Lincoln Electric Welding System IM723 A User Manual

RETURN TO MAIN MENU  
IM723-A  
January, 2004  
UNDER-COOLER CART  
For use with machines having Code Numbers:  
10808, 11068  
Safety Depends on You  
Lincoln arc welding and cutting  
equipment is designed and built  
with safety in mind. However, your  
overall safety can be increased by  
proper installation ... and thought-  
ful 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.  
R
IP 21S  
NTRL/C  
OPERATOR’S MANUAL  
Copyright © 2004 Lincoln Global Inc.  
• World's Leader in Welding and Cutting Products •  
• Sales and Service through Subsidiaries and Distributors Worldwide •  
Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com  
 
ii  
ii  
SAFETY  
ARC RAYS can burn.  
ELECTRIC SHOCK can  
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.  
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.  
4.b. Use suitable clothing made from durable flame-resistant  
material to protect your skin and that of your helpers from  
the arc rays.  
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.  
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.  
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:  
FUMES AND GASES  
can be dangerous.  
5.a. Welding may produce fumes and gases  
hazardous to health. Avoid breathing these  
• Semiautomatic DC Constant Voltage (Wire) Welder.  
• DC Manual (Stick) Welder.  
fumes and gases.When welding, keep  
your head out of the fume. Use enough  
• AC Welder with Reduced Voltage Control.  
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.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.  
5.b. 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.  
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.  
5.c. 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.  
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.  
5.d. 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.  
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.e. Also see item 1.b.  
Mar ‘95  
 
iii  
iii  
SAFETY  
WELDING SPARKS can  
cause fire or explosion.  
CYLINDER may explode  
if damaged.  
6.a. Remove fire hazards from the welding area.  
If this is not possible, cover them to prevent  
7.a. Use only compressed gas cylinders  
containing the correct shielding gas for the  
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.  
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.  
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.  
7.c. Cylinders should be located:  
Away from areas where they may be struck or subjected to  
physical damage.  
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.  
•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.  
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).  
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.  
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.  
FOR ELECTRICALLY  
powered equipment.  
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 cir-  
cuits. This can create fire hazards or overheat lifting chains  
or cables until they fail.  
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.  
6.h. Also see item 1.c.  
8.c. Ground the equipment in accordance with the U.S. National  
Electrical Code and the manufacturer’s recommendations.  
Mar ‘95  
 
iv  
iv  
SAFETY  
zones où l’on pique le laitier.  
PRÉCAUTIONS DE SÛRETÉ  
6. Eloigner les matériaux inflammables ou les recouvrir afin de  
prévenir tout risque d’incendie dû aux étincelles.  
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:  
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.  
Sûreté Pour Soudage A L’Arc  
1. Protegez-vous contre la secousse électrique:  
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 lev-  
age, 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.  
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.  
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.  
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.  
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.  
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.  
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.  
PRÉCAUTIONS DE SÛRETÉ POUR  
LES MACHINES À SOUDER À  
TRANSFORMATEUR ET À  
REDRESSEUR  
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 ray-  
onnement 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.  
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.  
c. Protéger l’autre personnel travaillant à proximité au  
soudage à l’aide d’écrans appropriés et non-inflammables.  
3. Avant de faires des travaux à l’interieur de poste, la debranch-  
er à l’interrupteur à la boite de fusibles.  
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, pan-  
talons sans revers, et chaussures montantes.  
4. Garder tous les couvercles et dispositifs de sûreté à leur  
place.  
5. Toujours porter des lunettes de sécurité dans la zone de  
soudage. Utiliser des lunettes avec écrans lateraux dans les  
Mar. ‘93  
 
v
v
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!  
Thank 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 WEB SITE at www.lincolnelectric.com. Choose “Quick Links” and then  
“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:  
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  
Safety Precautions. ..............................................................................................................A-2  
Unpacking .....................................................................................................................A-2  
Filling Coolant Reservoir...............................................................................................A-2  
Coolant Connections.....................................................................................................A-3  
Input Power Connection................................................................................................A-4  
Assembly of Precision Tig....................................................................................................A-4  
Fastener Quick Reference ............................................................................................A-5  
Connection of Tig Torches............................................................................................A-5  
________________________________________________________________________________  
Operation.........................................................................................................................Section B  
Safety Precautions. ..............................................................................................................B-1  
General Description ......................................................................................................B-1  
Recommended Processes............................................................................................B-1  
Recommended Equipment............................................................................................B-1  
Turning the System On .................................................................................................B-2  
Cooling Efficiency..........................................................................................................B-2  
________________________________________________________________________________  
Maintenance ....................................................................................................Section D  
Safety Precautions ................................................................................................D-1  
Routine ...........................................................................................................D-1  
Periodic...........................................................................................................D-1  
Pump...............................................................................................................D-1  
Pump Motor ....................................................................................................D-1  
Heat Exchanger ..............................................................................................D-1  
Reservoir Coolant Level..................................................................................D-2  
Coolant Treatment Recommendation ......................................................D-2,D-3  
Pump Inlet Filter..............................................................................................D-3  
Procedure .......................................................................................................D-3  
Additional Service Notes.................................................................................D-4  
________________________________________________________________________  
Troubleshooting..............................................................................................Section E  
Safety Precautions.................................................................................................E-1  
How to Use Troubleshooting Guide.......................................................................E-1  
Troubleshooting Guide ..........................................................................................E-2  
________________________________________________________________________  
Diagrams ..........................................................................................................Section F  
Wiring Diagram ......................................................................................................F-1  
Flow Diagram.........................................................................................................F-2  
Dimension Print......................................................................................................F-3  
________________________________________________________________________  
Parts List..................................................................................................................P402  
________________________________________________________________________  
 
A-1  
A-1  
INSTALLATION  
TECHNICAL SPECIFICATIONS – UNDER- WATER COOLER  
Model / Make  
Under-Cooler Cart K1828-1  
Input  
100-120 VAC 50/60 Hz 1 Phase  
Rated Current Draw  
Operating Pressure  
Pump Hydraulic  
60 Hz (2.8-3.5 Amps)  
50 Hz (3.5-5.3 Amps)  
60 psig (413 kPa) (4.1 bar)  
Rating  
No Flow  
Discharge Pressure (gage)  
(Relief Valve Setting)  
60 PSIG (414 kPa) (4.14 bar) Max.  
No Pressure  
Pump Hydraulic Rating  
Flow Rate  
1.66 gal/min (6.28 liter/min) Max.  
(Typical Operation)  
Discharge Pressure (gage)  
Flow Rate  
53-57 PSIG (365-393 kPa)  
.45-.60 gal/min (1.7-2.3 liter/min)  
Reservoir Capacity  
2.0 Gallons (7.6 Liters)  
For Use Above Freezing: Clean tap, distilled, or de-ionized water  
For Use Below Freezing: 50% water and 50% pure ethylene glycol mixture.  
Recommended Coolant  
DO NOT USE: Automotive anti-freeze that contains rust inhibitors or leak  
stoppers. These coolants will damage the pump and block the small internal  
passageways of the heat exchanger, affecting cooling performance. To  
acquire the proper coolant contact a local welding distributor.  
DO NOT USE: Pre-packaged welding industry coolants. These coolants may  
contain oil-based substances, which attack the plastic components of the  
cooler. Once added to the cooler, these substances are virtually impossible to  
purge from the water lines and heat exchanger.  
Weight  
Shipping  
Reservoir Full (Water)  
252 lbs. (114 kg)  
267 lbs. (121 kg)  
Dimensions  
Length  
41 in (1041 mm)  
27 in (686 mm)  
21 in ( 533mm )  
19 in (483 mm)  
Width  
Height (Top Face)  
Height (TIG Interface)  
UNDER-COOLER CART  
 
A-2  
A-2  
INSTALLATION  
Save the instruction manual and service directory sup-  
plied with the Under-Cooler cart for parts orders and  
future maintenance service.  
SAFETY PRECAUTIONS:  
WARNING  
FILLING COOLANT RESERVOIR  
ELECTRIC SHOCK Can Kill  
• Only qualified persons should per-  
form this installation.  
(See Section A-1 for recommended coolant.)  
To avoid freeze damage and water leakage in ship-  
ment, the Under-Cooler cart is delivered empty with  
no coolant in the system. To fill the unit, locate the  
plastic reservoir fill cap at the front middle of the cool-  
er drawer.  
HOT COOLANT CAN BURN SKIN  
• Always be sure coolant is not hot  
before doing any work on cooler  
parts.  
ROTATING FAN BLADES ARE  
Clean tap water, distilled water, de-ionized water, a  
50/50 mix of pure ethylene glycol and water can be  
added into the coolant reservoir. The reservoir fill hole  
mates with most coolant containers but, to avoid  
spillage of coolant, a funnel should be placed into the  
reservoir hole when filling.  
HAZARDOUS  
• Do not put your hands near an oper-  
ating fan.  
• Keep all equipment safety guards, covers and  
devices in position and in good repair. Keep  
hands, hair, clothing and tools away from fans  
and all other moving parts when starting, oper-  
ating or repairing equipment.  
• 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 great-  
est care when working near moving parts.  
------------------------------------------------------------------------  
NOTE: Pure solutions and mixtures of, or materials  
(i.e. towels) wetted with ethylene glycol are toxic to  
humans and animals. They must not be haphazardly  
discarded, especially by pouring liquids down the  
drain. Contact the local EPA office for responsible dis-  
posal methods or for recycling information.  
For best results when using the Under-Cooler cart  
with Lincoln torches, use distilled or de-ionized water,  
although if not available, tap water can be used. If pro-  
tection from freezing is desired, use a 50% water and  
50% pure ethylene glycol mixture and should be  
ordered from a local welding distributor.  
UNPACKING  
The packaging of the Under-Cooler cart is designed to  
withstand shipping abuse, and contains a cardboard  
liner that surrounds the unit. If any shipping damage  
has occurred, contact your certified Lincoln distributor  
or service center. When unpacking the unit, avoid  
thrusting sharp objects through the carton liner, which  
may damage the heat exchanger or scratch the case.  
Below is the recommended procedure for unpacking  
the Cooler:  
WARNING  
When using the Under-Cooler cart, DO NOT USE  
OIL BASED COOLANTS OR COOLANTS THAT  
CONTAIN RUST INHIBITORS OR LEAK STOP-  
PERS.  
When adding coolant to the Under-Cooler cart,  
UNPLUG THE COOLER BEFORE FILLING THE  
COOLANT RESERVOIR:  
-----------------------------------------------------------------------  
ADDING COOLANT:  
Carefully add 2 gallons (7.6 liters) of coolant through a  
funnel into the coolant reservoir fill hole. AVOID  
SPILLING COOLANT INTO THE DRAWER OR  
ONTO THE PUMP MOTOR.  
• Cut banding securing carton and remove carton.  
• Remove banding that holds the cart to the skid.  
• Remove screws securing rear bottle tray to skid.  
• Dislodge front, notched 2 X 4 that secures front cast-  
ers and remove.  
• Roll Under-Cooler Cart forward off of skid  
• Cut banding securing drawers and remove and  
unwrap handle, upper cylinder support assembly,  
hoses and hardware package located in the storage  
drawer of the unit.  
UNDER-COOLER CART  
 
A-3  
A-3  
INSTALLATION  
If you have hose to make replacement hose assem-  
blies but need to order the fittings and hardware, see  
below for the correct part numbers to mate with the  
Under-Cooler cart and the Precision TIG Machine.  
Then follow the given instructions.  
CAUTION  
NOTE: DO NOT ADD MORE THAN 2 GALLONS  
(7.6 LITERS) OF COOLANT INTO THE RESER-  
VOIR. The fill cap contains a pressure release air  
hole, which must not be blocked by overfilling the  
reservoir with coolant.  
(2) T15007-2 Connector Nuts  
(2) T15008 Nipples for 3/16" I.D. hose  
(2) S10888-35 Hose Clamps  
------------------------------------------------------------------------  
Remove the connector nut from the INLET hose by  
making a straight cut 1/4"-1/2" (6-12mm) away from  
the end of the nipple located inside of the hose. Take  
the nipple and the connector nut ordered above and  
insert the nipple into the connector nut so that the  
threaded end of the connector nut points away from  
the barbed end of the nipple. Twist the barbed end of  
the nipple into the hose until the shoulder of the nipple  
is flush with the end of the hose. Secure the hose onto  
the nipple with the hose clamp to insure that the con-  
nection is watertight. No water can leak from the con-  
nection if it is properly attached. Repeat the procedure  
for the OUTLET hose. When complete, follow the con-  
nection procedure detailed above for connecting the  
hoses to the cooler drawer fittings.  
Be certain to replace the reservoir fill cap when the  
reservoir is full. Simply press on the inside center of  
the fill cap until the cap snaps into place. Operation of  
the cooler without the fill cap in place can cause poor  
cooling efficiency, evaporation loss of coolant and  
reduced product life.  
COOLANT CONNECTIONS  
The fittings located on the back center of the cooler  
drawer are two female 5/8-18 left-hand threaded fit-  
tings (CGA Style). The hoses provided with this unit  
are color coded with red (hot) and blue (cold) tape that  
should be matched up with the decals, also color  
coded, on both the cooler and the TIG machine.  
Recommended torque value for the 5/8-18 LH fittings  
is 12 – 15 ft lbs. If a torque wrench is not available,  
snug the fittings and check for leaks.  
*The connector and nipple listed fit tightly onto 5/32"  
(4.0mm) to 3/16" (4.8mm) inner diameter hose, but if  
clamped tightly to the hose, can fit up to a .25  
(6.4mm) inner diameter hose.  
Refer to Figure A-1 for decal located adjacent to water  
connections.  
NOTE: Hoses have been provided with this product  
and any replacement hoses, purchased or made,  
should not deviate from their length. To replace the-  
ses hoses from Lincoln Electric ORDER (1) S18453-  
19 (HOT) AND (1) S18453-20 (COLD). Hoses too  
long may be pinched when replacing the gas bottles  
and hoses too short may be damaged opening the  
cooler drawer.  
FIGURE A-1  
COOLANT  
IN  
COOLANT  
OUT  
S25134  
CAUTION  
Be certain that no leaks exist when the cooler is  
turned on. A leak will deplete reservoir volume,  
causing poor cooling, performance and reducing  
torch life.  
Note: Be certain that only 5/8-18 left handed male  
nuts with clean and smooth threads are used on  
your water hoses. Poor connections cause  
coolant to leak at the fittings and will deplete the  
coolant in the reservoir.  
------------------------------------------------------------------------  
UNDER-COOLER CART  
 
A-4  
A-4  
INSTALLATION  
Assembly of the Under-Cooler cart to the Precision  
TIG machine is actually quite simple. Read carefully  
the prior warnings and precautions to assembling to a  
Precision TIG machine.  
INPUT POWER CONNECTION  
Plug the input power cord on the Under-Cooler cart  
into the standard bottom 115V NEMA circuit breaker  
protected receptacle, located on the back of the  
Precision TIG machine. Using this receptacle is taking  
advantage of the "cooler as needed" circuit incorporat-  
ed into the TIG machine and will prolong the life of the  
cooler. The lower, or bottom receptacle is clearly  
marked for this application.  
Assembly:  
1. Lift the Precision TIG machine approximately 24"  
(610mm) off the floor using the lift bale. Lower onto  
the Under-Cooler cart aligning holes in the TIG base  
with the two pins on each side of the Under-Cooler  
cart roof.  
2. Fasten the case sides of the Under-Cooler cart to  
the TIG machine base using items 4 through 7 in  
the 4 locations shown. Washer, lock washer and  
nut, (in that order) are to be inside machine base  
flange with the head of the bolt on the outside of the  
Under-Cooler cart case side.  
If you wish to use the top 115 V NEMA receptacle  
located on the back of the machine for cooler opera-  
tion, the cooler will run 100% of the time that the  
Precision TIG machine is powered "ON".  
3. Remove (4) 5/16-18 X .625 long screws from the  
front of the machine and discard. Mount handle with  
the (4) remaining item 4 screws.  
ASSEMBLY OF PRECISION TIG  
4. Lay the upper cylinder support and hook assembly  
on top of the rear baffle and filler rod holder aligning  
the top holes. Fasten in (4) places with item 8  
screws as shown.  
SAFETY PRECAUTIONS  
WARNING  
5. Add items 9 through 12 to the lift bale as shown to  
prevent use of the lift bale with when gas bottles  
have been loaded. See figure A-2 below.  
Protect yourself and others from serious injury  
ELECTRIC SHOCK Can Kill  
• Disconnect input before servicing.  
• Do not touch electrically live parts.  
• Do not touch live parts  
8
12 11 10  
9
2
• Only qualified persons should perform this  
installation.  
• This Undercarriage is designed to handle up to  
two gas Cylinders.  
3
• After Installation, check all mounting hardware to  
assure tightness.  
• Never use Lift Bale when Undercarriage and  
Upper Cylinders Supports are attached.  
• Keep all Gas Cylinders, placed on Cylinder  
Platform, tightly chained to Upper Cylinder  
Support!  
4
1
4
5
6
7
CYLINDER may explode if damaged.  
• Gas under pressure is explosive.  
Always keep gas cylinders in an  
upright position and always keep  
chained to undercarriage or stationary  
support.  
FIGURE A-2  
K1828-1 Under-Cooler Cart: Installation Instructions  
Items Part Number  
Description  
Req”d  
1
2
G3941  
Under-Cooler Cart  
Upper Cylinder Support  
and Hook Assembly  
Handle  
1
1
• Cylinders should be located:  
M19767  
1. Away from areas where they may be  
struck or subjected to physical damage.  
2. A safe distance from arc welding or cut-  
ting operations and any other source of  
heat, sparks or flame  
3
4
L11682  
S9225-47  
1
8
5/16-18 x 1.50 Thread  
Forming Screw  
5/16-18 Hex Nut  
5/16 Lock Washer  
5/16 Plain Washer  
1/4-20 x .50 Thread  
Forming Screw  
1/2-13 x 1.25 Hex Head  
Cap Screw  
1/2 Plain Washer  
(2.25 O.D.)  
1/2 Lock Washer  
1/2-13 Hex Nut  
5
6
7
8
CF000029  
E106A-14  
S9262-121  
S9225-68  
4
4
4
4
• Never lift a welder with a cylinder attached.  
• Never allow welding electrode to touch cylinder.  
• Read and follow the instructions on compressed  
gas cylinders, associated equipment and CGA  
publication P-1, “Precautions for Safe Handling of  
Compressed Gases in Cylinders,” available from  
the Compressed Gas Associate.,1235 Jefferson  
Davis Highway, Arlington VA. 22202  
9
CF000030  
S9262-62  
1
2
10  
11  
12  
E106A-15  
CF000027  
1
1
UNDER-COOLER CART  
 
A-5  
A-5  
INSTALLATION  
FASTENER QUICK REFERENCE  
(FULL SCALE)  
SEE FIGURE A-2 Assembly for fastener placement.  
-8-  
-4-  
-7-  
-5-  
-6-  
-12-  
-11-  
-9-  
-10-  
CONNECTION OF TIG TORCHES  
Installation of TIG torches to be used with this  
Precision TIG Under-Cooler cart is explained in the  
Precision TIG machine literature. The torch does not  
directly attach to the cooler but through a connection  
box mounted on the TIG machine.  
UNDER-COOLER CART  
 
B-1  
B-1  
OPERATION  
SAFETY PRECAUTIONS  
GENERAL DESCRIPTION  
The Under-Cooler cart is an internal type, re-circula-  
tion cooling system designed for use with water-  
cooled TIG torches. The coolant "IN" and "OUT" con-  
nections are 5/8-18 left-hand female threads which  
match the standard connector nut of domestic water  
hoses (CGA style) and water-cooled TIG torches.  
The Under-Cooler cart can either run with the "cooler  
as needed" circuit, which operates in conjunction with  
the TIG machine fan, or continuously, powered on and  
off with the TIG machine power switch.  
WARNING  
ELECTRIC SHOCK can kill.  
• Disconnect input power by remov-  
ing plug from receptacle before  
working inside Cooler.  
• Do not operate with covers  
removed.  
• Use only grounded receptacle.  
• Do not remove the power cord ground prong.  
• Do not touch electrically “hot” parts inside  
Cooler.  
The overall size and shape of the Under-Cooler cart is  
designed for mounting the Precision TIG 275 / 375  
machine on top. The Under-Cooler cart plugs into a  
115 V power receptacle in the rear of the machine and  
is rated for both 50 or 60 HZ. Adding coolant to the  
reservoir is simple and connecting to the coolant "IN"  
and "OUT" connections are easily made with an  
adjustable wrench.  
• Have qualified personnel do the installation,  
maintenance and troubleshooting work.  
• Never operate the cooler with the cooler drawer  
opened except to temporarily check coolant  
flow in the reservoir.  
• Unplug the cooler before performing general  
maintenance without removing drawer.  
• High voltage typical of welding operations can  
kill.  
• Immersion in water around electrical lines can  
cause electrical shock.  
• Moving parts can injure. Never place fingers  
into openings of Cooler.  
• Unplug the cooler and remove water hoses to  
remove drawer from the cabinet for mainte-  
nance purposes. A jumper hose between the  
coolant in and out connections should be  
installed to avoid excessive loss of coolant in  
the system.  
• Never operate the cooler with the reservoir fill  
cap off.  
• Hot coolant can burn skin. Always be sure  
coolant is NOT HOT before servicing the cooler.  
• Do not pour used ethylene glycol coolant down  
the drain.  
The Under-Cooler cart coolant flow is circulated  
through a heat exchanger to remove heat energy from  
the coolant. The coolant flow is then deposited into  
the coolant reservoir. The pump draws its coolant sup-  
ply from the coolant reservoir and delivers coolant to  
the welding torch. Refer to Flow Diagram Section F.  
CAUTION  
DO NOT USE A WATER SOLENOID VALVE with  
the Under-Cooler Cart.  
-----------------------------------------------------------------------  
RECOMMENDED PROCESSES  
The Under-Cooler Cart is designed for use with the  
Precision TIG 275 and Precision TIG 375 machines.  
The recommended 115 V power receptacle is labeled  
"cooler as needed". This receptacle shuts on and off  
in conjunction with the TIG machine fan. By using this  
receptacle, the duty cycle of the cooler is greatly  
reduced and lets the cooler run only when needed.  
• Do not remove the pump relief valve's 3/4" hex  
nut or attempt to adjust the relief valve setting.  
---------------------------------------------------------------------  
See additional warning information at  
front of this operator’s manual.  
RECOMMENDED EQUIPMENT  
-----------------------------------------------------------  
The Under-Cooler cart is designed for use with the  
Precision TIG 275 and Precision TIG 375 and any  
water cooled TIG Torches applicable. Although the  
cooler could operate as a standalone unit, the cart has  
been designed specifically to mount these two TIG  
machines only.  
UNDER-COOLER CART  
 
B-2  
B-2  
OPERATION  
TURNING THE SYSTEM "ON"  
COOLING EFFICIENCY  
The high cooling efficiency of the Under-Cooler cart  
offers a cooler, more comfortable weld than conven-  
tional air-cooled procedures as well as leading com-  
petitors water cooled systems.  
CAUTION  
After connecting the Precision Tig and Tig  
Torches per Installation Section, plug the unit into  
a 115V NEMA electrical receptacle for start-up  
operation. Be certain that the power input into the  
unit matches the Cooler's rated input.  
The Under-Cooler cart effectively removes the heat of  
the arc away from the torch handle and places it into  
the exiting air flow at the back of the Cooler. Ambient  
air temperature affects the coolant temperature of the  
cooler.  
The following should always be observed when  
operating the Under-Cooler Cart:  
Unlike other water coolers that depend on bulky reser-  
voir size, the high efficiency components of the Under-  
Cooler cart allows the reservoir size to be small. The  
result is a lightweight unit, in a drawer with additional  
storage space for welding accessories.  
• Check the coolant reservoir level daily.  
• Keep the reservoir full especially after changing  
any water lines.  
• The cooler should turn on as soon as an arc is  
struck and remain on approximately 8 min. after  
welding is stopped.  
• Be certain that the cooler is ON by checking the  
flow under the fill cap.  
• Never operate the cooler with the reservoir fill  
cap removed after checking the flow.  
• Avoid placing the Under-Cooler Cart and TIG  
Welder near a flux hopper or an area where dust  
build-up is extreme.  
• Avoid kinking or putting sharp bends in any  
water lines.  
• Keep all water lines clean and free of any block-  
age.  
• Do not operate cooler without coolant in reser-  
voir. Never run pump dry.  
• Never lift the Precision TIG by its lift bale once  
the under-cooler cart has been installed.  
• Never lift the Precision TIG and Under-Cooler  
cart by its handle.  
-----------------------------------------------------------------------  
You will be able to hear the fan running and feel air-  
flow out of the back of the unit when the cooler is  
operating. The cooler will run continuously unless it is  
plugged into the switched receptacle on the power  
source (bottom 115V receptacle).  
The coolant FLOW INDICATOR is accessed by  
removal of the fill cap. Actual return flow is directly vis-  
ible, via the fill opening of the reservoir with the draw-  
er open. SHUT THE COOLER DRAWER DURING  
NORMAL OPERATION.  
When first starting the unit, check all of the coolant  
hoses to insure that no water leaks are present.  
Water leakage causes poor welding performance,  
poor cooling performance, low welding component life  
and potential electrical safety hazards.  
UNDER-COOLER CART  
 
D-1  
D-1  
MAINTENANCE  
SAFETY PRECAUTIONS  
PUMP  
WARNING  
The pump head has a "built in" strainer on the inlet  
side of the pump. It is recommended to clean or  
replace the pump’s inlet strainer at least annually  
as follows:  
Have qualified personnel do the maintenance  
work. 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 mainte-  
nance requiring their removal is complete.  
Always use the greatest care when working near  
moving parts.  
• Drain the coolant reservoir and all coolant lines.  
Dispose of the coolant properly as specified above.  
• Hold the pump head firmly to apply a counter-torque  
when loosing the strainers 7/8" acorn nut located on  
the bottom. Do not confuse with 3/4" acorn nut.  
Remove nut and slide inlet strainer down and out  
from the pump head.  
-----------------------------------------------------------------------  
ELECTRIC SHOCK can kill.  
• Do not touch electrically live parts or  
electrode with skin or wet clothing.  
• Insulate yourself from work and  
ground  
• Gently rinse the strainer under running water to  
thoroughly clean it.  
• Always wear dry insulating gloves.  
------------------------------------------------------------------------  
MOVING PARTS can injure.  
• Use a mirror to inspect the inside of the pump for  
contamination. Carefully remove hardened debris  
with a dental pick if necessary, without scratching  
the inside of the pump.  
• Do not operate with doors open or  
guards off.  
• Keep away from moving parts.  
------------------------------------------------------------------------  
• Reinstall the strainer and 7/8 acorn nut, tighten to 75  
in-lbs.(8.5N-m) of torque. Wipe dry all area wetted  
with coolant. Dispose of coolant soaked towels  
properly as specified above.  
Observe all Safety Guidelines detailed throughout  
this manual. Be sure to disconnect the Under-  
Cooler cart from the Power Source before  
performing any maintenance procedures.  
---------------------------------------------------------  
ROUTINE  
PUMP MOTOR  
The Under-Cooler cart is rated for continuous  
operation. It is recommended to re-oil the pump  
motor bearings once a year as follows:  
Remove accumulated dust and dirt from the internal  
components of the cooler by blowing it out with a low-  
pressure air hose or removing it with a vacuum hose.  
• Remove the plastic plugs located on the top of both  
the inboard and outboard bearing end-caps.  
PERIODIC  
• Re-oil each bearing with 30-35 drops of SAE 20 oil  
then reinstall both plugs.  
In dirty or dusty environments or if biological growth  
occurs in the coolant, it may be necessary to flush the  
coolant reservoir. Dump the old coolant, rinse the  
inside of the reservoir and circulate rinsing solution  
through coolant system. Add new coolant when  
cleaning is finished. It is recommended to flush the  
coolant at least once a year. A cooling system free  
from debris offers increased cooling efficiency and  
longer pump and torch life. See the coolant treatment  
recommendation in “Section D-2”.  
HEAT EXCHANGER  
To maintain maximum cooler efficiency, the heat  
exchanger should be kept free of dust and dirt build-  
up. Clean the heat exchanger periodically using a  
vacuum hose or a low-pressure air line. Avoid placing  
the unit near a flux hopper or a flux waste container.  
A clean heat exchanger offers better cooling perfor-  
mance and longer product life. In extremely dirty  
environments, it may be necessary to remove the  
heat exchanger completely from the cooler and clean  
the fins with soap and water. Use care to avoid  
damaging the fins.  
NOTE: Pure solutions and mixtures of, or materials  
(i.e. towels) wetted with ethylene glycol are toxic to  
humans and animals. They must not be haphazardly  
discarded, especially by pouring liquids down the  
drain. Contact the local EPA office for responsible  
disposal methods or for recycling information.  
UNDER-COOLER CART  
 
D-2  
D-2  
MAINTENANCE  
RESERVOIR COOLANT LEVEL  
Preparation:  
• Always switch off the Precision TIG machine power.  
• Always disconnect the Under-Cooler cart from the  
TIG machine receptacle.  
• Be sure that the coolant presently in the system is at  
room temperature to avoid being burned.  
• Personal safety equipment: chemical safety glasses,  
rubber gloves.  
The reservoir volume should be checked daily before  
using the cooler. Remove the reservoir fill cap and  
check the coolant level. The reservoir is full when the  
coolant level is just below the input elbow of the reser-  
voir (approximate. 2 Gal / 7.6 ltrs). Keep the reservoir  
full, especially after disconnecting the water lines or  
changing the accessory being cooled.  
• See applicable MSDS for additional information.  
• Contact the additive manufacturer, local EPA office  
or applicable environmental agency for responsible  
disposal methods of both used, treated coolant and  
used disinfectant.  
• Safety hazards are identified in equipment instruc-  
tion manuals: refer to specific Power Source  
machine manual and Under-Cooler cart IM723.  
COOLANT TREATMENT  
RECOMMENDATION  
This procedure is intended to provide a means of  
reducing the objectionable amount of fungal and bac-  
terial contamination that has occurred in Under-Cooler  
cart water coolers and cooling systems.  
Drain the cooling system of contaminated coolant:  
Limitations:  
• Do not reuse this coolant.  
• If system contained an antifreeze-based coolant,  
rinse the cooling system until it is clear of antifreeze  
solution.  
• This additive should be used with fresh coolants con-  
taining only pure water.  
• This additive should not be used with coolants con-  
taining any other substance, including antifreeze  
substances.  
Service the cooler:  
• No other additives shall be used with the specified  
coolant that has been treated with the recommended  
additive.  
• This procedure is no permanent substitute for a peri-  
odic maintenance schedule for the specified coolers  
• A 1 quart bottle of additive is sufficient to disinfect  
and treat about 720 coolers.  
• Check with the manufacturer of your guns or  
torches to be sure that this procedure is compat-  
ible with your equipment.  
• Always unplug the cooler and remove hoses con-  
nected to the TIG machine. Remove the cooler  
drawer for thorough cleaning and disinfecting of sys-  
tem.  
• Independently flush out the welding accessories of  
debris if necessary  
• Mechanically clean out the cooler, including reser-  
voir, of debris if necessary. Power washing may be  
useful.  
• Clean or replace the pump’s inlet strainer as  
required  
a. Additive: "Poly Algaecide 30X" containing 30% of  
active ingredient Poly oxyethylene (dimethylimino)  
ethylene (dimethylimino) ethylene dichloride.  
b. Cooler: Lincoln part number see Parts Pages of  
this manual.  
c. Cooling system: the entire system, including cool-  
er and accessories (torch, all connecting hoses,  
etc.)  
d. Disinfectant: A user-prepared mixture of fresh,  
pure water and additive concentrated to 200 ppm  
maximum.  
e. ppm: parts per million  
f. Treated coolant: A user-prepared mixture of fresh,  
pure water and additive concentrated to a nominal  
of 30 ppm  
UNDER-COOLER CART  
 
D-3  
D-3  
MAINTENANCE  
Disinfect the cooling system:  
PROCEDURE  
Preparation:  
• Prepare the disinfectant: Make a quantity of only is  
needed to avoid an excess.  
• Bulk preparation (for coolers serviced in quantity):  
2.325 gals. (8.775 liters) of pure, fresh water per  
cooler 1.625 ml of additive per cooler  
• Example: for 100 coolers, add 162.5 ml to 232.5  
gals. of pure fresh water Pour 2.0 gals. (7.55 liters)  
of disinfectant into the empty reservoir  
• Recap the reservoir, tape over the air vent in the  
cap, roll disinfectant around the inside the reservoir  
to thoroughly coat all of its surfaces.  
• Always switch off the Precision TIG machine power  
• Always disconnect the Under-Cooler cart from the  
Tig machine receptacle.  
• Always allow the coolant in the system to cool  
enough to avoid burn injuries.  
• Avoid contact with contaminated coolant. Wear  
waterproof gloves and protective eyewear.  
• Do not remove the pump relief valves 3/4 in. acorn  
hex nut or attempt to adjust the relief valve setting.  
• Remove the tape from the reservoir cap. Prime the  
cooling system and circulate disinfectant through it  
for 10 to 15 minutes.  
• Drain disinfectant from the cooling system. Do not  
reuse this solution.  
• Add new, fresh coolant to the cooling system. Add  
0.325 gals. (1.225 liters) of fresh disinfectant to the  
system by pouring it into the reservoir, then reduce  
the concentration to the nominal 30 ppm:  
• Add the balance 1.675 gals. (6.325 liters) of fresh,  
pure water to the reservoir to create the treated  
coolant concentration  
Inspect condition of coolant:  
a. If coolant is contaminated or old:  
• Drain the system of coolant and dispose of it in an  
environmentally responsible manner.  
• Flush system of old coolant.  
• Fill with fresh tap or distilled water, run for ten min-  
utes, and drain.  
• Proceed to adding coolant.  
b. If coolant is clean and fresh:  
• If clean, dedicated coolant handling equipment,  
including a clean siphon pump and a clean holding  
tank are available then proceed to servicing the  
pump inlet strainer.  
• Prime the cooling system  
• Check coolant level. Add more fresh, pure water if  
required, without adding more than 0.125 gal. (0.475  
liters) of pure water to prevent diluting the coolant  
additive.  
Removing Coolant:  
Additive:  
a. Drain coolant from the reservoir using clean  
siphoning equipment.  
b. Coolant level should be drained below the filter’s  
pressure fitting:  
• This prevents coolant from streaming out of unit  
when filter nut is removed.  
The recommended additive can be purchased at local  
pool supply stores. An example is "Maintain Pool Pro  
30% Non-Foam Algaecide".  
PUMP INLET FILTER  
Poor cooler performance can usually be traced to a  
partially or completely blocked pump inlet filter. This is  
a user-serviceable item and can be cleaned and  
reused, or replaced. Continued pump operation with a  
blocked filter can cause:  
• Voiding of cooler service warranty  
• Cavitation damage to the pump heads inlet areas  
• Welding accessory damage from overheating due to  
insufficient coolant flow rate.  
A new or properly cleaned pump inlet filter should  
restore the cooler’s performance.  
For additional service and periodic maintenance  
details and for recommended coolants, follow the rec-  
ommendations listed in the following paragraphs.  
UNDER-COOLER CART  
 
D-4  
D-4  
MAINTENANCE  
Service the pump’s inlet strainer:  
a. Place absorbent towels underneath pump head to  
prevent stray coolant from wetting cooler’s electrical  
components.  
b. Hold pump head to apply counter torque when loos-  
ening strainers 7/8 acorn nut. Do not confuse with  
3/4 acorn nut. Remove nut and slide inlet strainer  
down and out from pump head. See figure 3A.  
c. Inspect strainer for damage or excessive clogging:  
Replace or Gently rinse strainer under running  
water to thoroughly clean it  
d. Use a mirror to inspect inside of pump for contami-  
nation. If hardened debris is present and interferes  
with filter seating, carefully remove it with dental  
pick without scratching inside of the pump. Use  
care not to drop debris into pump.  
e. Reinstall strainer and acorn nut, tighten to 75 in-  
lbs.(8.5N-m) of torque. Hold pump head to apply  
counter-torque when loosening strainers 7/8 acorn  
nut.  
f. Wipe dry all areas wetted by coolant. Dispose of  
towels in an environmentally responsible manner.  
Add coolant:  
• Add 2 Gal. ( 7.6 ltrs.) of coolant, either the recom-  
mendations off the water cooled accessory or if  
none, see the design specification summary listed in  
this manual.  
ADDITIONAL SERVICE NOTES:  
• Always use a back-up wrench on pump head when  
loosening or tightening pump fittings.  
• Never run the pump dry. Always use a recommend-  
ed coolant, otherwise pump damage may result.  
• Flush coolant from system and replace with  
fresh, recommended coolant at least once a  
year. More frequent flushing may be necessary,  
depending upon the user’s particular system or  
its usage, especially if it is prone to clogging  
from biological growth in the coolant.  
UNDER-COOLER CART  
 
E-1  
E-1  
TROUBLESHOOTING  
HOW TO USE TROUBLESHOOTING GUIDE  
WARNING  
Service and Repair should only be performed by Lincoln Electric Factory Trained Personnel.  
Unauthorized repairs performed on this equipment may result in danger to the technician and  
machine operator and will invalidate your factory warranty. For your safety and to avoid Electrical  
Shock, please observe all safety notes and precautions detailed throughout this manual.  
__________________________________________________________________________  
This Troubleshooting Guide is provided to help you  
locate and repair possible machine malfunctions.  
Simply follow the three-step procedure listed below.  
Step 3. RECOMMENDED COURSE OF ACTION  
This column provides a course of action for the  
Possible Cause, generally it states to contact your  
local Lincoln Authorized Field Service Facility.  
Step 1. LOCATE PROBLEM (SYMPTOM).  
Look under the column labeled “PROBLEM (SYMP-  
TOMS)”. This column describes possible symptoms  
that the machine may exhibit. Find the listing that  
best describes the symptom that the machine is  
exhibiting.  
If you do not understand or are unable to perform the  
Recommended Course of Action safely, contact your  
local Lincoln Authorized Field Service Facility.  
Step 2. POSSIBLE CAUSE.  
The second column labeled “POSSIBLE CAUSE” lists  
the obvious external possibilities that may contribute  
to the machine symptom.  
CAUTION  
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your  
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.  
UNDER-COOLER CART  
 
E-2  
E-2  
TROUBLESHOOTING  
Observe all Safety Guidelines detailed throughout this manual  
PROBLEMS  
(SYMPTOMS)  
POSSIBLE AREAS OF  
MISADJUSTMENTS  
RECOMMENDED  
COURSE OF ACTION  
Cooler does not operate  
1. Input cord unplugged.  
2. Power harness damaged.  
3. Water lines blocked or crimped.  
4. Leak in gun or water hoses.  
5. Coolant reservoir empty.  
6. The system needs to be primed.  
Internal water leak.  
1. Hose clamp loose on one of  
internal hoses.  
2. Internal hose punctured.  
3. Heat exchanger leaking.  
4. Pump seal is leaking.  
If all recommended possible areas  
of misadjustment have been  
checked and the problem persists,  
Contact your local Lincoln  
Authorized Field Service Facility.  
Torch or gun runs hot.  
1. Unit placed by area of extreme  
heat.  
2. Low coolant flow.  
3. No coolant flow.  
4. Fan not operating.  
5. Heat exchanger clogged.  
6. Pump seal is leaking  
Fan operates but there is low 1. Leak in torch/gun or hoses.  
coolant flow.  
2. Torch/gun or hoses partially  
obstructed.  
3. Reservoir empty or very low.  
4. Pump Strainer is dirty.  
Fan operates but there is no 1. Pump or pump motor failure.  
coolant flow.  
2. Pump strainer is blocked.  
Pump operates, but fan does not.  
1. Loose or disconnected fan lead.  
2. Obstruction in fan blade.  
3. Fan motor failure.  
CAUTION  
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your  
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.  
UNDER-COOLER CART  
 
F-1  
F-1  
WIRING DIAGRAM  
UNDER-COOLER CART  
 
F-2  
F-2  
DIAGRAM  
UNDER-COOLER CART  
 
F-3  
F-3  
DIMENSION PRINT  
UNDER-COOLER CART  
 
NOTES  
UNDER-COOLER CART  
 
NOTES  
UNDER-COOLER CART  
 
NOTES  
UNDER-COOLER CART  
 
Do not touch electrically live parts or  
electrode with skin or wet clothing.  
Insulate yourself from work and  
ground.  
Keep flammable materials away.  
Wear eye, ear and body protection.  
WARNING  
Spanish  
No toque las partes o los electrodos Mantenga el material combustible  
Protéjase los ojos, los oídos y el  
bajo carga con la piel o ropa moja-  
da.  
Aislese del trabajo y de la tierra.  
fuera del área de trabajo.  
cuerpo.  
AVISO DE  
PRECAUCION  
French  
Ne laissez ni la peau ni des vête-  
ments mouillés entrer en contact  
avec des pièces sous tension.  
Gardez à l’écart de tout matériel  
inflammable.  
Protégez vos yeux, vos oreilles et  
votre corps.  
ATTENTION  
Isolez-vous du travail et de la terre.  
German  
Berühren Sie keine stromführenden  
Teile oder Elektroden mit Ihrem  
Körper oder feuchter Kleidung!  
Isolieren Sie sich von den  
Entfernen Sie brennbarres Material! Tragen Sie Augen-, Ohren- und Kör-  
perschutz!  
WARNUNG  
Elektroden und dem Erdboden!  
Portuguese  
Não toque partes elétricas e elec-  
trodos com a pele ou roupa molha-  
da.  
Mantenha inflamáveis bem guarda- Use proteção para a vista, ouvido e  
dos.  
corpo.  
ATENÇÃO  
Isole-se da peça e terra.  
Japanese  
Chinese  
Korean  
Arabic  
READ AND UNDERSTAND THE MANUFACTURER’S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TO BE  
USED AND FOLLOW YOUR EMPLOYER’S SAFETY PRACTICES.  
SE RECOMIENDA LEER Y ENTENDER LAS INSTRUCCIONES DEL FABRICANTE PARA EL USO DE ESTE EQUIPO Y LOS  
CONSUMIBLES QUE VA A UTILIZAR, SIGA LAS MEDIDAS DE SEGURIDAD DE SU SUPERVISOR.  
LISEZ ET COMPRENEZ LES INSTRUCTIONS DU FABRICANT EN CE QUI REGARDE CET EQUIPMENT ET LES PRODUITS A  
ETRE EMPLOYES ET SUIVEZ LES PROCEDURES DE SECURITE DE VOTRE EMPLOYEUR.  
LESEN SIE UND BEFOLGEN SIE DIE BETRIEBSANLEITUNG DER ANLAGE UND DEN ELEKTRODENEINSATZ DES HER-  
STELLERS. DIE UNFALLVERHÜTUNGSVORSCHRIFTEN DES ARBEITGEBERS SIND EBENFALLS ZU BEACHTEN.  
 
Keep your head out of fumes.  
Use ventilation or exhaust to  
remove fumes from breathing zone.  
Turn power off before servicing.  
Do not operate with panel open or  
guards off.  
WARNING  
Spanish  
Los humos fuera de la zona de res-  
piración.  
Mantenga la cabeza fuera de los  
humos. Utilice ventilación o  
aspiración para gases.  
Desconectar el cable de ali-  
mentación de poder de la máquina  
antes de iniciar cualquier servicio.  
No operar con panel abierto o  
guardas quitadas.  
AVISO DE  
PRECAUCION  
French  
Débranchez le courant avant l’entre- N’opérez pas avec les panneaux  
tien.  
Gardez la tête à l’écart des fumées.  
Utilisez un ventilateur ou un aspira-  
teur pour ôter les fumées des zones  
de travail.  
ouverts ou avec les dispositifs de  
protection enlevés.  
ATTENTION  
German  
Strom vor Wartungsarbeiten  
abschalten! (Netzstrom völlig öff-  
nen; Maschine anhalten!)  
Anlage nie ohne Schutzgehäuse  
oder Innenschutzverkleidung in  
Betrieb setzen!  
Vermeiden Sie das Einatmen von  
Schweibrauch!  
Sorgen Sie für gute Be- und  
Entlüftung des Arbeitsplatzes!  
WARNUNG  
Portuguese  
Não opere com as tampas removidas.  
Desligue a corrente antes de fazer  
serviço.  
Mantenha-se afastado das partes  
moventes.  
Não opere com os paineis abertos  
ou guardas removidas.  
Mantenha seu rosto da fumaça.  
Use ventilação e exhaustão para  
remover fumo da zona respiratória.  
ATENÇÃO  
Não toque as partes elétricas nuas.  
Japanese  
Chinese  
Korean  
Arabic  
LEIA E COMPREENDA AS INSTRUÇÕES DO FABRICANTE PARA ESTE EQUIPAMENTO E AS PARTES DE USO, E SIGA AS  
PRÁTICAS DE SEGURANÇA DO EMPREGADOR.  
 
World's Leader in Welding and Cutting Products •  
Sales and Service through Subsidiaries and Distributors Worldwide •  
Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com  
 

Krown Manufacturing Home Security System KBS300RX User Manual
LG Electronics Cell Phone Cosmos User Manual
LG Electronics Cell Phone UX700W User Manual
LG Electronics Microwave Oven LMVM1955SB User Manual
Linksys Network Router WET54G V3 User Manual
Little Tikes Baby Gym ISPE002AA User Manual
Logitech Mouse G400 User Manual
Lux Products Thermostat P621U User Manual
Manitowoc Ice Ice Maker S600M User Manual
MB QUART Car Stereo System RVF 269 User Manual