Thermal Arc Mega-Arc 3525DD, MX

Thermal Arc Mega-Arc 3525DD, MX
MEGA-ARC® 3525DD
(In Europe, MEGA-ARC MX-400DD)
250 Amp Constant Current Diesel
Engine-Driven Welding Generator
For the Following Specs:
• 500005-1
• 500005B-1
• 500005C-1
OWNER’S MANUAL Number 430429-177
Revised December 1, 1997
IMPORTANT: Read these instructions before installing, operating, or servicing this system.
THERMAL ARC INC., TROY, OHIO 45373-1085, U.S.A.
430429-177
Table of Contents
CALIFORNIA
Proposition 65 Warning
Diesel engine exhaust and some of its constituents
are known to the State of California to cause cancer,
birth defects, and other reproductive harm.
INTRODUCTION
1
How To Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Equipment Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Receipt Of Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
SAFETY INSTRUCTIONS AND WARNINGS
2
DESCRIPTION OF EQUIPMENT
3
Generator . . . . . . . . . . . .
Engine . . . . . . . . . . . . .
Identification . . . . . . . . . .
Tabulated Data . . . . . . . . .
Supplementary Materials . . . .
Engine Controls and Instruments
Generator Controls . . . . . . .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
INSTALLATION
General . . . . . . . . . .
Location . . . . . . . . . .
Safety . . . . . . . . . . .
Indoor Installation . . . . .
Portable Installation . . . .
Initial Preparation For Use
Welding Leads . . . . . .
4
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
OPERATION
Prestarting Instructions . . . .
Break-in Procedures . . . . .
Prewelding Instructions . . . .
Welding . . . . . . . . . . . .
Stopping The Engine . . . . .
Storage . . . . . . . . . . . .
Adverse Weather Precautions
4-1
4-1
4-1
4-1
4-1
4-2
4-3
5
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
MAINTENANCE
Engine And Related Components
Inspection And Cleaning . . . . .
Lubrication . . . . . . . . . . . .
Exciter/Auxiliary Brushes . . . . .
Failure To Build Up Voltage . . . .
May 21, 1997 Revised
3-1
3-1
3-1
3-1
3-2
3-2
3-3
5-1
5-1
5-1
5-2
5-2
5-2
5-2
6
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
6-1
6-1
6-1
6-1
6-2
Page 1
430429-177
Table of Contents
TROUBLESHOOTING
7
PARTS LIST
8
Equipment Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
How To Use This Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
MATERIAL SAFETY DATA SHEET
DIAGRAMS
Page 2
December 1, 1997 Revised
430429-117
INTRODUCTION
INTRODUCTION
How To Use This Manual
Receipt Of Equipment
This Owner’s Manual usually applies to just the
underlined specification or part numbers listed on
the cover. If none are underlined, they are all covered by this manual.
When you receive the equipment, check it against
the invoice to make sure it is complete and inspect
the equipment for possible damage due to shipping.
If there is any damage, notify the carrier immediately to file a claim. Furnish complete information
concerning damage claims or shipping errors to
Thermal Arc, Order Department, 2200 Corporate
Drive, Troy, Ohio 45373-1085. Include all equipment identification numbers as described above
along with a full description of the parts in error.
To ensure safe operation, read the entire manual,
including the chapter on safety instructions and
warnings.
Throughout this manual, the words WARNING,
CAUTION, and NOTE may appear. Pay particular
attention to the information provided under these
headings. These special annotations are easily recognized as follows:
WARNING gives information regarding possible personal injury. Warnings will be enclosed
in a box such as this.
CAUTION refers to possible equipment
damage. Cautions will be shown in bold
type.
NOTE offers helpful information concerning certain operating procedures. Notes will
be shown in italics.
Equipment Identification
The unit’s identification number (specification or
part number), model, and serial number usually
appear on a nameplate attached to the control
panel. In some cases, the nameplate may be attached to the rear panel. Equipment which does not
have a control panel such as gun and cable assemblies are identified only by the specification or part
number printed on the shipping container. Record
these numbers for future reference.
December 1, 1997 Revised
Move the equipment to the installation site before
uncrating the unit. A lifting eye extends through the
top of the cabinet on most equipment to facilitate
handling with a hoist or crane. Use care to avoid
damaging the equipment when using bars, hammers, etc., to uncrate the unit.
WARNING: Falling machine due
to lifting eye failure may cause
death or serious injury.
• Lifting device may fail when overloaded.
• This lifting device is designed to lift the
power source ONLY. If the machine is
equipped with a trailer or accessories over
100 pounds, DO NOT LIFT by lifting eyes.
• Avoid sudden jerks, drops, or swinging.
• Check lifting device components visually
for looseness and signs of metal fatigue.
• Before changing any hardware, check
grade and size of bolts, and replace with
bolts of equal or higher size and grade.
Additional copies of this manual may be purchased by contacting Thermal Arc at the address
given above. Include the Owner’s Manual number
and equipment identification numbers.
1-1
430429-117
INTRODUCTION
This page intentionally left blank.
1-2
December 1, 1997 Revised
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
Instruction 830001
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
ARC WELDING can be hazardous.
PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER
WEARERS KEEP AWAY UNTIL CONSULTING YOUR DOCTOR. DO NOT LOSE THESE INSTRUCTIONS. READ OPERATING/INSTRUCTION MANUAL BEFORE INSTALLING, OPERATING OR SERVICING THIS EQUIPMENT.
Welding products and welding processes can cause serious injury or death, or damage to other equipment or property, if the operator does
not strictly observe all safety rules and take precautionary actions.
Safe practices have developed from past experience in the use of welding and cutting. These practices must be learned through study and
training before using this equipment. Anyone not having extensive training in welding and cutting practices should not attempt to weld. Certain
of the practices apply to equipment connected to power lines; other practices apply to engine driven equipment.
Safe practices are outlined in the American National Standard Z49.1 entitled: SAFETY IN WELDING AND CUTTING. This publication and
other guides to what you should learn before operating this equipment are listed at the end of these safety precautions.
HAVE ALL INSTALLATION, OPERATION, MAINTENANCE, AND REPAIR WORK PERFORMED ONLY BY QUALIFIED PEOPLE.
ELECTRIC SHOCK can kill.
Touching live electrical parts can cause fatal shocks
or severe burns. The electrode and work circuit is
electrically live whenever the output is on. The input
power circuit and machine internal circuits are also
live when power is on. In semiautomatic or automatic
wire welding, the wire, wire reel, drive roll housing,
and all metal parts touching the welding wire are
electrically live. Incorrectly installed or improperly
grounded equipment is a hazard.
1. Do not touch live electrical parts.
2. Wear dry, hole-free insulating gloves and body protection.
3. Insulate yourself from work and ground using dry insulating mats
or covers.
4. Disconnect input power or stop engine before installing or servicing this equipment. Lock input power disconnect switch open,
or remove line fuses so power cannot be turned on accidentally.
5. Properly install and ground this equipment according to its
Owner’s Manual and national, state, and local codes.
ARC RAYS can burn eyes and skin;
NOISE can damage hearing.
Arc rays from the welding process produce intense
heat and strong ultraviolet rays that can burn eyes
and skin. Noise from some processes can damage
hearing.
6. Turn off all equipment when not in use. Disconnect power to
equipment if it will be left unattended or out of service.
7. Use fully insulated electrode holders. Never dip holder in water
to cool it or lay it down on the ground or the work surface. Do not
touch holders connected to two welding machines at the same
time or touch other people with the holder or electrode.
8. Do not use worn, damaged, undersized, or poorly spliced cables.
9. Do not wrap cables around your body.
10. Ground the workpiece to a good electrical (earth) ground.
11. Do not touch electrode while in contact with the work (ground)
circuit.
12. Use only well-maintained equipment. Repair or replace damaged
parts at once.
13. In confined spaces or damp locations, do not use a welder with
AC output unless it is equipped with a voltage reducer. Use
equipment with DC output.
14. Wear a safety harness to prevent falling if working above floor
level.
15. Keep all panels and covers securely in place.
1. Wear a welding helmet fitted with a proper shade of filter (see
ANSI Z49.1 listed in Safety Standards) to protect your face and
eyes when welding or watching.
2. Wear approved safety glasses. Side shields recommended.
3. Use protective screens or barriers to protect others from flash
and glare; warn others not to watch the arc.
4. Wear protective clothing made from durable, flame-resistant
material (wool and leather) and foot protection.
5. Use approved ear plugs or ear muffs if noise level is high.
Eye protection filter shade selector for welding or cutting (goggles or helmet), from AWS A6.2-73.
Filter
Electrode Size
Shade
Welding or Cutting
Metal Thickness
No.
Operation
or Welding Current
2
Torch soldering
—
3 or 4
Torch brazing
—
Oxygen cutting
3 or 4
Light
Under 1 in., 25 mm
4 or 5
Medium
1 to 6 in., 25-150 mm
5 or 6
Heavy
Over 6 in., 150 mm
Gas welding
4 or 5
Light
Under 1/8 in., 3 mm
5 or 6
Medium
1/8 to 1/2 in., 3-12 mm
6 or 8
Heavy
Over 1/2 in., 12 mm
10
Shielded metal-arc welding
Under 5/32 in., 4 mm
12
(stick) electrodes
5/32 to 1/4 in., 4 to 6.4 mm
14
Over 1/4 in., 6.4 mm
May 8, 1996
Welding or Cutting
Operation
Gas metal-arc welding (MIG)
Non-ferrous base metal
Ferrous base metal
Gas tungsten arc welding (TIG)
Atomic hydrogen welding
Carbon arc welding
Plasma arc welding
Carbon arc air gouging
Light
Heavy
Plasma arc cutting
Light
Medium
Heavy
Electrode Size
Metal Thickness
or Welding Current
Filter
Shade
No.
All
All
All
All
All
All
11
12
12
12
12
12
12
14
Under 300 Amp
300 to 400 Amp
Over 400 Amp
9
12
14
2-1
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
Instruction 830001
FUMES AND GASES can be hazardous
to your health.
Welding produces fumes and gases. Breathing these
fumes and gases can be hazardous to your health.
1. Keep your head out of the fumes. Do not breath the fumes.
2. If inside, ventilate the area and/or use exhaust at the arc to
remove welding fumes and gases.
3. If ventilation is poor, use an approved air-supplied respirator.
4. Read the Material Safety Data Sheets (MSDSs) and the manufacturer’s instruction for metals, consumables, coatings, and
cleaners.
5. Work in a confined space only if it is well ventilated, or while
wearing an air-supplied respirator. Shielding gases used for
welding can displace air causing injury or death. Be sure the
breathing air is safe.
6. Do not weld in locations near degreasing, cleaning, or spraying
operations. The heat and rays of the arc can react with vapors to
form highly toxic and irritating gases.
7. Do not weld on coated metals, such as galvanized, lead, or
cadmium plated steel, unless the coating is removed from the
weld area, the area is well ventilated, and if necessary, while
wearing an air-supplied respirator. The coatings and any metals
containing these elements can give off toxic fumes if welded.
WELDING can cause fire or explosion.
5. Watch for fire, and keep a fire extinguisher nearby.
Sparks and spatter fly off from the welding arc. The
flying sparks and hot metal, weld spatter, hot workpiece, and hot equipment can cause fires and burns.
Accidental contact of electrode or welding wire to
metal objects can cause sparks, overheating, or fire.
6. Be aware that welding on a ceiling, floor, bulkhead, or partition
can cause fire on the hidden side.
1. Protect yourself and others from flying sparks and hot metal.
2. Do not weld where flying sparks can strike flammable material.
3. Remove all flammables within 35 ft (10.7 m) of the welding arc.
If this is not possible, tightly cover them with approved covers.
4. Be alert that welding sparks and hot materials from welding can
easily go through small cracks and openings to adjacent areas.
FLYING SPARKS AND HOT METAL can
cause injury.
Chipping and grinding cause flying metal. As welds
cool, they can throw off slag.
CYLINDERS can explode if damaged.
Shielding gas cylinders contain gas under high pressure. If damaged, a cylinder can explode. Since gas
cylinders are normally part of the welding process,
be sure to treat them carefully.
1. Protect compressed gas cylinders from excessive heat, mechanical shocks, and arcs.
2. Install and secure cylinders in an upright position by chaining
them to a stationary support or equipment cylinder rack to prevent
falling or tipping.
7. Do not weld on closed containers such as tanks or drums.
8. Connect work cable to the work as close to the welding area as
practical to prevent welding current from traveling long, possibly
unknown paths and causing electric shock and fire hazards.
9. Do not use welder to thaw frozen pipes.
10. Remove stick electrode from holder or cut off welding wire at
contact tip when not in use.
11. Wear oil-free protective garments such as leather gloves, heavy
shirt, cuffless trousers, high shoes, and a cap.
1. Wear approved face shield or safety goggles. Side shields recommended.
2. Wear proper body protection to protect skin.
3. Keep cylinders away from any welding or other electrical circuits.
4. Never allow a welding electrode to touch any cylinder.
5. Use only correct shielding gas cylinders, regulators, hoses, and
fittings designed for the specific application; maintain them and
associated parts in good condition.
6. Turn face away from valve outlet when opening cylinder valve.
7. Keep protective cap in place over valve except when cylinder is
in use or connected for use.
8. Read and follow instructions on compressed gas cylinders, associated equipment, and CGA publication P-1 listed in Safety
Standards.
ENGINES can be hazardous.
ENGINE EXHAUST GASES can kill.
Engines produce harmful exhaust gases.
2-2
1. Use equipment outside in open, well-ventilated areas.
2. If used in a closed area, vent engine exhaust outside and away
from any building air intakes.
May 8, 1996
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
Instruction 830001
ENGINE FUEL can cause fire or
explosion.
Engine fuel is highly flammable.
1. Stop engine before checking or adding fuel.
MOVING PARTS can cause injury.
Moving parts, such as fans, rotors, and belts can cut
fingers and hands and catch loose clothing.
1. Keep all doors, panels, covers, and guards closed and securely
in place.
2. Stop engine before installing or connecting unit.
SPARKS can cause BATTERY GASES
TO EXPLODE; BATTERY ACID can
burn eyes and skin.
Batteries contain acid and generate explosive gases.
STEAM AND PRESSURIZED HOT
COOLANT can burn face, eyes, and
skin.
The coolant in the radiator can be very hot and under
pressure.
2. Do not add fuel while smoking or if unit is near any sparks or open
flames.
3. Allow engine to cool before fueling. If possible, check and add
fuel to cold engine before beginning job.
4. Do not overfill tank — allow room for fuel to expand.
5. Do not spill fuel. If fuel is spilled, clean up before starting engine.
3. Have only qualified people remove guards or covers for maintenance and troubleshooting as necessary.
4. To prevent accidental starting during servicing, disconnect negative (-) battery cable from battery.
5. Keep hands, hair, loose clothing, and tools away from moving
parts.
6. Reinstall panels or guards and close doors when servicing is
finished and before starting engine.
1.
2.
3.
4.
5.
Always wear a face shield when working on a battery.
Stop engine before disconnecting or connecting battery cables.
Do not allow tools to cause sparks when working on a battery.
Do not use welder to charge batteries or jump start vehicles.
Observe correct polarity (+ and –) on batteries.
1. Do not remove radiator cap when engine is hot. Allow engine to
cool.
2. Wear gloves and put a rag over cap area when removing cap.
3. Allow pressure to escape before completely removing cap.
WARNING: This product, when used for welding or cutting, produces fumes or gases which contain chemicals known to the State
of California to cause birth defects and, in some cases, cancer.
(California Health & Safety Code Sec. 25249.5 et seq.)
NOTE: Considerations About Welding And The Effects Of Low Frequency Electric And Magnetic Fields
The following is a quotation from the General Conclusions Section of the U.S. Congress, Office of Technology Assessment, Biological Effects
of Power Frequency Electric & Magnetic Fields — Background Paper, OTA-BP-E-63 (Washington, DC: U.S. Government Printing Office, May
1989): “... there is now a very large volume of scientific findings based on experiments at the cellular level and from studies with animals and
people which clearly establish that low frequency magnetic fields can interact with, and produce changes in, biological systems. While most of
this work is of very high quality, the results are complex. Current scientific understanding does not yet allow us to interpret the evidence in a
single coherent framework. Even more frustrating, it does not yet allow us to draw definite conclusions about questions of possible risk or to
offer clear science-based advice on strategies to minimize or avoid potential risks.”
To reduce magnetic fields in the workplace, use the following procedures:
1. Keep cables close together by twisting or taping them.
3. Do not coil or drape cables around the body.
2. Arrange cables to one side and away from the operator.
4. Keep welding power source and cables as far away from body as
practical.
About Pacemakers:
The above procedures are among those also normally recommended for pacemaker wearers. Consult your doctor for complete information.
PRINCIPAL SAFETY STANDARDS
Safety in Welding and Cutting, ANSI Standard Z49.1, from American
Welding Society, 550 N.W. LeJeune Rd., Miami, FL 33126.
Safety and Health Standards, OSHA 29 CFR 1910, from Superintendent of Documents, U.S. Government Printing Office, Washington,
D.C. 20402.
Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet
P-1, from Compressed Gas Association, 1235 Jefferson Davis Highway, Suite 501, Arlington, VA 22202.
Code for Safety in Welding and Cutting, CSA Standard W117.2, from
Canadian Standards Association, Standards Sales, 178 Rexdale
Boulevard, Rexdale, Ontario, Canada M9W 1R3.
Recommended Safe Practices for the Preparation for Welding and
Cutting of Containers That Have Held Hazardous Substances, American Welding Society Standard AWS F4.1, from American Welding
Society, 550 N.W. LeJeune Rd., Miami, FL 33126.
Safe Practices for Occupation and Educational Eye and Face Protection, ANSI Standard Z87.1, from American National Standards
Institute, 1430 Broadway, New York, NY 10018.
National Electrical Code, NFPA Standard 70, from National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
Cutting and Welding Processes, NFPA Standard 51B, from National
Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
May 8, 1996
2-3
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
Instruction 830001
This page intentionally left blank.
2-4
May 8, 1996
PRECAUTIONS DE SECURITE EN SOUDAGE A L'ARC
Instruction 830002
PRECAUTIONS DE SECURITE EN SOUDAGE A L′ARC
LE SOUDAGE A L′ARC EST DANGEREUX
PROTEGEZ-VOUS, AINSI QUE LES AUTRES, CONTRE LES BLESSURES GRAVES POSSIBLES OU LA MORT. NE LAISSEZ PAS LES
ENFANTS S’APPROCHER, NI LES PORTEURS DE STIMULATEUR CARDIAQUE (A MOINS QU’ILS N’AIENT CONSULTE UN MEDECIN).
CONSERVEZ CES INSTRUCTIONS. LISEZ LE MANUEL D’OPERATION OU LES INSTRUCTIONS AVANT D’INSTALLER, UTILISER OU
ENTRETENIR CET EQUIPEMENT.
Les produits et procédés de soudage peuvent sauser des blessures graves ou la mort, de même que des dommages au reste du matériel
et à la propriété, si l’utilisateur n’adhère pas strictement à toutes les règles de sécurité et ne prend pas les précautions nécessaires.
En soudage et coupage, des pratiques sécuritaires se sont développées suite à l’expérience passée. Ces pratiques doivent être apprises
par étude ou entraînement avant d’utiliser l’equipement. Toute personne n’ayant pas suivi un entraînement intensif en soudage et coupage
ne devrait pas tenter de souder. Certaines pratiques concernent les équipements raccordés aux lignes d’alimentation alors que d’autres
s’adressent aux groupes électrogènes.
La norme Z49.1 de l’American National Standard, intitulée “SAFETY IN WELDING AND CUTTING” présente les pratiques sécuritaires à
suivre. Ce document ainsi que d’autres guides que vous devriez connaître avant d’utiliser cet équipement sont présentés à la fin de ces
instructions de sécurité.
SEULES DES PERSONNES QUALIFIEES DOIVENT FAIRE DES TRAVAUX D’INSTALLATION, DE REPARATION, D’ENTRETIEN ET
D’ESSAI.
L’E LE C T R OC UTION P E UT ETRE
MORTELLE.
Une décharge électrique peut tuer ou brûler gravement. L’électrode et le circuit de soudage sont sous
tension dès la mise en circuit. Le circuit d’alimentation et les circuits internes de l’équipement sont
aussi sous tension dès la mise en marche. En
soudage automatique ou semi-automatique avec
fil, ce dernier, le rouleau ou la bobine de fil, le
logement des galets d’entrainement et toutes les
pièces métalliques en contact avec le fil de soudage
sont sous tension. Un équipement inadéquatement
installé ou inadéquatement mis à la terre est dangereux.
1. Ne touchez pas à des pièces sous tension.
2. Portez des gants et des vêtements isolants, secs et non troués.
3. Isolez-vous de la pièce à souder et de la mise à la terre au moyen
de tapis isolants ou autres.
4. Déconnectez la prise d’alimentation de l’équipement ou arrêtez
le moteur avant de l’installer ou d’en faire l’entretien. Bloquez le
commutateur en circuit ouvert ou enlevez les fusibles de l’alimentation afin d’éviter une mise en marche accidentelle.
5. Veuillez à installer cet équipement et à le mettre à la terre selon
le manuel d’utilisation et les codes nationaux, provinciaux et
locaux applicables.
LE RAYONNEMENT DE L′ARC PEUT
BRÛLER LES YEUX ET LA PEAU; LE
BRUIT PEUT ENDOMMAGER L′OUIE.
L’arc de soudage produit une chaleur et des
rayons ultraviolets intenses, susceptibles de
brûler les yeux et la peau. Le bruit causé par
certains procédés peut endommager l’ouïe.
1. Portez une casque de soudeur avec filtre oculaire de nuance
appropriée (consultez la norme ANSI Z49 indiquée ci-après)
8-V-96
6. Arrêtez tout équipement après usage. Coupez l’alimentation de
l’équipement s’il est hors d’usage ou inutilisé.
7. N’utilisez que des porte-électrodes bien isolés. Ne jamais plonger
les porte-électrodes dans l’eau pour les refroidir. Ne jamais les
laisser traîner par terre ou sur les pièces à souder. Ne touchez
pas aux porte-électrodes raccordés à deux sources de courant
en même temps. Ne jamais toucher quelqu’un d’autre avec
l’électrode ou le porte-électrode.
8. N’utilisez pas de câbles électriques usés, endommagés, mal
épissés ou de section trop petite.
9. N’enroulez pas de câbles électriques autour de votre corps.
10. N’utilisez qu’une bonne prise de masse pour la mise à la terre
de la pièce à souder.
11. Ne touchez pas à l’électrode lorsqu’en contact avec le circuit de
soudage (terre).
12. N’utilisez que des équipements en bon état. Réparez ou remplacez aussitôt les pièces endommagées.
13. Dans des espaces confinés ou mouillés, n’utilisez pas de source
de courant alternatif, à moins qu’il soit muni d’un réducteur de
tension. Utilisez plutôt une source de courant continu.
14. Portez un harnais de sécurité si vous travaillez en hauteur.
15. Fermez solidement tous les panneaux et les capots.
2.
3.
4.
5.
pour vous protéger le visage et les yeux lorsque vous soudez ou
que vous observez l’exécution d’une soudure.
Portez des lunettes de sécurité approuvées. Des écrans latéraux
sont recommandés.
Entourez l’aire de soudage de rideaux ou de cloisons pour
protéger les autres des coups d’arc ou de l’éblouissement;
avertissez les observateurs de ne pas regarder l’arc.
Portez des vêtements en matériaux ignifuges et durables (laine
et cuir) et des chaussures de sécurité.
Portez un casque antibruit ou des bouchons d’oreille approuvés
lorsque le niveau de bruit est élevé.
2-1
PRECAUTIONS DE SECURITE EN SOUDAGE A L'ARC
Instruction 830002
SELECTION DES NUANCES DE FILTRES OCULAIRES POUR LA PROTECTION DES YEUX EN COUPAGE ET SOUDAGE
( selon AWS A 8.2-73 )
Opération
de
Coupage ou soudage
Brasage tendre au chalumeau
Brasage fort au chalumeau
Oxycoupage
mince
moyen
épais
Soudage aux gaz
mince
moyen
épais
Soudage à l’arc avec
electrode enrobées (SMAW)
Soudage à l’arc sous gaz
avec fil plein (GMAW)
métaux non-ferreux
métaux ferreux
Soudage à l’arc sous gaz
avec électrode de tungstène (GTAW)
Soudage à l’hydrogène
atomique (AHW)
Soudage à l’arc avec
électrode de carbone (CAW)
Soudage à l’arc Plasma (PAW)
Gougeage Air-Arc avec
électrode de carbone
mince
épais
Coupage à l’arc Plasma (PAC)
mince
moyen
épais
Dimension d’électrode ou
Epaisseur de métal ou
Intensité de courant
toutes conditions
toutes conditions
Nuance de
de filtre
oculaire
2
3 ou 4
moins de 1 po. (25 mm)
de 1 à 6 po. (25 à 150 mm)
plus de 6 po. (150 mm)
2 ou 3
4 ou 5
5 ou 6
moins de 1/8 po. (3 mm)
de 1/8 à 1/2 po. (3 à 12 mm)
plus de 1/2 po. (12 mm)
moins de 5/32 po. (4 mm)
de 5/32 à 1/4 po. (4 à 6.4 mm)
plus de 1/4 po. (6.4 mm)
4 ou 5
5 ou 6
6 ou 8
10
12
14
toutes conditions
toutes conditions
11
12
toutes conditions
12
toutes conditions
12
toutes conditions
toutes dimensions
12
12
12
14
moins de 300 ampères
de 300 à 400 ampères
plus de 400 ampères
LES VAPEURS ET LES FUMEES SONT
DANGEREUSES POUR LA SANTE.
Le soudage dégage des vapeurs et des fumées
dangereuses à respirer.
1. Eloignez la tête des fumées pour éviter de les respirer.
2. A l’intérieur, assurez-vous que l’aire de soudage est bien ventilée ou que les fumées et les vapeurs sont aspirées à l’arc.
3. Si la ventilation est inadequate, portez un respirateur à adduction d’air approuvé.
4. Lisez les fiches signalétiques et les consignes du fabricant
relatives aux métaux, aux produits consummables, aux revêtements et aux produits nettoyants.
2-2
9
12
14
5. Ne travaillez dans un espace confiné que s’il est bien ventilé;
sinon, portez un respirateur à adduction d’air. Les gaz protecteurs de soudage peuvent déplacer l’oxygène de l’air et ainsi
causer des malaises ou la mort. Assurez-vous que l’air est
propre à la respiration.
6. Ne soudez pas à proximité d’opérations de dégraissage, de
nettoyage ou de pulvérisation. La chaleur et les rayons de l’arc
peuvent réagir avec des vapeurs et former des gaz hautement
toxiques et irritants.
7. Ne soudez des tôles galvanisées ou plaquées au plomb ou au
cadmium que si les zones à souder ont été grattées à fond, que
si l’espace est bien ventilé; si nécessaire portez un respirateur
à adduction d’air. Car ces revêtements et tout métal qui contient
ces éléments peuvent dégager des fumées toxiques au moment
du soudage.
8-V-96
PRECAUTIONS DE SECURITE EN SOUDAGE A L'ARC
Instruction 830002
LE SOUDAGE PEUT CAUSER UN INCENDIE OU UNE EXPLOSION
L’arc produit des étincellies et des projections. Les
particules volantes, le métal chaud, les projections
de soudure et l’équipement surchauffé peuvent
causer un incendie et des brûlures. Le contact
accidentel de l’électrode ou du fil-électrode avec un
objet métallique peut provoquer des étincelles, un échauffement
ou un incendie.
1. Protégez-vous, ainsi que les autres, contre les étincelles et du
métal chaud.
2. Ne soudez pas dans un endroit où des particules volantes ou
des projections peuvent atteindre des matériaux inflammables.
3. Enlevez toutes matières inflammables dans un rayon de 10, 7
mètres autour de l’arc, ou couvrez-les soigneusement avec des
bâches approuvées.
LES ETINCELLES ET LES PROJECTIO N S BRU LA NTES PEU V EN T
CAUSER DES BLESSURES.
LES BOUTEILLES ENDOMMAGEES
PEUVENT EXPLOSER
Les bouteilles contiennent des gaz protecteurs
sous haute pression. Des bouteilles endommagées
peuvent exploser. Comme les bouteilles font normalement partie du procédé de soudage, traitezles avec soin.
1. Protégez les bouteilles de gaz comprimé contre les sources de
chaleur intense, les chocs et les arcs de soudage.
2. Enchainez verticalement les bouteilles à un support ou à un
cadre fixe pour les empêcher de tomber ou d’être renversées.
3. Eloignez les bouteilles de tout circuit électrique ou de tout
soudage.
4. Méfiez-vous des projections brulantes de soudage susceptibles
de pénétrer dans des aires adjacentes par de petites ouvertures
ou fissures.
5. Méfiez-vous des incendies et gardez un extincteur à portée de
la main.
6. N’oubliez pas qu’une soudure réalisée sur un plafond, un
plancher, une cloison ou une paroi peut enflammer l’autre côté.
7. Ne soudez pas un récipient fermé, tel un réservoir ou un baril.
8. Connectez le câble de soudage le plus près possible de la zone
de soudage pour empêcher le courant de suivre un long parcours inconnu, et prévenir ainsi les risques d’électrocution et
d’incendie.
9. Ne dégelez pas les tuyaux avec un source de courant.
10. Otez l’électrode du porte-électrode ou coupez le fil au tube-contact lorsqu’inutilisé après le soudage.
11. Portez des vêtements protecteurs non huileux, tels des gants
en cuir, une chemise épaisse, un pantalon revers, des bottines
de sécurité et un casque.
Le piquage et le meulage produisent des particules métalliques
volantes. En refroidissant, la soudure peut projeter du éclats de
laitier.
1. Portez un écran facial ou des lunettes protectrices approuvées.
Des écrans latéraux sont recommandés.
2. Portez des vêtements appropriés pour protéger la peau.
4. Empêchez tout contact entre une bouteille et une électrode de
soudage.
5. N’utilisez que des bouteilles de gaz protecteur, des détendeurs,
des boyauxs et des raccords conçus pour chaque application
spécifique; ces équipements et les pièces connexes doivent
être maintenus en bon état.
6. Ne placez pas le visage face à l’ouverture du robinet de la
bouteille lors de son ouverture.
7. Laissez en place le chapeau de bouteille sauf si en utilisation
ou lorsque raccordé pour utilisation.
8. Lisez et respectez les consignes relatives aux bouteilles de gaz
comprimé et aux équipements connexes, ainsi que la publication P-1 de la CGA, identifiée dans la liste de documents
ci-dessous.
LES MOTEURS PEUVENT ETRE DANGEREUX
LES GAZ D’ECHAPPEMENT DES
MOTEURS PEUVENT ETRE MORTELS.
Les moteurs produisent des gaz d’échappement
nocifs.
LE CARBURANT PEUR CAUSER UN INCENDIE OU UNE EXPLOSION.
Le carburant est hautement inflammable.
1. Arrêtez le moteur avant de vérifier le niveau de
carburant ou de faire le plein.
8-V-96
1. Utilisez l’équipement à l’extérieur dans des aires ouvertes et
bien ventilées.
2. Si vous utilisez ces équipements dans un endroit confiné, les
fumées d’échappement doivent être envoyées à l’extérieur, loin
des prises d’air du bâtiment.
2. Ne faites pas le plein en fumant ou proche d’une source
d’étincelles ou d’une flamme nue.
3. Si c’est possible, laissez le moteur refroidir avant de faire le
plein de carburant ou d’en vérifier le niveau au début du
soudage.
4. Ne faites pas le plein de carburant à ras bord: prévoyez de
l’espace pour son expansion.
5. Faites attention de ne pas renverser de carburant. Nettoyez tout
carburant renversé avant de faire démarrer le moteur.
2-3
PRECAUTIONS DE SECURITE EN SOUDAGE A L'ARC
Instruction 830002
DES PIECES EN MOUVEMENT PEUVENT CAUSER DES BLESSURES.
Des pièces en mouvement, tels des ventilateurs, des
rotors et des courroies peuvent couper doigts et
mains, ou accrocher des vêtements amples.
1. Assurez-vous que les portes, les panneaux, les capots et les
protecteurs soient bien fermés.
2. Avant d’installer ou de connecter un système, arrêtez le moteur.
DES ETINCELLES PEUVENT FAIRE EXP LOSER UN ACC UMU LATEUR;
L’ELECTROLYTE D’UN ACCUMULATEUR PEUT BRULER LA PEAU ET
LES YEUX.
Les accumulateurs contiennent de l’électrolyte
acide et dégagent des vapeurs explosives.
LA VAPEUR ET LE LIQUIDE DE REFROIDISSEMENT BRULANT SOUS
PRESSION PEUVENT BRULER LA
PEAU ET LES YEUX.
Le liquide de refroidissement d’un radiateur peut
être brûlant et sous pression.
3. Seules des personnes qualifiées doivent démonter des protecteurs ou des capots pour faire l’entretien ou le dépannage
nécessaire.
4. Pour empêcher un démarrage accidentel pendant l’entretien,
débranchez le câble d’accumulateur à la borne négative.
5. N’approchez pas les mains ou les cheveux de pièces en mouvement; elles peuvent aussi accrocher des vêtements amples
et des outils.
6. Réinstallez les capots ou les protecteurs et fermez les portes
après des travaux d’entretien et avant de faire démarrer le
moteur.
1. Portez toujours un écran facial en travaillant sur un accumulateur.
2. Arrêtez le moteur avant de connecter ou de déconnecter des
câbles d’accumulateur.
3. N’utilisez que des outils anti-étincelles pour travailler sur un
accumulateur.
4. N’utilisez pas une source de courant de soudage pour charger
un accumulateur ou survolter momentanément un véhicule.
5. Utilisez la polarité correcte (+ et –) de l’accumulateur.
1. N’ôtez pas le bouchon de radiateur tant que le moteur n’est pas
refroidi.
2. Mettez des gants et posez un torchon sur le bouchon pour l’ôter.
3. Laissez la pression s’échapper avant d’ôter complètement le
bouchon.
PRINCIPALES NORMES DE SECURITE
Safety in Welding and Cutting, norme ANSI Z49.1, American Welding
Society, 550 N.W. LeJeune Rd., Miami, FL 33128.
Safety and Health Standards, OSHA 29 CFR 1910, Superintendent
of Documents, U.S. Government Printing Office, Washington, D.C.
20402.
Safe Handling of Compressed Gases in Cylinders, document P-1,
Compressed Gas Association, 1235 Jefferson Davis Highway, Suite
501, Arlington, VA 22202.
Code for Safety in Welding and Cutting, norme CSA W117.2 Association canadienne de normalisation, Standards Sales, 276 Rexdale
Boulevard, Rexdale, Ontario, Canada M9W 1R3.
Recommended Safe Practices for the Preparation for Welding and
Cutting of Containers That Have Held Hazardous Substances, norme
AWS F4.1, American Welding Society, 550 N.W. LeJeune Rd.,
Miami, FL 33128.
Safe Practices for Occupation and Educational Eye and Face Protection, norme ANSI Z87.1, American National Standards Institute,
1430 Broadway, New York, NY 10018.
National Electrical Code, norme 70 NFPA, National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269.
Cutting and Welding Processes, norme 51B NFPA, National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
2-4
8-V-96
430429-177
DESCRIPTION OF EQUIPMENT
DESCRIPTION OF EQUIPMENT
Generator
Tabulated Data
The Mega-Arc 3525DD (MX-400DD) diesel engine-driven arc welding machine is a self-contained
unit, mounted on a welded steel frame. The unit is
covered by a sheet metal canopy, bolted directly to
the frame. The control panel is at the back (generator) end of the unit.
Generator:
Output, Auxiliary Power .... 3kVA, 115/230V AC
Output, Welding Generator .....................10 kW
Amperes, rated .................................250 Amps
The welding generator and auxiliary (exciter) generator revolving fields are mounted on a single
heavy-duty shaft, supported by a ball bearing at the
exciter end of the shaft, and by the engine coupling
at the other end.
Voltage, rated....................................... 40 Volts
The welding generator is 250 ampere, at 100%
duty, 3-phase, wye connected, rectified to DC
power by the output rectifier, and stabilized by the
stability reactor.
................................. Low Range
15 to 200 A
.................................High Range
30 to 400 A
The auxiliary generator is self-excited. The AC
voltage output furnishes 115-volt power to a diode
bridge rectifier which provides DC voltage for excitation of the auxiliary generator fields and welding
generator fields. It provides 115-volt and 230-volt
AC power to the receptacles on the Control Panel
for operation of small tools, lights, etc. See Tabulated Data for rated auxiliary power of your unit.
Voltage, open-circuit ................. (max.) 75 Volts
Duty Cycle, rated .....................................100%
Current Range —
Operating Speed....................See Engine Data
Engine:
Make and model .................... Deutz, F3L1011
.......................................... or Deutz, F3L1011F
Type ......................................... Industrial diesel
Displacement .................125 cu. in. (2049 cm3)
Brake horsepower.......... 29 BHP @ 1800 RPM
Engine
Oil sump capacity................ 6.3 quarts (6 liters)
(after initial filling)
The engine used in this unit is a Deutz, Model
F3L1011 or F3L1011F diesel engine. It is directly
coupled to the welding generator shaft by a flexible
coupling.
Fuel tank capacity —
............................ 17 gallons (U.S.) (64.4 liters)
Weight (dry) ..................... 480 pounds (116 kg)
Normal operating RPM .................... 1800 RPM
Identification
The welding generator unit has an identification
plate attached to the control panel on the left-hand
side. The unit is identified as to SPEC number, by
the dash (—) number which follows it.
The engine identification number is stamped into
a plate on the crankcase of the cylinder block. When
ordering spare parts, or communicating about this
machine, be sure to specify the engine serial
number, engine type, unit specification and serial
numbers. Left- and right-hand sides of the unit are
determined when facing the control panel. See Supplementary Materials for address for communicating or ordering engine parts.
May 21, 1997 Revised
Dimensions and Weight: (See Figure 4-1)
Width (doors closed) ......... 28 inches (711 mm)
Width (doors open) ......... 67 inches (1702 mm)
Length ............................ 52 inches (1308 mm)
Height (top of canopy) —
....................................... 40 inches (1016 mm)
Height (over lifting eye) —
.................................... 43.5 inches (1143 mm)
Weight (shipping) —
.......................... approx. 1492 pounds (677 kg)
3-1
430429-177
DESCRIPTION OF EQUIPMENT
Figure 3-1
Control Panel
Supplementary Materials
1. Broken belt on alternator/blower drive
A copy of the operation manual for Deutz F3L1011
or Deutz F3L1011F Diesel Engines is included with
each welding generator unit. Additional copies may
be obtained from the manufacturer. Order from:
2. Low oil pressure
Deutz Corporation
7585 Ponce de Leon Circle
Atlanta, Georgia 30340
U.S.A.
Engine Controls and Instruments
Ignition Switch — The diesel engine starting motor
is actuated by this switch, located in the lower
right-hand corner of the control panel.
Starting The Engine: Depress and hold the engine protection shutdown pushbutton while simultaneously placing the ignition switch in START
position. When engine starts, allow ignition switch
to return to RUN position, continuing to depress
shutdown pushbutton. Hold only momentarily with
engine running. Upon release, engine should continue to run. If engine protection light or alternator
light comes on and engine immediately stops, a
problem may exist with any of the following:
3-2
3. High oil temperature
Immediately rectify any of these problems prior to
any attempt at restarting.
Do NOT crank the engine for more than 30 seconds at a time, as this may cause the starting motor
to overheat. Allow starting motor to cool at least 2
minutes before attempting to start the engine again.
NOTE: Upon stopping the engine during
normal operation, be sure the ignition
switch remains in the OFF position. If
switch is accidentally placed in the run location with the engine stopped, the engine
protection light will continue to glow and
could run the charge down on the battery.
Throttle Control — This control will speed up the
engine by pulling OUT on the T-handle, and twisting
to lock in desired position. Handle MUST be pulled
out completely and locked to run engine at full
operating speed, approximately 1840 RPM, no
load.
May 21, 1997 Revised
430429-177
DESCRIPTION OF EQUIPMENT
Return the handle to the IN position to idle engine
speed down, approximately 1200 RPM, no load.
(Refer to NOTE under Auxiliary Power Receptacles.)
Engine Protection Light — Glows (red) to indicate
a broken alternator/blower belt, low oil pressure, or
high oil temperature.
Alternator Light — Glows when engine alternator
circuit is not charging the battery at sufficient level.
Welding Terminals — (See Figure 3-2) — The two
welding terminals are located on the Welding Output Panel, which is located on the left-hand side of
the unit (facing the control panel). See instructions
in Initial Preparation for Use located in the Installation chapter.
Auxiliary Power Receptacles — Duplex receptacles located on the Control Panel (see Figure 3-1)
furnish 3-kVA, 115-volt and 230-volt, 60-Hz power.
Fuel Gauge — Indicates level of fuel in fuel tank.
Hour Meter — Indicates run time on engine.
Generator Controls
Range Selector Switch — This toggle switch is
used to select either the low or high welding range,
as indicated on the Current Control.
NOTE: The output voltage will drop below
the rated volts when engine is in the idling
mode. Low voltage may damage electrical
equipment connected to the generator
through this receptacle.
Current Control — The welding current control is
located in the center of the control box door panel.
Turning knob clockwise will increase welding current, counterclockwise will decrease current.
Voltmeter (Optional) — Indicates open-circuit and
welding arc voltage, when supplied.
Ammeter (Optional) — Indicates welding current
being used to weld, when supplied.
Arc Force Ampere Control — Varies the short-circuit (welding arc) current and produces an increase
of amperage when arc length is shortened. Turning
this control clockwise increases arc force, counterclockwise decreases arc force. See Operation
chapter for details.
May 21, 1997 Revised
Figure 3-2
Weld Output Panel
3-3
430429-177
DESCRIPTION OF EQUIPMENT
Volt-Ampere Curve - Low Range Voltage
Volt-Ampere Curve - High Range Voltage
3-4
May 21, 1997 Revised
430429-177
INSTALLATION
INSTALLATION
General Engine Driven Welder
Installation
The frame of an engine driven welder is intended
to be a base to held the welder components together. This frame is not intended to be the primary
structure of a trailer or wagon. This welder is intended to be installed on a rigid, flat surface. This
surface must allow the weight of the welder to be
distributed evenly along the length of the welder
frame.
Never install any vibration isolation material (shock
mounts, etc.) beneath the welder frame. This could
defeat the engine/generator shock mounts and
cause abnormal vibration throughout the welder and
produce vibration related problems.
Before choosing an installation location, make
note of where the service items are located on the
welder (oil change/fill, battery, air filter, fuel fill, etc.)
Install the welder for best access to the important
service items. Allow sufficient room for cooling air
intake and exhaust.
If you are unsure about any installation consult the
factory.
Trailer Installation: Do not use the frame assembly of this welder as the frame of a trailer (do not
attach axles or tongues directly to this frame). When
a trailer is required, use only trailers with its own
support frame that has a gross weight rated to carry
the weight of the welder and any other components
mounted on the trailer. Be sure the trailer tires are
for use with trailers. The soft sidewall design used
in radial tires can cause vibration related problems.
Be sure welder frame and trailer frame are electrically bonded together.
Truck Bed Installation: When installing this
welder on the bed of a truck allow the welder to sit
flat on the bed, or a surface which completely contacts the bottom of the welder frame. Do not modify
the welder frame by cutting or otherwise damaging
it or the warranty may be voided. Bolt the welder
frame directly to the bed to secure it. Do not install
any vibration absorption device (shock mounts, etc)
between the welder and the truck bed. Be sure
welder frame and truck frame are electrically
bonded together.
Ground Installation: The welder will operate perfectly fine just sitting on the ground, with or without
May 21, 1997 Revised
the shipping skid. No special precautions are required.
Location
For best operating characteristics and longest unit
life, take care in selecting an installation site. Avoid
locations exposed to high humidity, dust, high ambient temperature, or corrosive fumes. Moisture can
condense on electrical components, causing corrosion or shorting of circuits. Dirt on components
helps retain this moisture and also increases wear
on moving parts.
Safety
Refer to additional installation instructions under
the Safety Warnings chapter included in this manual.
Indoor Installation
Adequate air circulation is needed at all times in
order to assure proper operation. Provide at least
24 inches (610 mm) of space at air intake end of unit
and air exhaust outlet at left side door. Make sure
that ventilator openings are not obstructed. Allow
ample space to open canopy doors on sides of the
unit (see Tabulated Data in Description of Equipment chapter for dimensions) for servicing, and
space at the control panel end of unit for operation.
If unit is to be operated inside a building, make
certain there is adequate ventilation to carry off
escaping exhaust fumes and to provide an ample
supply of oxygen.
Place unit so that exhaust fumes are carried out of
the building using the shortest exhaust pipe possible and one with the fewest possible number of
bends. Exhaust back pressure can seriously affect
engine efficiency.
All exhaust connections must be gastight.
Portable Installation
For portable use, the machine may be located
within 12 inches (305 mm) of a truck cab, panel, or
whatever, if it is to be operated in the open air.
The engine of the welding machine must be placed
at the tongue end of the portable mounting for
4-1
430429-177
INSTALLATION
proper balance. If leads, etc., are to be stored on the
unit, they must be forward of the axle to maintain
proper balance of loading on the tongue end of the
unit.
NOTE: The unit should be operated in as
near a normal horizontal position as possible and never at a tilt greater than 15° from
horizontal.
Initial Preparation For Use
CAUTION: A short circuit to rectifier is
created if a battery is installed with polarity reversed. Current can flow from
positive terminal of battery through
negative and positive rectifiers and into
heat sink. From heat sink a completed
circuit exists back to negative battery
terminal. Full battery voltage will be impressed on rectifiers, in the alternator.
The resulting high current will damage
rectifiers and/or wiring harness.
1. Open canopy doors on sides of engine.
CAUTION: The canopy doors may fall to
a closed position during operation of the
unit if it is resting on an inclined surface,
or for other reasons. Tie the doors to
each other, to lifting eye or fuel filler cap.
Failure to do so may result in injury to
operating personnel.
2. Inspect unit thoroughly to be sure it is in proper
working order. Check all fuel and wire connections
to be certain they are secure. Tighten any loose
screws, nuts, or bolts. Check closely for any damage which may have occurred in transit.
3. Remove all special tags from the machine, read
carefully and follow any special directions they may
carry. Keep tags with manual for future reference.
4. Make certain that all cooling air passages and
cooling fins are free from foreign matter. Use clean,
dry compressed air to blow dirt and dust out of
cooling passages and control cabinet, 25 psi (172
kPa) maximum pressure.
5. Attach battery cables to poles of battery as
indicated on wiring diagram. The negative (—) pole
should be grounded to the frame of the unit in a
secure manner.
WARNING: Connect proper battery cable clamp to the positive
(+) battery post first, then the
other cable clamp to the negative (—) post.
4-2
6. Fill fuel tank with grade of fuel recommended by
engine manufacturer. (Consult engine operation
manual.) Be sure fuel is free of WATER and other
foreign matter. Make sure air vent to fuel tank is
open. See Safety Warnings chapter included in this
manual for precautions necessary when filling the
tank.
7. Pull the dipstick and check the oil level in
crankcase. If it is necessary to add oil, fill to dipstick
mark with correct seasonal grade of quality detergent oil. See engine operator’s manual for recommended viscosity and temperature chart (unit is
shipped with SAE 10W30 oil installed).
8. After engine has been properly prepared for
use, start the engine, and allow it to idle for 30
minutes or so. Carefully check again for any leaks
or loose connections during this period.
9. Determine which welding polarity will be suitable
for the welding job to be done.
a. For STRAIGHT polarity (DCEN) attach ELECTRODE lead (leading to electrode holder) to the
NEGATIVE (—) terminal on the Terminal and Receptacle Panel. Attach the WORK lead (with clamp
on end) to POSITIVE (+) terminal.
b. For REVERSE polarity (DCEP) attach ELECTRODE lead (leading to electrode holder) to the
POSITIVE (+) terminal. Attach the WORK lead (with
clamp on end) to the NEGATIVE (—) terminal.
CAUTION: Do not change welding leads
while generator is running, as open-circuit voltage (80 volts) is furnished to the
terminals. Shut engine down to change
leads.
May 21, 1997 Revised
430429-177
INSTALLATION
10. Make sure that no loose bars, tools, parts, etc.,
are in or on any part of engine as they could cause
serious damage to or wreckage of engine or generator, or personal injury to anyone standing nearby.
11. Carefully read and follow “Operating Instructions” in your engine operator’s manual.
Welding Leads
Table 4-1 shows welding lead sizes recommended for various lengths of leads. The footage
shown includes complete welding circuit, both electrode and work leads.
TOTAL LENGTH OF LEAD CIRCUIT IN FEET (AND METERS)
(ELECTRODE LEAD PLUS WORK LEAD)
Welding
Current
Amperes
50 Feet
(15.2 M)
100 Feet
(30.5 M)
150 Feet
(45.7 M)
200 Feet
(61.0 M)
250 Feet
(76.2 M)
100
150
200
250
300
350
400
#4
#2
#1
#1/0
#2/0
#3/0
#4/0
#4
#2
#1
#1/0
#2/0
#3/0
#4/0
#2
#1
#1/0
#2/0
#3/0
#3/0
#4/0
#1
#1/0
#2/0
#3/0
#4/0
2 - #2/0
2 - #2/0
#1
#2/0
#3/0
#4/0
2 - #2/0
2 - #3/0
2 - #3/0
NOTE: Cable size shown is for 90°C (194°F) cable insulation, 30°C (86°F) ambient, and not over
4.5 volts cable drop.
Table 4-1 Suggested Copper Welding Lead Size Guide
Figure 4-1
May 21, 1997 Revised
Dimensions
4-3
430429-177
INSTALLATION
This page intentionally left blank.
4-4
May 21, 1997 Revised
430429-177
OPERATION
OPERATION
Prestarting Instructions
In all probability, the welding unit will be moved
from one location to another many times during its
lifetime of service. Therefore, reference to Initial
Preparation For Use located in Installation chapter
is suggested each time the unit is moved prior to
using it.
1. Check the supply of fuel and crankcase oil. See
Deutz F3L1011 or F3L1011F Operation Manual for
specifications.
2. Inspect the unit thoroughly to be sure it is in
proper working order. Check all fuel line and wire
connections to be certain they are secure. Tighten
any loose screws, nuts or bolts.
3. Wipe off the entire unit and clean the air passages, control box and hard-to-reach places with
compressed air not over 25 psi (172 kPa).
4. Make sure that no loose bars, tools, parts, etc.,
are in or on any part of the engine as they could
cause serious damage to the engine, generator, or
personal injury to anyone standing nearby.
5. If the unit is operated indoors, make sure that
an exhaust line is properly connected to the engine
exhaust system, and discharges out of doors. Avoid
short bends or reduction in line size in exhaust
pipes, and locate the unit so as to necessitate the
shortest possible exhaust line to insure the least
amount of back-pressure on the engine. Back-pressure can cause engine damage and loss of power.
6. Check welding leads. Attach welding leads, as
described under Initial Preparation For Use located
in Installation chapter. Observe Table 4-1 and determine that welding leads are proper size for amperage being used for welding.
Break-in Procedures
A proper break-in procedure for a new diesel engine-driven welding generator is extremely important to avoid future problems. Long periods of
operation at idle or light load condition may result in
cylinder wall “glazing” and resultant poor seating of
piston rings so that oil consumption will be excessive. Also, it may result in “wet stacking”, which is
unburned fuel that accumulates in the exhaust pipe
due to extremely low exhaust temperatures. The
following procedure will apply a load to the engine,
May 21, 1997 Revised
assuring the hot exhaust [at least 450°F (232°C)],
which will aid in preventing “wet stacking”.
1. Open the fuel shut-off valve at fuel tank.
2. Start the engine (see instructions under Engine
Controls and Instruments included in Description of
Equipment chapter) and let it run for a few minutes
to warm up lubricating and cooling oil, and then shut
the engine off.
3. Check engine for oil and fuel leaks or malfunctioning parts.
4. Start engine again. Operate unit with canopy
doors closed.
5. Apply a load to the welding generator. This can
be accomplished by attaching a proper resistance
load across the welding terminals and setting the
current control. The load should be equal to at least
200 amps at 40 volts.
6. Operate the engine-generator unit for approximately one hour under the above loading conditions.
NOTE: This procedure can be followed at
any time that wet-stacking becomes a problem, in order to burn out the unburned
hydrocarbons that accumulate in the exhaust stack.
Prewelding Instructions
To adjust weld current and arc characteristics
while welding, the High/Low Range Switch, Current
Control, and Arc Force Control can all be adjusted
under load, without damaging the welding machine.
However, caution should be used in switching from
low to high range on the Range Selector Switch, as
this would cause the welding current to be immediately doubled. This might be more than the electrode in use could stand. This would cause
immediate problems with the welding arc.
Note that on the Current Control dial, the low range
is just one-half of the high range values. For example, leaving the Current Control setting constant, the
high range would deliver 200 amperes, and the low
range 100 amperes. This relation holds consistent
through the entire range of the welding machine,
giving two widely overlapping current ranges.
The low range is 15 to 200 amperes, and the high
range is 30 to 400 amperes. The entire usable range
5-1
430429-177
OPERATION
of the machine for stick electrode (SMAW) welding
can be obtained in the single high range.
Adjustable Arc Force control for the welding process gives the operator great flexibility in selecting
the arc characteristics needed for a particular job.
(Refer to Volt-Amp Curves in Installation chapter.)
Setting the Arc Force Control at 4 to 6, or in the
FORCEFUL range will adjust the welding characteristics of the Mega-Arc 3525DD (MX-400DD) machine to be normal and similar to many of the
conventionally controlled engine-driven stick-electrode welding machines. However, turning down the
Arc Force Control to the 2 to 4, or SMOOTH range,
gives a softer, less “spatter” type of welding arc.
Setting the Arc Force Control to DIGGING, 6 to 10
range, gives a very forceful, driving arc, which
makes “sticking” the electrode nearly impossible.
Note on the Volt-Amp Curves that this adjustment
of arc characteristics is accomplished by changing
the short-circuit-to-welding current ratios as indicated by the dotted lines for arc force settings of 0,
2, 5, and 10 on the dial.
Welding
After all Prestarting and Break-In Procedures have
been carried out, the controls for using the generator for welding may be set and welding accomplished. Follow this procedure:
1. Start engine per instructions under Engine Controls and Instruments. Operate unit with canopy
doors closed.
2. Set Range Selector Switch on desired range
and adjust current control for desired current. Turning the current control clockwise increases the welding current and open-circuit voltage; while turning it
counterclockwise decreases the welding current.
3. Strike an arc and begin welding. If a change in
welding current is desired, increase by turning knob
clockwise until desired current is obtained. See
Prewelding Instructions above for details on current
range, current level, and arc force control.
Stopping The Engine
1. Stop welding.
2. Push throttle control handle in completely to
slow engine speed to idle.
NOTE: With optional idle system, place
speed control switch in LOW position.
5-2
3. Turn engine starting switch to OFF.
4. Allow engine to cool sufficiently, then check
crankcase oil level. If engine oil is to be changed, it
can be done most effectively while engine is still
warm.
5. After engine has cooled completely, fill the fuel
tank. See Safety Warnings chapter included in this
manual for precautions that should be taken when
filling the fuel tank.
Storage
Nightly — After operation, the following steps
should be taken before storing the welding machine
for short periods of time.
1. Clean up around working area. Put all tools,
parts and supplies in their proper places.
2. Disconnect welding leads from machine. Coil
them and stow away in their place.
3. If unit is to be stored outdoors, it is wise to cover
it with a tarpaulin.
Extensive Storage Time — If unit is to be laid-up
for some time, please refer to “Engine Preservation”
in Deutz Engine Operation Manual which is supplied with each unit.
Adverse Weather Precautions
Cold Weather Operation — Operation of enginedriven welding units at sub-zero temperatures requires special precautions and extra servicing from
both operation and maintenance personnel if poor
performance or total functional failure is to be
avoided. Consult Deutz Engine Operation Manual
and recommendations below.
a. Fuel System — Keep system clean and free
from water which may collect in a low spot in the fuel
line and freeze, plugging the line. Fuel tanks should
be kept FULL to prevent water condensation from
the air above the fuel. Check the filter bowl located
beneath the fuel tank outlet daily for presence of
water.
b. Fuel — Keep fuel storage tanks or drums as
full as possible to avoid condensation of moisture
from the air above the fuel. After filling or moving
fuel containers, allow fuel to settle before using.
Never draw fuel from the extreme bottom of the
container. Strain all fuel to remove any foreign
matter. When operating outdoors, take steps to
prevent the entry of snow, water and ice into the fuel
containers.
May 21, 1997 Revised
c. Lubrication — Drain the crankcase (preferably when warm after running) and fill with a lighter
grade of oil. See Engine Oil Recommendations
chart in the Deutz Engine Operation Manual for
recommended viscosity for various atmospheric
temperatures. In cold weather, drain oil more frequently. Water condenses and collects quickly,
mixes with the oil and increases deposits to form a
sludge. Check oil frequently for this condition. Water
in crankcase or oil lines may freeze and cause
serious damage to the oil pump, or shut off the oil
supply.
d. Battery — Battery efficiency decreases
sharply with lower temperatures. Maintain the specific gravity of the battery between 1.275 and 1.300
(fully charged condition). Make sure of full charge
before attempting to start engine in sub-zero conditions.
Operation In Hot And Humid Conditions
Battery — The specific gravity and proper level
of the battery electrolyte should be maintained.
Observe recommendations in the Deutz Engine
Operation Manual for proper care of the battery.
Operation In Extremely Dusty Conditions — If
unit is to be operated under dusty, out-of-door conditions, place in a sheltered area. Take advantage
of any natural barriers which may offer protection
from blowing dust. If the installation is more than
temporary, erect a protection shield. Be sure not to
block the air intake and exhaust outlets.
430429-177
OPERATION
oil filter cartridge as needed. Change or clean element in the air cleaner as required.
c. Crankcase — The crankcase oil level will
bear close attention. Dusty conditions tend to load
crankcase oil with dirt. Watch for dirty and gritty oil
conditions, and change oil more frequently as required.
Operation In Salt Water Areas
a. Canopy — Wash canopy regularly to remove
salt film. Repaint any damaged places and oil the
side panel hinges regularly.
b. Covering — To protect the engine and generator as much as possible from salt water atmosphere, keep the side panels on the canopy closed,
when not in use. It is advisable to keep the unit
covered with a tarpaulin, if available, while not in
operation. Salt water should be wiped from the
engine, and all terminals and connections in the
electrical system wiped dry. Keep all linkage oiled.
c. Brushes — The brushes of the welding generator and exciter should be inspected regularly to
make certain that they are free in the holders. Lift
the brushes in the brushholders about every two
days to insure their freedom to slide within the
holder. Wipe dry all the parts that can be reached,
and use compressed air, if available, to dry the parts
of the generator that cannot otherwise be reached.
See Maintenance chapter for brush and commutator care.
a. Fuel System — Drain the fuel water-trap
sediment bowl frequently, and keep all fuel containers covered and protected against dust entry.
d. Field Coils — The fields should be dried as
thoroughly as possible. If they have become damp,
proceed with recommended procedure in Maintenance chapter.
b. Oil Filter and Air Cleaner — These both need
more frequent attention under dusty conditions.
Check air Restrictor Indicator daily (located at air
cleaner outlet, ahead of hose connection). Change
e. Battery Terminals — Thoroughly clean the
battery terminals and connections. Coat terminals
and connections with petroleum jelly to retard corrosion.
May 21, 1997 Revised
5-3
430429-177
OPERATION
This page intentionally left blank.
5-4
May 21, 1997 Revised
430429-177
MAINTENANCE
MAINTENANCE
Engine And Related Components
NOTE: Check diesel engine operation
manual for all engine-related maintenance.
Inspection And Cleaning
Every Day, check for oil or fuel leaks. Also check
for loose electrical connections. Do not operate
engine if alternator light stays ON, which indicates
battery is not being fully charged. Wipe accumulated
water off all electrical connections and instruments.
Check air cleaner restriction indicator located on air
cleaner outlet ahead of hose. Check engine oil level.
Every Week, wipe accumulated dust, dirt, and oil
off from the engine and generator. Check all parts
for looseness and wear. If arcing has occurred at
any electrical connection, recondition it and securely refasten.
Every Month, blow out generator windings with
compressed air, not over 25 psi (172 kPa) pressure
or remove with a suction type cleaner with a nonmetallic nozzle. If windings should become slightly
damp, use space heaters or electric light bulbs to
effectively dry out the windings. If dampness is
excessive, apply external heat under a canvas
cover, well vented. Heating should not exceed
194°F (90°C).
2. Lift brush (D) from brushholder (C) for inspection. If brushes are worn unevenly or are shorter
than 7/16 inch (11 mm), replace them.
3. Inspect slip rings whenever brushes are removed for servicing brushes or brushholders. Note
surface condition of rings. Surface should appear
smooth and clean. Scoring or roughness of slip
rings may be caused by grit or abrasive substance
in brushes, or by oil on the rings. Moderately rough
slip rings can be smoothed by holding grade 00 flint
paper against their surface while the rings are revolving slowly. If the rings are badly scored, the unit
must be sent to an overhaul facility for repair. After
cleaning slip rings, blow dirt and grit out of the unit
with compressed air. Do not use over 25 psi (172
kPa) air pressure to blow dirt out.
4. Slip new brushes into brushholder guides, and
place caps on top, and screw them into the guides
to a “bottomed” position. The spring attached to the
brush will determine the pressure at which the brush
contacts the slip rings.
Pound out any dents in the canopy. Sand, prime,
or repaint any dented or rusted spots.
Lubrication
Engine — Consult Deutz Operation Manual.
Exciter/Auxiliary Brushes
(See Figure 6-1)
These operations can be more easily accomplished by removing the lower control panel and the
exciter cover.
1. Disconnect leads (A) from connectors on brushholder caps (B).
CAUTION: When removing the lead
wires, do so one at a time and replace
each brush accordingly, to insure that
the lead wires are put back onto the
proper brushes.
May 21, 1997 Revised
Figure 6-1 Exciter/Auxiliary Brushes
6-1
430429-177
MAINTENANCE
5. To fit new brushes to the slip rings, lay a strip of
No. 00 sandpaper, smooth side down, on slip ring
surface, and draw the sandpaper in the direction of
rotation of the slip rings, lifting the brush on the
return stroke. Continue until the brushes have the
same curvature as the slip rings. Blow all carbon
dust out of the machine using not over 25 psi (172
kPa) air pressure.
Failure To Build Up Voltage
Refer to Connection Diagram in Diagrams chapter
included in this manual.
One common problem with engine-driven generators is failure to build up voltage from loss of
residual magnetism in the fields.
Check all wiring from the exciter stator T1-T2 to
rectifier (CR1) and to slip rings (SR). Also check
(CR1) diode bridge for a shorted diode which would
Figure 6-2
6-2
not allow unit to build up. If this check does not solve
problem, check the revolving fields for continuity, as
explained below. See Figure 6-2.
NOTE: Rectifier CR1 is located on inside
surface of right side panel. Remove lower
control panel for access.
To check for revolving field coil problems, it is
necessary to understand that there are two field
circuits permanently paralleled at the slip ring connections. A good armature will show 6-ohms resistance measured at the slip rings (with brushes lifted
from rings). If the resistance measured at the rings
is 8 ohms, then the exciter revolving fields (23-ohm
coils) have an open circuit. If the measured resistance at the slip rings is 23 ohms, then the generator
fields (8 ohms) have an open circuit. A resistance
measurement of much less than 6 ohms at the slip
rings indicates that there is a short circuit somewhere in the revolving field windings.
Slip Ring Continuity
May 21, 1997 Revised
430429-177
TROUBLESHOOTING
TROUBLESHOOTING
The following chart contains information which can be used to diagnose and correct unsatisfactory operation or failure of the various components of the welding generator. Each symptom of trouble is followed by
a list of probable causes and the procedure necessary to correct the problem.
Troubleshooting Guide
Auxiliary Power Generator (Exciter) and Welding Generator
No output at Auxiliary Power Receptacles or Welding Terminals (Unit won’t build
up voltage).
Loose connections.
Check connections completely.
Open circuit in exciter revolving field.
Replace armature (see detail instructions at end of chart).
Brush and slip rings dirty.
Check brushes and clean slip rings.
Broken wiring.
Repair.
Shorted diode in field rectifier bridge.
Replace bridge.
No output at welding terminals (auxiliary power receptacles output OK).
Open circuit in welding generator revolving field coils.
Replace armature.
Shorted power diode SCR, or flyback diode in output rectifier assembly.
Replace defective device.
Fuses to control P.C. Board blown.
Replace fuses.
Control P.C. Board failure.
Replace P.C. Board.
Output voltage too high.
Engine overspeeding.
Check engine RPM; should read 1825-1840 (no load).
December 1, 1997 Revised
7-1
430429-177
TROUBLESHOOTING
Output voltage too low.
Engine running underspeed.
Check engine RPM.
One or more revolving field coils shorted.
Replace defective coils.
Engine
See Deutz Operation Manual for F3L1011 or F3L1011F
engine.
Detailed Troubleshooting
Instructions
The Mega-Arc 3525DD (MX-400DD) machines
are solid-state welding machines. The method of
troubleshooting is different, but it is not more difficult
than troubleshooting a conventional unit. Do not
overlook the obvious. As in the case of all electrical
equipment, loose connections are the primary
cause of malfunction both internal and external to
the power source. Do not overlook bad grounds,
shorted control cables, wrong settings, blown fuses,
misconnections from auxiliary equipment, misapplications, etc. The only equipment needed to properly
detect a problem on this power source is a simple
voltohmmeter, although an oscilloscope is the best
method to quickly “see” the problem.
Voltages — Refer to proper connection diagram.
See Diagram chapter included in this manual.
The following voltages should be read at 1800
RPM engine speed.
1. Welding Generator phase-to-phase, on all three
phases — 60 V AC ±10%.
2. Phase-to-Neutral of Welding Generator —
35 V AC ±10%.
3. Check for blown fuses F3-F8. Refer to Diagram
492107 included in the Diagrams chapter. Between
wires 13/7 brown, 14/8 orange, 15/9 grey, 16/10
black, 17/11 yellow, and 18/12 blue on fuse block
— 60 V AC ±10%.
NOTE: The ±10% value indicates the possibility of having a high or low engine RPM.
Malfunction In SCRs Or Diodes — The following
conditions will probably exist:
7-2
One SCR does not turn on (either it is open, or gate
signal is not being received by the SCR [gate circuit
open]) and a very small change will occur at the
welding arc, and will be difficult to detect by the
average welding operator. Generally when this happens, it will be necessary to adjust the current
control on the front of the power source (see Figure
3-1), increasing the current to obtain the same
welding current that was being produced before the
SCR defect occurred.
Open-Circuit Voltage Test
If the power source is suspected, a very simple
test can tell you a great deal about the power
source. Observe the open-circuit voltage of the
machine by placing a voltmeter across the output
terminals. The voltage reading should be approximately 75 V DC.
If the voltage is not equal or close to 75 V DC, there
is something wrong with the power source (welding
machine). Note that this voltage was observed at
normal engine speed (1800 RPM). It will vary according to the engine speed. If the 75 V DC is
observed, there is a very good chance that the
power source is operating properly.
NOTE: It is important to note that in the
LOW range (15 to 200 amperes) at minimum setting of the Current Control, the
open-circuit voltage will drop to a lower
value and vary slightly with the current control. This is not a malfunction, but a normal
situation.
Power Diode And SCR Testing
In case of a severe malfunction such as a shorted
SCR, do NOT turn the unit ON. Disconnect the
December 1, 1997 Revised
430429-177
TROUBLESHOOTING
leads from the generator to the rectifier assembly,
and check with a VOM for shorted SCRs and diodes.
An open gate or an open SCR cannot be checked
with a VOM. If an SCR is not firing, the open-circuit
voltage will shift down. Check the following table for
typical values for a Mega-Arc 3525DD (MX-400DD)
unit.
One Not Two Not
Firing
Firing
Three
Not
Firing
75 V DC 50 V DC 25 V DC
0 V DC
All
SCRs
Firing
Max
OCV
Turn the Current Control to maximum position
(fully clockwise) and begin disconnecting the white
leads from the harness, one at a time. As the first
lead is disconnected, observe the open-circuit voltage of the machine. If the OCV drops to a lower
value, it will indicate that this particular SCR is
working properly. Reconnect this lead, and proceed
to do the same with the remaining two leads until
you discover which disconnection does not cause
the OCV to drop to a lower level. This will be the
SCR which should be changed.
Printed Circuit Board Testing
Table 7-1
The next step is to check the Printed Circuit Board
inside the unit. See Figure 7-1 and Table 7-2 for
location of test points and voltage values at the test
points.
The following conditions indicate the possibility of
a defective P.C. Board:
NOTE: The above values in Table 7-1 were
recorded at normal engine RPM (1800).
1. Loss of welding arc completely.
2. Rough, sputtering arc, very noticeable.
Isolating Malfunctioning SCR
This can be done best by trial-and-error method.
Use proper diagram as reference while inspecting
the unit.
On the output rectifier heat sink there are three
SCRs, each having a small lead. The lead, a white
one, is connected to a wire harness providing the
gate signal to the SCRs.
December 1, 1997 Revised
3. Loss of welding arc control.
4. Difficulty in starting arc.
If any voltage measurement does not agree with
Table 7-2 voltage values, the P.C. Board is probably
defective.
NOTE: Do not attempt to repair or recalibrate these voltages, as they are factory
set.
7-3
430429-177
TROUBLESHOOTING
Figure 7-1
Control P.C. Board
TEST
1
2
3
4
5
6
7
TEST POINTS
TP-N to TP-E
TP-M to TP-E
TP-C to TP-E
TP-D to TP-E
TP-A to TP-E
TP-B to TP-E
TP-F to TP-E
TP-G to TP-E
TP-H to TP-E
CALLOUTS
2 to 13
14 to 13
3 to 13
12 to 13
4 to 13
11 to 13
5 to 13
7 to 13
9 to 13
VOLTAGE
+40.0/+21.0
–40.0/–21.0
+20.0
–20.0
+15.0
–15.0
+4.3
+4.3
+4.3
8
TP-J to TP-E
TP-K to TP-E
TP-L to TP-E
6 to 13
8 to 13
10 to 13
+18.3
+18.3
+18.3
CONDITIONS
1800 RPM/Idle
1800 RPM/Idle
1800 or Idle
1800 or Idle
1800 or Idle
1800 or Idle
1800 or Idle
1800 or Idle
1800 or Idle
1800 or Idle
1800 or Idle
1800 or Idle
REMARKS
No Load
No Load
No Load
No Load
No Load
No Load
No Load
No Load
No Load
No Load
No Load
No Load
Table 7-2
7-4
December 1, 1997 Revised
430429-177
PARTS LIST
PARTS LIST
Equipment Identification
All identification numbers as described in the Introduction chapter must be furnished when ordering
parts or making inquiries. This information is usually
found on the nameplate attached to the equipment.
Be sure to include any dash numbers following the
Specification or Assembly numbers.
How To Use This Parts List
The Parts List is a combination of an illustration
(Figure Number) and a corresponding list of parts
which contains a breakdown of the equipment into
assemblies, subassemblies, and detail parts. All
parts of the equipment are listed except for commercially available hardware, bulk items such as wire,
cable, sleeving, tubing, etc., and permanently attached items which are soldered, riveted, or welded
to another part. The part descriptions may be
indented to show part relationships.
To determine the part number, description, quantity, or application of an item, simply locate the item
in question from the illustration and refer to that
item number in the corresponding Parts List.
An “Application Code” is used to distinguish parts
that are applicable only to certain Specifications
and/or Assemblies. This code is found in the rightmost column of the Parts List. If an item in the Parts
List applies to all Specifications or Assemblies, the
word “ALL” will be in the Application Code column.
Refer to the following list to determine the appropriate Application Codes for the Specifications or
Assemblies covered by this manual. If only the
assembly or specification number is listed, the use
of an Application Code does not apply to this
manual.
SPEC NUMBER
APPLICATION CODE
500005-1
500005A-1
500005B-1
A
B
C
December 1, 1997 Revised
8-1
430429-177
PARTS LIST
Figure 8-1
8-2
Control Panel
May 21, 1997 Revised
430429-177
PARTS LIST
Parts List for Figure 8-1
Item
No
Part
Number
25
26
500005-1
500005A-1
500005B-1
494455
494455-1
404089
404473
407757-1
406004-1
79C-1149-1
494134-1
405982-1
407948
404856
402670
409527-3
492010-2
492010-8
492036
492036-1
406003-1
404915-1
491238
W-11166-9
405129-1
367579
406003-2
405157
491454
491454-1
491446
491446-1
402663
406806-1
406806-3
491773-1
491773-3
8BW-106A
406040
—
Not Illustrated
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
—
21
22
23
24
December 1, 1997 Revised
Description
Welding Machine - Diesel Powered
Welding Machine - Diesel Powered
Welding Machine - Diesel Powered
. Panel - Control, Upper
. Panel - Control, Upper
. Receptacle - Duplex, 3 Wire, 230 V
. Switch - Magnetic, 12 V DC
. . Fuse
. Light - Snap Mt., Red
. Meter - Hour
. Gauge - Fuel
. Cover - Meter Hole
. Rectifier - Isolated Base
. Switch - Toggle
. Receptacle - Duplex, 3 Wire 115 V
. Circuit Breaker
. Box - Control, Assembly
. Box - Control, Assembly
. . Box
. . Box
. . Strip - Terminal, 6 Station
. . Spacer - P.C. Board
. . Board - P.C. Control
. . Fuse - 1 Amp, Fast Blow
. . Block - Fuse, 6 Station
. . Insulator - Fuse Block
. . Strip - Term. 12 Station
. . Label - Fuse
. . Door - Control Box Assembly
. . Door - Control Box Assembly
. . . Door
. . . Door
. . . Nut - Pot. Lock
. . . Knob - Control
. . . Knob - Control
. . . Knob - Control
. . . Knob - Control
. . . Spacer
. . . Boot - Toggle Switch
Qty Application
per
Code
Assy
1
1
1
1
1
2
1
1
2
1
1
1
3
1
1
1
1
1
6
1
6
1
1
1
1
1
1
1
1
2
1
1
1
1
1
3
A
B
C
A
BC
All
All
All
All
All
All
All
All
All
All
All
A
BC
A
BC
All
All
All
All
All
All
All
All
A
BC
A
BC
All
A
BC
A
BC
All
All
8-3
430429-177
PARTS LIST
This page intentionally left blank.
8-4
May 21, 1997 Revised
430429-177
PARTS LIST
Parts List for Figure 8-1
Item
No
27
28
29
30
31
32
33
34
35
December 1, 1997 Revised
Part
Number
405365-1
367703-1
406926-1
492576
402682
400758
404875
494122
494122-1
DW-4333
Description
. . . Switch - Toggle
. . . Resistor - 1/2 Watt
. . . Potentiometer - 2 Watt, 5 K
. . . Board - Mtg. Pot.
. . . Switch - Toggle
. . . Receptacle - 6 Pin Amphenol
. . . Cap & Chain - Assembly
. Panel - Lower
. Panel - Lower
. Control - Throttle, Lock Type
Qty Application
per
Code
Assy
1
1
2
1
2
1
1
1
1
1
All
All
All
All
All
All
All
A
BC
All
8-5
430429-177
PARTS LIST
Figure 8-2
8-6
Frame Group
May 21, 1997 Revised
430429-177
PARTS LIST
Parts List for Figure 8-2
Item
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
December 1, 1997 Revised
Part
Number
Description
500005-1, 500005A-1, & 500005B-1
(Continued)
5J-260-0
. Cap - Bearing
5J-260-3
. Cap - Bearing
356773-38
. Housing - Exciter, Assembly
492183-1
. Cover - Exciter Housing
492183-2
. Cover - Exciter Housing
402037-9
. Grommet - Rubber
491463
. Bracket - Mtg. Brushholder
402531
. Cap - Brushholder
402788
. Brush
402530
. Guide - Brushholder
491897
. Armature
356773-42
. Housing - Gen. Assembly
491480
. Cover - Gen. Housing
491480-1
. Cover - Gen. Housing
351683
. Grommet
491658-3
. Coupling - Flex. W/Fan
494426
. Housing - Flywheel Assembly
491758-1
. Cover - Hole
491758-3
. Cover - Hole
No Number
. Flywheel - (Supplied W/Engine)
C-31
. Key - Coupling
494556
. Insulator - Brushholder
Qty Application
per
Code
Assy
1
1
1
1
1
1
1
2
2
2
1
1
1
1
2
1
1
1
1
1
1
1
A
BC
All
A
BC
All
All
All
All
All
All
All
A
BC
All
All
All
A
BC
All
All
All
8-7
430429-177
PARTS LIST
Figure 8-3
8-8
Fuel Lines and Rectifier Assembly
May 21, 1997 Revised
430429-177
PARTS LIST
Parts List for Figure 8-3
Item
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
December 1, 1997 Revised
Part
Number
Description
500005-1, 500005A-1, & 500005B-1
(Continued)
494133
. Cap - Fuel Tank
494130
. Grommet - Fuel Tank
405089
. Label - Fuel
406000
. Label - Warning
494445
. Label - Precautionary
409158
. Label - Danger, Lifting Eye
494444
. Top - Canopy
494444-1
. Top - Canopy
406650-2
. Hood - Air Cleaner
494454
. Hose - Air Cleaner
W-10869-6
. Clamp - Hose
W-10869-5
. Clamp - Hose
406768-1
. Indicator - Restriction
406927
. Cleaner - Air
406187
. Bracket - Mtg.
491414
. Reactor - Filter Assembly
494449
. Door - Side, Right
494449-1
. Door - Side, Right
494135-1
. Sender - Fuel Gauge
494127
. Tank - Fuel
494141
. Support - Fuel Tank
494141-1
. Support - Fuel Tank
491405
. Shield - Heat
491405-1
. Shield - Heat
491820
. Support - Heat Shield
491820-1
. Support - Heat Shield
406358-2
. Resistor - Fixed, 50 Ohm, 175 W.
492533-3
. Panel - Output Terminal
492533-6
. Panel - Output Terminal
492532-1
. . Panel
492532-2
. . Panel
5CW-975
. . Bushing
5CW-974
. . Bar - Bus
No Number
. . Nut - 1/2-13, HWH, ST.
5CW-976A
. . Washer - Insulating
No Number
. . Washer - 1/2, FL, ST.
No Number
. . Washer - 1/2, LK, ST.
368705-7
. . Capacitor - Assembly
Qty Application
per
Code
Assy
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
4
2
5
2
All
All
All
All
All
All
A
BC
All
All
All
All
All
All
All
All
A
BC
All
All
A
BC
A
BC
A
BC
All
A
BC
A
BC
All
All
All
All
All
All
All
8-9
430429-177
PARTS LIST
This page intentionally left blank.
8-10
May 21, 1997 Revised
430429-177
PARTS LIST
Parts List for Figure 8-3
Item
No
Part
Number
31
32
33
34
35
No Number
No Number
367687
No Number
494128
494128-1
409554-1
202258-5
367634A-4
492049
492047
494129
494129-1
494425
494425-1
406254-3
491799-1
491683-1
491683-2
494448
494448-1
490174
490040
490234
492244
406254-2
Ref.
494168
494168-1
494441
494441-1
494438
494438-1
494442
494442-1
492133-5
492132-2
494030
493797-2
494429
494429-1
36
36A
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
—
59
December 1, 1997 Revised
Description
. . Screw - #6-32 x 3/16 Rd. Hd. MH. ST.
. . Screw - 1/2-13 x 1-3/4, HHC., ST.
. . Shunt - Assembly
. . Screw - 1/2-13 x 1-1/2 HHC., ST.
. Panel - Side, Right
. Panel - Side, Right
. Rectifier
. Suppressor - W/Lugs
. Suppressor - Surge Assembly
. Bracket - Mtg. Bus
. Bar - Bus
. Panel - Side, Left
. Panel - Side, Left
. Frame - Mtg. Assembly
. Frame - Mtg. Assembly
. Mount - Shock
. Washer - Shock Mount
. Bar - Mtg. Gen.
. Bar - Mtg. Gen.
. Door - Side, Left
. Door - Side, Left
. Plate - Hinge
. Hinge - Door
. Latch - Door
. Handle - Door
. Mount - Shock
. Battery - 12 V, Group 24
. Clamp - Battery
. Clamp - Battery
. Panel - Side, Left Front
. Panel - Side, Left Front
. Panel - Front
. Panel - Front
. Panel - Side, Right, Front
. Panel - Side, Right, Front
. Cable - Battery, Positive
. Cable - Battery, Negative
. Boot - Terminal Solenoid
. Protector - Battery Term.
. Support - Eng. Left
. Support - Eng. Left
Qty Application
per
Code
Assy
2
All
2
All
1
All
1
All
1
A
1
BC
1
All
1
All
1
All
1
All
1
All
1
A
1
BC
1
A
1
BC
2
All
8
All
1
A
1
BC
1
A
1
BC
8
All
4
All
4
All
4
All
2
All
1
All
1
A
1
BC
1
A
1
BC
1
A
1
BC
1
A
1
BC
1
All
1
All
1
All
2
All
1
A
1
BC
8-11
430429-177
PARTS LIST
This page intentionally left blank.
8-12
May 21, 1997 Revised
430429-177
PARTS LIST
Parts List for Figure 8-3
Item
No
Part
Number
60
494430
494430-1
494412
494688-1
494688-2
800000
494446
494446-1
494424
404154-7
494458
494456
494456-1
402037-11
W-9360-59
494457
16DW-34
494541
Ref.
406001
W-9234-349
W-9234-299
494518
493457
61
62
63
64
65
66
67
68
69
70
71
72
73
—
—
—
—
74
—
December 1, 1997 Revised
Description
. Support - Eng. Right
. Support - Eng. Right
. Engine - Diesel, Deutz
. Support - Air Duct
. Support - Air Duct
. Support - Air Duct
. Duct - Exhaust Air
. Duct - Exhaust Air
. Manifold - Exhaust Muffler
. Clamp - Full Circle
. Pipe - Extension, Exhaust
. Yoke - Lifting
. Yoke - Lifting
. Grommet - Rubber
. Cable - 1/0 Assembly
. Pivot - Throttle
. Clamp - Throttle Wire
. Clamp - Throttle Cable
. Rectifier (For Details See Figure 8-4)
. Label - Moving Parts
. Cable - Output Term. to Rectifier
. Cable - Output Term. to Reactor
. Label - Filter Replacement
. Spacer - Door Latch
Qty Application
per
Code
Assy
1
A
1
BC
1
All
2
A
2
B
2
C
1
A
1
B
1
All
1
All
1
All
1
A
1
BC
1
All
1
All
1
All
1
All
1
All
Ref.
All
2
All
1
All
1
All
1
All
4
All
Not Illustrated
NOTE: Engine Oil Filter Replacement – Deutz P.N. 1174417
Engine Fuel Filter Replacement – Deutz P.N. 1174696
8-13
430429-177
PARTS LIST
Figure 8-4 Fuel Lines and Rectifier Assembly
8-14
May 21, 1997 Revised
430429-177
PARTS LIST
Parts List for Figure 8-4
Item
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
December 1, 1997 Revised
Part
Number
Description
500005-1, 500005A-1, & 500005B-1
(Continued)
Delete
491666-10
. Hose - Low Pressure 1/4 I.D. (24")
402927-2
. Connector - Hose
W-10869-14
. Clamp - Hose
355325-12
. Hose - Low Pressure, 5/16 I.D.
355325-16
. Hose - Low Pressure, 5/16 I.D.
402927-3
. Connector - Tube to Pipe
400504
. Filter
. Deleted
W-10750-2
. Nipple - Pipe, 1/8
12CW-2125
. Elbow - Street, 45°
492019
. Insulator - Diode Leads
355324-18
. Tubing - ST. 5/16 O.D., 1-13/16 Long
492026-1
. Plate - Rect. Left
494474
. Plate - Rect. Right
494459-2
. Spacer - Insulating
410223-9
. Spacer - Fiber
494459-6
. Spacer - Insulating
494459-1
. Spacer - Insulating .250" Long
W-10931-3
. Diode - Silicon, 275 A, Pos. Base
494475
. Rectifier - Silicon Controlled
400149-1
. Nut - Spring, Dished 3/4-16
Qty Application
per
Code
Assy
1
1
4
1
1
1
1
All
All
All
AB
C
All
All
1
1
1
3
1
1
3
3
3
3
4
3
7
All
All
All
All
All
All
All
All
All
All
All
All
All
8-15
430429-177
PARTS LIST
This page intentionally left blank.
8-16
May 21, 1997 Revised
430429-177
DIAGRAMS
DIAGRAMS
•
Note the model and specification number shown on the equipment nameplate.
•
Locate these numbers in the model and specification number columns below.
•
Use only those diagrams and instructions that are applicable.
MODEL
NUMBER
SPECIFICATION CONNECTION
NUMBER
DIAGRAM
CONTROL
BOX
ENGINE
DIAGRAM DIAGRAM
500005-1
494462
494699
494462
500005A-1
494462
494699
494462
500005B-1
494462A
494699
494462A
Mega-Arc 3525DD
(Mega-Arc MX-400DD)
May 21, 1997 Revised
REMOTE
LOCAL
REMOTE
LOCAL
STATEMENT OF WARRANTY
®
LIMITED WARRANTY: Thermal Arc , Inc., A Thermadyne Company, warrants that its products will be free of defects in workmanship
or material. Should any failure to conform to this warranty appear within the time period applicable to the Thermal Arc products as stated
below, Thermal Arc shall, upon notification thereof and substantiation that the product has been stored, installed, operated, and
maintained in accordance with Thermal Arc’s specifications, instructions, recommendations and recognized standard industry practice,
and not subject to misuse, repair, neglect, alteration, or accident, correct such defects by suitable repair or replacement, at Thermal
Arc’s sole option, of any components or parts of the product determined by Thermal Arc to be defective.
THERMAL ARC MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF
ALL OTHERS, INCLUDING, BUT NOT LIMITED TO ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR PURPOSE.
LIMITATION OF LIABILITY: Thermal Arc shall not under any circumstances be liable for special or consequential damages, such as,
but not limited to, damage or loss of purchased or replacement goods, or claims of customers of distributor (hereinafter “Purchaser”)
for service interruption. The remedies of the Purchaser set forth herein are exclusive and the liability of Thermal Arc with respect to any
contract, or anything done in connection therewith such as the performance or breach thereof, or from the manufacture, sale, delivery,
resale, or use of any goods covered by or furnished by Thermal Arc whether arising out of contract, negligence, strike tort, or under
any warranty, or otherwise, shall not, except as expressly provided herein, exceed the price of the goods upon which such liability is
based. No employee, agent, or representative of Thermal Arc is authorized to change this warranty in any way or grant any other
warranty.
PURCHASER’S RIGHTS UNDER THIS WARRANTY ARE VOID IF REPLACEMENT PARTS OR ACCESSORIES ARE USED WHICH
IN THERMAL ARC’S SOLE JUDGMENT MAY IMPAIR THE SAFETY OR PERFORMANCE OF ANY THERMAL ARC PRODUCT.
PURCHASER’S RIGHTS UNDER THIS WARRANTY ARE VOID IF THE PRODUCT IS SOLD TO PURCHASER BY
NON-AUTHORIZED PERSONS.
Except with regards to the products listed below, this warranty shall remain effective three (3) years from the date Thermal Arc’s
authorized distributor delivers the product to Purchaser, but in no event more than (4) years from the date Thermal Arc delivers the
product to the authorized distributor.
Shorter warranty periods apply to the products listed below. On these products, the warranty is effective for the time stated below
beginning on the date that the authorized distributor delivers the products to the Purchaser. Notwithstanding the foregoing, in no event
shall the warranty period extend more than the time stated plus one year from the date Thermal Arc delivered the product to the
authorized distributor.
ALL OTHER
P-WEE, PRO-LITE
POWER SUPPLIES
POWER SUPPLIES
PRO-PLUS, PRO-WAVE
LABOR
MAIN POWER MAGNETICS (STATIC & ROTATING)
3 YEARS
2 YEARS
1 YEAR
ORIGINAL MAIN POWER RECTIFIER
3 YEARS
2 YEARS
1 YEAR
CONTROL PC BOARD
3 YEARS
2 YEARS
1 YEAR
ALL OTHER CIRCUITS AND COMPONENTS INCLUDING
1 YEAR
1 YEAR
1 YEAR
BUT NOT LIMITED TO, CONTACTORS, RELAYS,
SOLENOID, PUMPS, POWER SWITCHING SEMI-CONDUCTORS
ENGINES: ENGINES ARE NOT WARRANTED BY THERMAL ARC, ALTHOUGH MOST ARE WARRANTED BY THE ENGINE
MANUFACTURER. SEE THE ENGINE MANUFACTURES WARRANTY FOR DETAILS.
CONSOLES, CONTROL EQUIPMENT, HEAT
1 YEAR
1 YEAR
1 YEAR
EXCHANGES, AND ACCESSORY EQUIPMENT
TORCH AND LEADS
180 DAYS
180 DAYS
180 DAYS
REPAIR/REPLACEMENT PARTS
90 DAYS
90 DAYS
90 DAYS
®
Warranty repairs or replacement claims under this limited warranty must be submitted to Thermal Arc by an authorized Thermal Arc repair
facility within thirty (30) days of the repair. No transportation costs of any kind will be paid under this warranty. Transportation charges to
send products to an authorized warranty repair facility shall be the responsibility of the customer. All returned goods shall be at the customer’s
risk and expense. This warranty supersedes all previous Thermal Arc warranties.
®
Thermal Arc is a Registered Trademark of Thermadyne Industries Inc.
Thermal Arc Inc.
Troy, Ohio 45373
Effective January 4, 1999
830538
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising