw. The power source must be grounded properly.
N.A. On earlier R3S-400, -600 & 800 machines, #67 & #1 terminals were also on the terminal strip.
N.B. Welding cables must be of proper capacity for the current and duty cycle of immediate and future applications.
N.C. Extend lead #21 using 14 AW or larger insulated wire physically suitable for the installation. An S16586-[ ] remote voltage sens-
ing work lead is available for this purpose. Connect it directly to the work piece keeping it electrically separate from the welding
work lead circuit and connection. For convenience, this extended #21 lead should be taped to the welding work lead. (This
extended #21 lead connection replaces the need to employ the remote work lead accessory on LN-9’s which have a direct work
lead jack.)
N.E. Upper terminal strip (#75, #76 & #77) may not appear on older R3S machines, and therefore is not compatible for use since there
will be no adjustment of voltage by the LN-9 MA.
N.F. The LN-9 MA voltage control jumpers must be connected as follows:
White jumper on voltage board;
To pin “F” for open arc process or
To pin “S” for submerged arc process.
Blue jumper on voltage board (later units only), or on start board (earlier units), to pin “A”.
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FIGURE A.9 – CONNECTION OF LN-9 GMA TO V300 PO ER SOURCES
N.A. Welding cable must be sized for current and duty cycle of application.
N.B. Diagram shows electrode positive. To change polarity, turn power “OFF”, reverse electrode and work cable at power source. Set
meter polarity switch on rear of invertec to coincide with polarity used. Set LN-9 MA polarity switch also.
N.C. Install K608-1 adapter in line with P10 to LN-9 MA voltage board and secure to adjacent harness with wire tie provided. Turn
“start” trimmer on voltage board per instructions in V300 manual.
N.D. For MAW welding, install Pulse Power Filter Kit K442-1 in LN-9 MA.
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