AUTO ARC MW 4150 User manual

AUTO
ARC}~
April
1990
FORM: OM-113
336C
Effective
W
Ith
Serial
No
.
KA792557
MODEL: AUTO
ARC
MW 4150
AUTO
ARC
MW
4200
spW1
OWNERS
MANUAL
IMPORTANT:
Read
and
understand the
entire
contents
of this
manual,
with
special
emphasis
on
the
safety
material
throughout
the
manual,
before
MILLER
ELECTRIC
Mfg.
Co.
AM~IIerGroupLtd..Con~any
Installing,
operating,
or
maintaining
thIs
equipment.
This unit and these
Instructions
are
for
use
only by
persons
trained
and
experienced
In
the safe
P0 Box
1079
A~!eton.
WI
54912 USA
operation
of
welding equipment.
Do
not
allow untrained
persons
to
install,
Tel.
414-734-9821
operate,
or
maintain this unit.
Contact
your
distributor
if
you
do
not
fully
understand
these
Instructions.
PRINTED
IN
U.S.A

ONE
YEAR LIMITED
WARRANTY
EFFECTIVE: FEBRUARY
17,
1989
This
warranty
supersedes
all
previous
AUTOARC
warranties
and is
exclusive with
no
otherguarantees
orwarranties
expressed
or
implied.
COVERAGE
-
MILLER Electhc
Mfg.
Co.
warrants
to the
buyer
who
purchases
this AUTO ARC Welder
(~Welder)
for
personal,
family
or
household
purposes
(Consumer)
that
this
Welder
will be free
from defects in material
and
workmanship
for
a
period
of
one
year
from the date
of
purchase.
This
warranty
covers
only
the
original
purchaser
of
this Welder. MILLER Elec
tric
does
not
authorize
any
party,
including
its authorized dis
tributors,
to
offer
any
other
warranty
on
behalf
of
MILLER Elec
tric.
Upon
expiration
of
the
warranty
period,
MILLER
Electric
shall
have
no
further
liability
related
to
the
Welder,
except
on
warranty
claims made
during
the
warranty
period.
No
warranty
is
made
by
MILLER with
respect
to
engines,
trade
accessories
orotheritems manufactured
byothers.
Such
engines,
trade
ac
cessories
and
other
items
are
sold
subject
to
the
warranties
of
their
respective
manufacturers,
if
any.
All
engines
are war
ranted
by
their manufacturer
for
two
years from
date
of
original
purchase,
except
Deutz
engines
which
have
a one
year,
2000
hour
warranty.
MILLER shall
be
required
to honor
warranty
claims
on war
ranted
Equipment
in
the
event
of
failure
resulting
from
a
defect
within the
following
periods
from the
date of
delivery
of
Equip
ment
to the
original
user:
1.
Arc
welders,
power
sources,
and
components
...
1
year
2.
original
main
power
rectifiers
3
years
(labor

1
year
only)
3.
All
welding
guns,
feeder/guns
and
torches
90
days
4.
Replacement
or
repair
parts,
exclusive
of
labor
.
60
days
5.
Batteries
6
months
provided
that
MILLER is
notified in
writing
within
thirty
(30)
days
of
such failure.
WHAT IS
NOT COVERED
This
warranty
does
not
extend
to
any
Welder
subjected
to
misuse,
neglect,
ac~dent,
or
in-
warranty
repair
by
anyone
except
MILLER
Electric
or
its
autho
rized
service stations.
Further,
this
warranty
only
extends
to
the
original
purchaser
of
this Welder.
In the
case
of
MILLERs
breach of
warranty
or
any
other
duty
with
respect
to the
quality
of
any
goods,
the
exclusive
remedies
therefore shall
be,
at MILLERs
option
(1) repair
or
(2) replace-
mentor,
where
authorized
in
writing
by
MILLER
in
appropriate
cases,
(3)
the reasonable
cost
of
repair
or
replacement
at
an
authorized
MILLER
service
station
or
(4)
payment
of
or
credit
for
the
purchase
price (less
reasonable
depreciation
based
upon
actual
use)
upon
return
of the
goods
at
Consumers
risk
and
expense.
MILLERs
option
of
repair
or
replacement
will
be
FOB.,
Factory
at
Appleton,
WI
or
FOB.
at
a
MILLER autho
rized
service
facility,
therefore,
no
compensation
for
transporta
tion
costs
of
any
kind will be allowed.
Upon
receipt
of
notice
of
apparentdefectorfailure,
MlLLERshallinstructtheclaimanton
the
warranty
claim
procedures
to
be
followed.
THIS WARRANTY
IS
OFFERED
IN
LIEU
OF ANY
OTHER
EXPRESS
WARRANTY;
AND,
EXCEPT
TO
THE EXTENT
PROHIBITED
BY
APPLICABLE
LAW,
THE DURATION
OF
ALL
IMPLIED
WARRANTIES,
INCLUDING BUT
NOT
LIMITED TO THE IMPLIED WARRANTIES
OF
MERCHAN
TABILITY
AND FITNESS
FORA PARTICULAR
PURPOSE,
IS
LIMITED
TO
THE DURATION OF
THIS WARRANTY.
ANY
EXPRESS WARRANTY
NOT
PROVIDED
HEREIN
AND
ANY
IMPLIED
WARRANTY,
GUARANTY
OR REPRE
SENTATION
AS
TO
PERFORMANCE,
AND
ANY
REMEDY
FOR
BREACH OF CONTRACT
WHICH,
BUT
FOR THIS
PROVISION,
MIGHT
ARISE BY
IMPLICATION,
OPERATION
OF
LAW,
CUSTOM
OF TRADE OR
COURSE
OF
DEALING,
INCLUDING
ANY
IMPLIED WARRANTY
OF MERCHANT
ABIUTY OR OF
FITNESS FOR PARTICULAR
PURPOSE,
WITH
RESPECT
TO ANY
AND
ALL
EQUIPMENT
FUR
NISHED BY
MILLER
IS
EXCLUDED
AND
DISCLAIMED
BY
MILLER.
Some
states
do
not
allow
limitations
on
how
long
an
implied
warranty
lasts,
so
the above limitation
may
not
apply
to
you.
This
warranty
gives
you
specific
legal
rights,
and
you
may
also
have
other
rights
which
vary
from
state to state.
THE
PURCHASERS
REMEDIES
FOR A
DEFECTIVE
WELDER,
TO
THE EXTENT
PERMITIED
BY
APPLICABLE
LAW,
ARE LIMITED TO THE REMEDY
PROVIDED
BY
THIS
WARRANTY.
TO
THE EXTENT
ENFORCEABLE
UNDER
APPLICABLE
LAW,
MILLER
ELECTRIC
SHALL
IN NO
EVENT BE
LIABLE FOR
CONSEQUENTIAL,
INCIDENTAL
ORSPECIALDAMAGESARISINGOUTOFTHE
USEOF,OR
INABILITY TO
USE,
THE
WELDER,
WHETHER
BASED ON
BREACH OF THIS
WARRANTV~
MILLER ELECTRICS
NEG
LIGENCE OR
OTHER
TORT,
OR
ON ANY THEORY
OF
STRICT
LIABIUTY.

ERRATA
SHEET
After
this
manual
was
printed,
refinements
in
equipment design
occurred.
This
sheet
lists
exceptions
to
data
appearing
later in
this manual.
AMEN
DMENT
TO SECTION 11

PARTS LIST

Amend
Parts List
as
Follows:
Dia. Part
Mkgs.
No.
Replaced
With
Description
Quantity
45-1
SRi
089733
+137 914
RECTIFIER/WINDTUNNEL,
(Effw/KA898364)
(MW
4150
model)
(consisting
of)
1
45-1
SRi
087660
+137 913
RECTIFIER/WINDTUNNEL,
(Effw/KA898364)
(MW
4200
model)
(consisting
of)
1
45-7
057 496 137 912
BRACKET,
mtg
fan
motor
(Eff
wIKA898367)
(MW
4150
model)
1
45-7 081 678 137 912
.
BRACKET,
mtg
fan
motor
(Eff
w/KA898367)
(MW
4200
model)
1
45-9 125 947
134
982
PANEL,
rear
(Eff w/KA898364)
(MW
4150
model)
1
47-15
Si
090 328
124
511
SWITCH,
tgl
DPST
40A 600VAC
1
**First
digit
represents
page
no

digits
following
dash
represent
item
no.
+All
items remain
the
same
unless
listed.
BE
SURE
TO PROVIDE
MODEL
AND
SERIAL
NUMBER
WHEN
ORDERING REPLACEMENT PARTS.

OM-113336C-4190
RECEIVING-HANDLING
Beforeunpackingequipment, checkcartonforanydam-
Use the
following
spaces
to
record the Model
Designa
age
that
may
have occurred
during shipment.
File
any
tion and
Serial
or
Style
Number
of
your
unit. The infor
claims for loss
or
damage
with
the
delivering
carrier. mation
is
located
on
the data card
or
the
nameplate.
Assistance
for
filing
or
settling
claims
may
be
obtained
from
the distnbutor and/or the
equipment
manufactur-
Model
_______________________________
ers
Transportation Department.
Serial
or
Style
No.____________________
When
requesting
information about this
equipment,
al
ways
provide
the
Model
Description
and Serial
or
Style
Date
of
Purchase
____________________
Number.
TABLE OF
CONTENTS
Section
No.
Page
No.
SECTION
1

SAFETY RULES FOR
OPERATION
OF ARC WELDING POWER
SOURCE
1-1.
Introduction
1
1-2.
General
Precautions
1
1-3.
Arc
Welding
3
1-4.
Standards
Booklet Index
5
SECTION
2
SAFETY
PRECAUTIONS
AND
SIGNAL WORDS
2-1.
General
information And
Safety
6
2-2.
Safety
Alert
Symbol
And
Signal
Words
6
SECTION
3
INTRODUCTION
3-1.
Volt-Ampere
Curves
8
3-2.
Duty
Cycle
8
3-3.
Description
8
3-4.
Supplied
Equipment
8
3-5.
Additional
Required Equipment
9
3-6.
Optional
Equipment
10
3-7.
Consumable
Parts
10
SECTION
4
INSTALLATION
4-1.
Site Selection
10
4-2.
Transporting
Methods
10
4-3.
Running
Gear
installation
11
4-4.
Optional
SPW-1
Panel
Installation
11
4-5.
Shielding
Gas
Installation
12
4-6. Work
Cable
Assembly
13
4-7.
Weld
Polarity
Selection
14
4-8.
MWG-200
Welding
Gun
Connections
14
4-9.
Installation
Of
Optional
Spool
Gun
15
4-10.
Welding
Wire
Spool
Installation
16
4-11.
Hub Tension
Adjustment 16
4-12.
Electrical
Input
Connections
16
4-13.
Welding
Wire
Threading
17

Section
No.
Page
No.
SECTION
5-
OPERATOR
CONTROLS
5-1.
Power
Switch
And
Pilot
Light
19
5-2.
ThicknessNolts
Selector
19
5-3.
Fine
Tuning/Wire
Speed
Control
19
5-4.
Fan-On-Demand
19
5-5.
Optional
Spot
Pulse
Panel
Controls
19
SECTION
6-
SEQUENCE
OF
OPERATION
6-1.
Gas
Metal
Arc
Welding
(GMAW)-Continuous
And
Gas
Metal
Arc
Welding-Pulsed
Arc
(GMAW-P)
20
6-2.
Gas Metal
Arc
Welding
(GMAW)-Spot
(Models
With
Optional
SPW-1 Panel
Only)
22
6-3.
Shutting
Down
23
SECTION
7-
MAINTENANCE
&
TROUBLESHOOTING
7-1.
Routine
Maintenance
23
7-2.
Replacing
Drive Roll
And
Wire
Inlet
Guide
24
7-3.
Drive
Housing
Realignment
26
7-4.
Replacing
Hub
Assembly
26
7-5.
Inspecting
And
Replacing
Motor
Brushes
26
7-6.
Overload
Protection
27
7-7.
Thermal
Overload Protection
27
7-8. Printed Circuit Board
Replacement
27
7-9.
Troubleshooting
27
SECTION
8-
ELECTRICAL
DIAGRAMS
Diagram
8-1.
Circuit
Diagram
For
MW4150 Models
30
Diagram
8-2.
Circuit
Diagram
For MW4200 Models 30
Diagram
8-3.
Circuit
Diagram
For
SPW-1
Panel 31
SECTION 9WELDING TECHNIQUES
&
TROUBLESHOOTING
9-1.
Gas
Metal
Arc
Welding
(GMAW)-Continuous
Seam
32
9-2.
Gas Metal Arc
Welding
(GMAW)-Pulsed
33
9-3.
Gas Metal
Arc
Welding
(GMAW)-Spot
34
9-4.
Plug
Welds
35
9-5.
Skip
Welding
35
9-6.
Troubleshooting
The
Gas
Metal Arc
Welding
Process
35
SECTION
10-
AUTO
BODY REPAIR
APPLICATION
10-1.
Pointers
For
Welding
Auto
Body
Sheet
Metal
38
10-2.
Procedure For
Welding
Mild
Steels
38
10-3. Procedures
For
Welding
Door Panels
38
10-4. How To
Prevent
Glass
Breakage
And
Spatter
On
Windows
39
10-5.
Procedures
For
Welding
Fenders And Quarter
Panels
39
10-6.
Welding
Frames And
High
Strength
(HSS)
Steels
39

Section
No.
Page
No.
SECTION
11

PARTS
LIST
Figure
11-1.
Main
Assembly
40
Figure
11-2.
Baffle,
Air
w/Components
42
Figure
11-3.
Drive
Assembly,
Wire
44
Figure
11-4.
Panel,
Rear
w/Components
45
Figure
11-5.
Panel,
Front
w/Components
46
Figure
11-6.
SPW
1
Spot
Panel
(Optional)
48
Figure
11-7.
Circuit
Card,
PC5O
49
Figure
11-8.
Running
Gear
50
LIST OF
CHARTS
AND
TABLES
Table
3-1.
Specifications
7
Chart
3-1.
Volt-Ampere
Curves
7
Chart
3-2.
Duty
Cycle
7
Table
3-2.
Input
Conductor
And
Fuse
Size
17
Table
6-1.
Suggested
Parameters For
Continuous Gas
Metal
Arc
Welding
(GMAW)
21
Table
6-2.
Checking
Weld
Parameters
23
Table
7-1.
Maintenance
Schedule
23
Table
7-2.
Troubleshooting
28

SECTION 1

SAFETY RULES FOR
OPERATION OF ARC
WELDING
POWER
SOURCE
1-1. INTRODUCTION
We
learn
by
experience. Learning
safety
through
per
sonai
experience,
like
a
child
touching
a
hot
stove
is
harmful, wasteful,
and unwise.
Let
the
experience
of
oth
ers
teach
you.
Safe
practices
developed
from
experience
in
the
use
of
welding
and
cutting
are
described
in
this manual Re
search,
development,
and field
experience
have
evolved reliable
equipment
and
safe
installation,
opera
tion,
and
servicing
practices.
Accidents
occur
when
equipment
is
improperly
used
or
maintained.
The
rea
son
for
the
safe
practices
may
not
always
be
given.
Some
are
based
on
common
sense,
others
may
require
technical volumes
to
explain.
it
is
wiser
to
follow the
rules.
Read
and
understand these safe
practices
before
at
tempting
to
install,
operate,
or
service
the
equipment.
Comply
with these
procedures
as
applicable
to
the
par
ticular
equipment
used and theirinstruction
manuals,
for
personal safety
and
for
the
safety
of others.
Failure
to
observe these safe
practices
may
cause
seri
ous
injury
or
death.
When
safety
becomes
a
habit,
the
equipment
can
be used
with
confidence.
These
safe
practices
are
divided
into
two
Sections:
1-General
Precautions,
common
to
arc
welding
and
cut
ting;
and 2-Arc
Welding (and
Cutting)
(only).
Reference standards:
Published
Standards
on
safety
are
also available
for
additional
and
more
complete
pro
cedures
than those
given
in
this
manual.
They
are
listed
in
the
Standards
Index
in
this
manual.
ANSI
Z49.
1
is the
most
complete.
The National
Electrical
Code,
Occupational
Safety
and
Health
Administration,
local industrial
codes,
and local
inspection
requirements
also
provide
a
basis
for
equip
ment
installation,
use,
and service.
1-2.
GENERAL
PRECAUTIONS
Different
arc
weldIng
processes,
electrode
alloys,
and
fluxes
can
produce
different
fumes,
gases,
and
radiation
levels.
In
addition
to
the
Information
In
this
manual,
be
sure
to
consult
flux
and electrode
manu
facturers
MaterIal
Safety
Data Sheets
(MSDSs)
for
specific
technical
data and
precautionary
measures
concerning
their
material.
A.
Burn
Prevention
Wear
protective
clothing-gauntlet
gloves
designed
for
use
in
welding,
hat,
and
high
safety-toe
shoes.
Button
shirt collar
and
pocket
flaps,
and
wear
cuffless
trousers
to
avoid
entry
of
sparks
and
slag.
Wear
helmet
with
safety
goggles
and
glasses
with
side
shields
underneath,
appropriate
filter
lenses
or
plates
(protected
by
clear
cover
glass).
This
is
a
MUST
for
welding
or
cutting, (and
chipping)
to
protect
the
eyes
from
radiant
energy
and
flying
metal.
Replace
cover
glass
when
broken,
pitted,
or
spattered.
See
1
-3A.2.
Avoid
oily
or
greasy
clothing.
A
spark
may
ignite
them.
Hot
metal
such
as
electrode
stubs
and
workpieces
should
never
be
handled without
gloves.
Medical first
aid and
eye
treatment.
First aid facilities
and
a
qualified
first aid
person
should be
available
for
each
shift
unless medical facilities
are
close
by
for
immediate
treatment
of flash
burns of
the
eyes
and
skin
burns.
Ear
plugs
should
be
worn
when
working
on
overhead
or
in
a
confined
space.
A
hard hat
should be
worn
when
others
work
overhead.
Flammable hair
preparations
should
not
be used
by
per
sons
intending
to
weld
or
cut.
B.
Toxic
Fume Prevention
Severe
discomfort,
illness
or
death
can
result from
fumes,
vapors,
heat,
or
oxygen
enrichment
or
depletion
that
welding (or cutting)
may
produce.
Prevent
them
with
adequate
ventilation
as
described
in ANSI
Standard
Z49.1
listed
in
Standards
index.
NEVER
ventilate with
oxygen.
Lead
-,
cadmium-, zinc-,
mercury
-,and
beryllium-bear
ing
and similar
materials,
when
welded
(or
cut)
may pro
duce
harmful
concentrations
of
toxic
fumes.
Adequate
local
exhaust
ventilation
must
be
used,
or
each
person
in
the
area as
well
as
the
operator
must
wear an
air-sup
plied
respirator.
For
beryllium,
both
must
be
used.
Metals
coated with
orcontaining
materials
that
emit
toxic
fumes
should
not
be
heated
unless
coating
is
removed
from
the work
surface,
the
area
is well
ventilated
and,
if
necessary,
while
wearing
an
air-supplied
respirator.
Work
in
a
confined
space
only
while
it
is
being
ventilated
and,
if
necessary,
while
wearing
an
air-supplied
respira
tor.
Gas
leaks
in
a
confined
space
should
be
avoided.
Leaked
gas
in
large
quantities
can
change
oxygen
con
centration
dangerously.
Do
not
bring
gas
cylinders
into
a
confined
space.
Leaving
confined
space,
shut
OFF
gas
supply
at
source
to
prevent
possible
accumulation of
gases
in
the
space
it
downstream
valves have
been
accidentally
opened
or
left
open.
Check
to
be
sure
that
the
space
is
safe
before
re-entering
it.
Vapors
from chlorinated
solvents
can
be
decomposed
by
the heat of
the
arc
(or
flame)
to
form
PHOSGENE,
a
highly
toxic
gas,
and
other
lung
and
eye
irritating
prod
ucts.
The
ultraviolet
(radiant)
energy
of the
arc
can
also
decompose
trichioroethylene
and
perchloroethylene
vapors
to
form
phosgene.
DO
NOT
WELD
or cut
where
solvent
vapors
can
be drawn
into
the
welding
or
cutting
atmosphere
or
where
the
radiant
energy
can
penetrate
113336
Page
1

to
atmospheres
containing
even
minute
amounts
of
trichloroethylene
or
perchloroethyiene.
C.
Fire and
Explosion
Prevention
Causes
of fire
and
explosion
are:
combustibles reached
by
the
arc,
flame,
flying
sparks,
hot
slag
or
heated
mate
rial;
misuse of
compressed
gases
and
cylinders;
and
short circuits.
BE AWARE THAT
flying sparks
or
falling
slag
can
pass
through
cracks,
along pipes, through
windows
or
doors,
and
through
wail
or
floor
openings,
out
of
sight
of
the
goggled
operator.
Sparks
and
slag
can
fly
35
feet.
To
prevent
fires and
explosion:
Keep
equipment
clean and
operable,
free of
oil,
grease,
and
(in
electrical
parts)
of metallic
particles
that
can
cause
short
circuits.
If combustibles
are
in
area,
do
NOT
weld
or
cut.
Move
the
work
if
practicable,
to
an area
free
of
combustibles.
Avoid
paint
spray
rooms,
dip
tanks,
storage
areas,
venti
lators.
If
the
work
cannot
be
moved,
move
combustibles
at
least
35 feet
away
out
of reach
of
sparks
and
heat;
or
protect
against
ignition
with
suitable
and
snug-fitting,
fire-resistant
covers or
shields.
Wails
touching
combustibles
on
opposite
sides should
not
be
welded
on
(or cut).
Walls,
ceilings,
and
floor
near
work should
be
protected
by
heat-resistant
covers
or
shields.
Fire watcher
must
be
standing
by
with
suitable fire extin
guishing equipment
during
and for
some
time afterweld
ing
or
cutting
if:
a.
appreciable
combustibles
(including building
construction)
are
within
35 feet
b.
appreciable
combustibles
are
further
than
35
feet but
can
be
ignited by
sparks
c.
openings (concealed
orvisibie)
in
floors
orwalls
within 35 feet
may expose
combustibles to
sparks
d.
combustibles
adjacent
to
walls,
ceilings,
roofs,
or
metal
partitions
can
be
ignited
by
radiant
or
conducted
heat.
Hot work
permit
should
be
obtained before
operation
to
ensure
supervisors
approval
that
adequate
precautions
have been
taken.
After work
is
done,
check
that
area
is
free
of
sparks,
glowing
embers,
and
flames.
An
empty
container
that held
combustibles,
or
that
can
produce
flammable
or
toxic
vapors
when
heated,
must
never
be welded
on
or
cut,
unless
container has
first
been cleaned
as
described
in
AWS
Standard
A6.O,
listed
7 in
Standards
Index.
This
includes:
athoroughsteamorcausticcleaning(ora
solvent
or
water
washing, depending
on
the
combusti
bles
solubility)
followed
by
purging
and
inerting
with
ni
trogen
or
carbon
dioxide,
and
using protective
equip-
ment
as
recommended
in
A6.O.
Watertilling
just
below
working
level
may
substitute
for
inerting.
A container with unknown
contents
should
be
cleaned
(see preceding
paragraph).
Do
NOT
depend
on sense
of
smell
or
sight
to
determine
if
it is safe
to
weld
or
cut.
Hollow
castings
or
containers
must
be
vented before
welding
or
cutting.
They
can
explode.
Explosive atmospheres.
Never weld
or
cut
where
the
air
may
contain flammable
dust,
gas,
or
liquid
vapors
(such
as
gasoline).
D.
Compressed
Gas
Equipment
Standard
precautions.
Comply
with
precautions
in
this
manual,
and those detailed
in
CGA Standard
P-i,
SAFE
HANDLING OF
COMPRESSED GASES
IN
CYLIN
DERS,
listed
ii
in
Standards
Index.
1.
Pressure
Regulators
Regulator
relief
valve is
designed
to
protect
only
the
regulatorfromoverpressure;
itis
not
intended
to
protect
any
downstream
equipment.
Provide such
protection
with
one or more
relief devices.
Never
connect
a
regulator
to
a
cylinder
containing
gas
other
than that
for
which the
regulator
was
designed.
Remove
faulty regulatorfrom
service
immediately
for
re
pair
(first
close
cylinder
valve).
The
following
symptoms
indicate
a
faulty
regulator:
Leaks-if
gas
leaks
externally.
Excessive
Creep-if delivery
pressure
continues
to
rise
with downstream
valve
closed.
Faulty
Gauge-if
gauge
pointer
does
not
move
off
stop
pin
when
pressurized,
nor
returns
to
stop
pin
after
pressure
release.
Repair.
Do
NOT
attempt
to
repair.
Send
faulty
regulators
for
repair
to
manufacturers
designated
repair
center,
where
special
techniques
and
tools
are
used
by
trained
personnel.
2.
Cylinders
Cylinders
must
be
handled
carefully
to
prevent
leaks
and
damage
to
their
walls,
valves,
or
safety
devices:
Avoid
electrical circuit
contact
with
cylinders
including
third
rails,
electrical
wires,
or
welding
circuits.
They
can
produce
short
circuit
arcs
that
may
lead
to
a
serious acci
dent.
(See
1-3G.)
ICC
or
DOT
marking
must
be
on
each
cylinder.
It
is
an
assurance
of
safety
when
the
cylinder
is
properly
han
dled.
Identifying
gas
content.
Use
only cylinders
with
name
of
gas
marked
on
them;
do
not
rely
on
color
to
identify
gas
content.
Notify
supplier
if
unmarked.
NEVER
DEFACE
or
alter
name,
number,
or
other
markings
on
a
cylinder.
It
is
illegal
and
hazardous.
Empties:
Keep
valves
closed,
replace
caps
securely;
mark
MT;
keep
them
separate
from
FULLS
and
return
promptly.
113
336
Page
2

Prohibited
use.
Never
use
a
cylinder
or
its
contents
for
other
than
its
intended
use,
NEVER
as
a
support
or
roller.
Locate
or
secure
cylinders
so
they
cannot
be
khocked
over.
Passageways
and
work
areas.
Keep
cylinders
clear
of
areas
where
they
may
be
struck.
Transporting
cylinders.
With
a
crane,
use
a
secure
sup
port
such
as
a
platform
or
cradle. Do
NOT
lift
cylinders
off
the
ground
by
their
valves
or
caps,
or
by
chains,
slings,
or
magnets.
Do
NOT
expose
cylinders
to
excessive
heat,
sparks,
slag,
and
flame,
etc.
that
may
cause
rupture.
Do
not
al
low contents
to
exceed
130F.
Cool
with
water
spray
where
such
exposure
exists.
Protect
cylinders particularly
valves from
bumps,
falls,
falling
objects,
and weather.
Replace
caps
securely
when
moving cylinders.
Stuck
valve.
Do
NOT
use
a
hammer
orwrench
to
open
a
cylinder
valve that
can
not
be
opened
by
hand.
Notify
your
supplier.
Mixing
gases.
Never
try
to
mix
any gases
in
a
cylinder.
Never
refill
any
cylinder.
Cylinder
fittings
should
never
be
modified
or
exchanged.
3.
Hose
Prohibited
use.
Never
use
hose otherthan that
designed
for
the
specified
gas.
A
general
hose
identification rule
is: red for
fuel
gas, green
for
oxygen,
and
black for
inert
gases.
Use
ferrules
or
clamps
designed
for
the hose
(not
ordi
nary
wire
or
other
substitute)
as
a
binding
to connect
hoses
to
fittings.
No
copper
tubing splices.
Use
only
standard
brass
fit
tings
to
splice
hose.
Avoid
long
runs
to
prevent
kinks and abuse.
Suspend
hose
off
ground
to
keep
it from
being
run
over,
stepped
on,
or
otherwise
damaged.
Coil
excess
hose
to
prevent
kinks and
tangles.
Protect
hose from
damage by
sharp
edges,
and
by
sparks,
slag,
and
open
flame.
Examine
hose
regularly
for
leaks,
wear,
and loose
con
nections.
Immerse
pressured
hose
in
water;
bubbles
in
dicate
leaks.
Repair
leaky
or worn
hose
by
cutting
area
out
and
splic
ing
(1-2D3).
Do NOT
tape.
4.
Proper
Connections
Clean
cylinder
valve
outlet of
impurities
that
may
clog
orifices
and
damage
seats
before
connecting
regulator.
Except
for
hydrogen,
crack
valve
momentarily,
pointing
outlet
away
from
people
and
sources
of
ignition. Wipe
with
a
clean
lintless
cloth.
Match
regulator
to
cylinder.
Before
connecting,
check
that
the
regulator
label
and
cylinder marking
area,
and
thatthe
regulatorinlet
and
cylinderoutlet
match. NEVER
CONNECT
a
regulator
designed
for
a
particular
gas
or
gases
to
a
cylinder containing
any
other
gas.
Tighten
connections. When
assembling
threaded
con
nections,
clean
and
smooth
seats
where
necessary.
Tighten.
If
connection
leaks,
disassemble,
clean,
and
retighten using properly
fitting
wrench.
Adapters.
Use
a
CGA
adapter
(available
from
your
sup
plier)
between
cylinder
and
regulator,
if
one
is
required.
use
twowrenches
to
tighten
adapter
marked
RIGHT
and
LEFT HAND threads.
Regulatoroutlet (or
hose)
connections
may
be
identified
by right
hand
threads
for
oxygen
and left hand threads
(with grooved
hex
on
nut
or
shank)
for
fuel
gas.
5.
Pressurizing
Steps:
Drain
regulator
of
residual
gas
through
suitable
vent
be
fore
opening
cylinder
(or
manifold
valve) by turning
ad
justing
screw
in
(clockwise). Draining
prevents
exces
sive
compression
heat
at
high
pressure
seat
by allowing
seat
to
open
on
pressurization.
Leave
adjusting
screw
engaged
slightly
on
single-stage
regulators.
Stand
to
side
of
regulator
while
opening
cylinder
valve.
Open cylinder
valve
slowly
so
that
regulator
pressure
in
creases
slowly.
When
gauge
is
pressurized
(gauge
reaches
regulator
maximum)
leave
cylinder
valve
in
fol
lowing
position:
For
oxygen,
and inert
gases,
open
fully
to
seal
stem
against
possible
leak.
For
fuel
gas, open
to
less
than
one
turn
to
permit
quick
emergency
shutoff.
Use
pressure
charts
(available
from
your
supplier)
for
safe
and
efficient,
recommended
pressure
settings
on
regulators.
Check
for leaks
on
first
pressurization
and
regularly
there-after.
Brush
with
soap
solution
(capfuli
of
Ivory
Liq
uid*
or
equivalent
per
gallon
of
water).
Bubbles
indicate
leak.
Clean
off
soapy
water
after
test;
dried
soap
is
com
bustible.
E.
User
Responsibilities
Remove
leaky
or
defective
equipment
from
service im
mediately
for
repair.
See
User
Responsibility
statement
in
equipment
manual.
F.
Leaving Equipment
Unattended
Close
gas
supply
at
source
and drain
gas.
G.
Rope Staging-Support
Rope
staging-support
should
not
be
used for welding
or
cutting
operation;
rope
may
burn.
*Trademark
of
Proctor
&
Gamble.
1-3.
ARC
WELDING
113
336
Page
3

Comply
with
precautions
in
1-1, 1-2,
and this
section.
Arc
Welding,
properly
done,
is
a
safe
process,
but
a
careless
operator
invites
trouble. The
equipment
carries
high
currents
at
significant
voltages.
The
arc
is
very
bright
and hot.
Sparks
fly,
fumes
rise,
uttraviolet and
in
frared
energy
radiates,
weidments
are
hot,
and
com
pressed
gases may
be used.
The wise
operator
avoids
unnecessary
risks
and
protects
himself
and others from
accidents.
Precautions
are
described here and
in
stan
dards
referenced
in
index.
A. Burn
Protection
Comply
with
precautions
in 1-2.
The
welding
arc
is
intense and
visibly bright.
Its
radiation
can
damage
eyes,
penetrate
lightweight clothing,
reflect
from
light-colored
surfaces,
and
burn the
skin and
eyes.
Skin
burns
resemble
acute
sunburn,
those from
gas-
shielded
arcs are more severe
and
painful.
DONT
GET
BURNED;
COMPLY
WITH
PRECAUTIONS.
1.
Protective
Clothing
Wear
long-sleeve clothing
(particularly
for
gas-shielded
arc)
in
addition
to
gloves,
hat,
and shoes
(1
-2A).
As
nec
essary,
use
additional
protective
clothing
such
as
leather
jacket
or
sleeves,
flame-proof
apron,
and
f
ire-re
sistant
leggings.
Avoid
outer
garments
of
untreated
cot
ton.
Bare skin
protection.
Wear
dark,
substantial
clothing.
Button
collar
to
protect
chest and neck
and
button
pock
ets to
prevent
entry
of
sparks.
2.
Eye
and Head Protection
Protect
eyes
from
exposure
to
arc.
NEVER
look
at
an
electric
arc
without
protection.
Welding
helmet
or
shield
containing
a
filter
plate
shade
no.
12
or
denser
must
be
used
when
welding.
Place
over
face before
striking
arc.
Protect
filter
plate
with
a
clear
cover
plate.
Cracked
or
broken helmet
or
shield
should
NOT
be
worn;
radiation
can
pass
through
to
cause
burns.
Cracked,
broken,
or
loose
filter
plates
must
be
replaced
IMMEDIATELY.
Replace
clear
cover
plate
when
broken,
pitted,
or
spattered.
Flash
goggles
with
side shields
MUST
be
worn
under
the
helmet
to
give
some
protection
to
the
eyes
should
the
helmet
not
be
lowered
over
the
face before
an
arc
is
struck.
Looking
at
an
arc
momentarily
with
unprotected
eyes
(particularly
a
high
intensity
gas-shielded
arc)
can
cause
a
retinal
burn
that
may
leave
a
permanent
dark
area
in
the
field
of
vision.
3.
Protection
of
Nearby
Personnel
Enclosed
welding
area.
For
production
welding,
a
sepa
rate
room or enclosed
bay
is
best.
In
open
areas,
sur
round
the
operation
with
low-reflective,
non-combusti
ble
screens
or
panels.
Allow
for
free
air
circulation,
par
ticularly
at
floor level.
Viewing
the weld. Provide face shields for all
persons
who
will
be
looking directly
at
the
weld.
Others
working
in
area.
See that all
persons
are
wearing
flash
goggles.
Before
starting
to
weld,
make
sure
that
screen
flaps
or
bay
doors
are
closed.
B. Toxic
Fume
PreventIon
Comply
with
precautions
in
1-2B.
Generator
engine
exhaust
must
be
vented
to
the outside
air. Carbon
monoxide
can
kill.
C.
Fire and
Explosion
Prevention
Comply
with
precautions
in
1
-2C.
Equipments
rated
capacity.
Do
not
overload
arcweiding
equipment.
It
may
overheat
cables
and
cause
a
fire.
Loose
cable
connections
may
overheat
or
flash and
cause a
fire.
Never strike
an
arc
on
a
cylinder
or
other
pressure
ves
sel.
It
creates
a
brittle
area
that
can cause a
violent
rup
ture
or
lead
to
such
a
rupture
under
rough handling.
D.
Compressed
Gas
Equipment
Comply
with
precautions
in
1-2D.
E.
Shock
Prevention
Exposed
hot
conductors
or
other bare
metal
in
the
weld
ing
circuit,
or
in
ungrounded,
electrically-HOT
equip
ment
can
fatally
shock
a
person
whose
body
becomes
a
conductor.
DO
NOT
STAND,
SIT,
LIE,
LEAN
ON,
OR
TOUCH
a
wet
surface
when
welding,
without suitable
protection.
To
protect
against
shock:
Wear
dr, insulating
gloves
and
body
protection.
Keep
body
and
clothing
dry.
Never
work
in
damp
area
without
adequate
insulation
against
electrical shock.
Stay
on
a
dry
duckboard,
or
rubber
mat
when
dampness
or
sweat
can
not
be
avoided.
Sweat,
sea
water,
or
moisture
be
tween
body
and
an
electrically
HOT
part
or
grounded
metal
reduces
the electrical
resistance,
and could
en
able
dangerous
and
possibly
lethal
currents to
flow
through
the
body.
A
voltage
will
exist
between
the
electrode
and
any
con
ducting
object
in
the
work circuit.
Examples
of
conduct
ing
objects
include,
but
are
not
limited
to,
buildings,
elec
trical
tools,
work
benches,
welding
power
source
cases,
workpieces,
etc.
Never
touch the
electrode
and
any
metal
object
unless
the
welding
power
source
Is
off.
1.
Grounding
the
Equipment
Arc
welding equipment
must
be
grounded
according
to
the National
Electrical
Code,
and
the
work
must be
grounded
according
to
ANSI
Z49.1
Safety
In
Welding
And
Cutting.
When
installing,
connect
the
frames
of each
unit
such
as
welding
power
source,
control,
work
table,
and
water
cir
culatorto
the
building
ground.
Conductors
must
be
ade
quate
to
carry
ground
currents
safely.
Equipment
made
113336
Page4

electrically
HOT
by
stray
current
may
shock,
possibly
fa
tally.
Do
NOT GROUND
to
electrical
conduit,
orto
a
pipe
carrying
ANY
gas
or
flammable
liquid
such
as
oil
or
fuel.
Three-phase
connection.
Check
phase
requirements of
equipment
before
installing.
If
only
3-phase
power
is
available,
connect
single-phase
equipment
to
only
two
wires
of
the
3-phase
line. Do
NOT
connect
the
equip
ment
ground
lead
to
the
third
(live)
wire,
or
the
equip
ment
will become
electrically
HOT-a
dangerous
condi
tion
that
can
shock,
possibly
fatally.
Before
welding,
check
ground
for
continuity.
Be
sure
conductors are
touching
bare
metal
of
equipment
frames
at
connections.
If
a
line
cord
with
a
ground
lead
is
provided
with
the
equipment
for
connection
to
a
switchbox,
connect
the
ground
lead
to
the
grounded
switchbox.
If
a
three-prong
plug
is
added
for
connection
to
a
grounded
mating
re
ceptacle,
the
ground
lead
must
be
connected
to
the
ground
prong
only.
If
the
line
cord
comes
with
a
three-
prong
plug,
connect
to
a
grounded
mating
receptacle.
Never
remove
the
ground
prong
from
a
plug,
or
use a
plug
with
a
broken
off
ground
prong.
2. Electrode
Holders
Fully
insulated
electrode
holders
should be
used.
Do
NOT
use
holders
with
protruding
screws.
3.
Connectors
Fully
insulated
lock-type
connectors
should
be used
to
join
welding
cable
lengths.
4.
Cables
Frequently
inspect
cables
forwear,
cracks
and
damage.
IMMEDIATELY
REPLACE
those
with
excessively
worn
or
damaged
insulation
to
avoid
possibly-lethal
shock
from
bared cable.
Cables
with
damaged
areas
may
be
taped
to
give
resistance
equivalent
to
original
cable.
Keep
cable
dry,
free
of oil and
grease,
and
protected
from hot
metal and
sparks.
5. Terminals And
Other
Exposed
Parts
Terminals and
other
exposed
parts
of electrical units
should have
insulating
covers
secured before
operation.
6.
Electrode
a.
Equipment
with
output
on/off control
(contactor)
Welding
power
sources
for
use
with
the
gas
metal
arc
welding
(GMAW),
gas
tungsten
arc
welding
(GTAW)
and
similar
processes
nor
mally
are
equipped
with devices that
permit
on
off control of the
welding
power
output.
When
so
equipped
the electrode wire becomes
electri
cally
HOT
when the
power
source
switch is ON
and the
welding
gun
switch is closed. Never
touch the electrode wire
or
any
conducting
ob
ject
in
contact
with the electrode circuit unless
the
welding
power
source
is off.
b.
Equipment
without
output
on/off control
(no
contacto
r)
Welding
power
sources
used
with shielded
metal
arc
welding
(SMAW)
and
similar
proc
esses
may
not
be
equipped
with
welding
power
output
on-off
control
devices.
With such
equip
ment
the
electrode
is
electrically
HOT when
the
power
switch is
turned
ON.
Never
touch
the
electrode
unless
the
welding
power
source
is
off.
7. Safety
Devices
Safety
devices
such
as
interlocks
and circuit
breakers
should
not
be
disconnected
or
shunted
out.
Before
installation,
inspection,
or
service, of
equipment,
shut
OFF
all
power
and
remove
line
fuses
(or
lock
or
red-
tag
switches)
to
prevent
accidental
turning
ON
of
power.
Disconnect
all
cables
from
welding
power
source,
and
pull
all
115 volts
line-cord
plugs.
Do
not
open power
circuit
or
change
polarity
while
weld
ing.
If,
in
an
emergency,
it
must
be
disconnected,
guard
against
shock
burns,
or
flash from
switch
arcing.
Leaving
equipment
unattended.
Always
shut
OFF and
disconnect
all
power
to
equipment.
Power
disconnect
switch
must
be
available
near
the
welding
power
source.
F.
ProtectIon
For
Wearers
of
Electronic
Life
Sup
port
Devices
(Pacemakers)
Magnetic
fields from
high
currents
can
affect
pacemaker
operation.
Persons
wearing
electronic
life
support
equipment
(pacemaker)
should
consult
with their doctor
before
going
near arc
welding,
gouging,
or
spot
welding
operations.
1-4. STANDARDS
BOOKLET
INDEX
For
more
information,
ref
er
to
the
following
standards
or
their latest
revisions
and
comply
as
applicable:
1. ANSI Standard
Z49.1,
SAFETY
IN
WELDING
AND
CUTTING obtainable
from the
American
Welding
Society,
550
N.W.
LeJeune
Rd, Miami,
FL
33126.
2.
NIOSH,
SAFETY
AND
HEALTH
IN
ARC WELDING
AND
GAS
WELDING
AND
CUTTING
obtainable
from
the
Superintendent
of
Documents,
U.S. Gov
ernment
Printing
Office,
Washington,
D.C.
20402.
3.
OSHA,
SAFETY
AND HEALTH
STANDARDS,
29CFR
1910,
obtainable
from the
Superintendent
of
Documents,
U.S. Government
Printing
Office,
Washington,
D.C.
20402.
4. ANSI Standard
Z87.1,
SAFE PRACTICES FOR
OCCUPATION
AND
EDUCATIONAL
EYE AND
FACE PROTECTION
obtainable
from
the American
National
Standards
Institute,
1430
Broadway,
New
York,
NY
10018.
5.
ANSi Standard
Z41.1,
STANDARD
FOR~MENS
SAFETY-TOE FOOTWEAR
obtainable
from the
American National
Standards
Institute,
1430
Broad
way,
New
York,
NY
10018.
6.
ANSI Standard
Z49.2,
FIRE
PREVENTION
IN THE
USE OF CUTTING
AND
WELDING
PROCESSES
113336
Page5

obtainable
from the
American National
Standards
Institute,
1430
Broadway,
New
York,
NY
10018.
7.
AWS
Standard
A6.0,
WELDING
AND
CUTTING
CONTAINERS
WHICH
HAVE HELD
COMBUS
TIBLES obtainable
from the American
Welding
So
ciety,
550
N.W. LeJeune
Rd,
Miami,
FL
33126.
8.
NFPA Standard
51,
OXYGEN-FUEL
GAS SYS
TEMS FOR
WELDING,
CUTTING,
AND
ALLIED
PROCESSES
obtainable
from
the
National
Fire
Protection
Association,
Batterymarch
Park,
Quincy,
MA
02269.
9.
NFPA
Standard
70,
NATIONAL
ELECTRICAL
CODE
obtainable
from
the National Fire
Protection
Association,
Batterymarch
Park,
Quincy,
MA
02269.
10.
NFPA
Standard
51B,
CUTTING
AND
WELDING
PROCESSES
obtainable
from the
National Fire
Protection
Association,
Batterymarch
Park,
Qui
ncy,
MA
02269.
11.
CGA
Pamphlet
P-i,
SAFE HANDLING OF COM
PRESSED
GASES
IN
CYLINDERS
obtainable
fromthe
Compressed
Gas
Association,
1235
Jeffer
son
Davis
Highway,
Suite
501,
Arlington,
VA
22202.
12.
CSA
Standard
W117.2,
CODE
FOR
SAFETY
IN
WELDING AND
CUTTING obtainable
from
the
Ca
nadian
Standards
Association,
Standards
Sales,
178
Rexdale
Boulevard, Rexdale, Ontario,
Canada
M9W
1R3.
13.
NWSA
booklet,
WELDING
SAFETY
BIBLIOGRA
PHY
obtainable
from
the National
Welding Supply
Association,
1900
Arch
Street,
Philadelphia,
PA
19103.
14.
American
Welding
Society
Standard
AWSF4.i,
RECOMMENDED
SAFE PRACTICES
FOR
THE
PREPARATION FOR WELDING
AND
CUTTING
OF
CONTAINERS
AND
PIPING
THAT
HAVE
HELD
HAZARDOUS
SUBSTANCES,
obtainable
from the
American
Welding
Society,
550
N.W.
LeJeune
Rd,
Miami,
FL
33126.
15.
ANSI
Standard
Z88.2,
PRACTICE
FOR
RESPIRA
TORY
PROTECTION,
obtainable
from the
Ameri
can
National
Standards
Institute,
1430
Broadway,
New
York,
NY
10018.
SECTION
2-
SAFETY PRECAUTIONS AND SIGNAL WORDS
2-1.
GENERAL
INFORMATION
AND
SAFETY
A. General
Information
presented
in
this
manual and
on
various la
bels,
tags,
and
plates
on
the
unit
pertains
to
equipment
design,
installation,
operation,
maintenance,
and
troubleshooting
which should be
read,
understood,
and
followed for the safe
and effective
use
of
this
equipment.
The
nameplate
of this
unit
uses
international
symbols
for
labeling
the
front
panel
controls.
The
symbols
also
ap
pear
at
the
appropriate
section
in
the
text.
B
Safety
The
installation,
operation,
maintenance,
and trouble
shooting
of
arc
welding equipment requires
practices
and
procedures
which
ensure
personal
safety
and
the
safety
of
others.
Therefore,
this
equipment
is
to
be
in
stalled,
operated,
and
maintained
only
by qualified
per
sons
in
accordance
with this
manual and all
applicable
codes
such
as,
but
not limited
to,
those listed
at
the
end
of
Section
1

Safety
Rules For
Operation
Of
Arc Weld
ing
Power
Source.
2-2.
SAFETY
ALERT
SYMBOL
AND
SIGNAL
WORDS
The
following
safety
alert
symbol
and
signal
words
are
used
throughout
this manual
to
call attention
to
and iden
tify
different levels
of hazard
and
special
instructions.
a
This
safety
alert
symbol
is
used
with
the
signal
words
WARNING
and
CAUTION
to
call
atten
tion
to
the
safety
statements.
a
a
WARNING
statements
identify
procedures
or
practices
which
must
be followed
to
avoid
seri
ous
personal injury
or
loss
of
life.
CAUTION
statements
identify
procedures
or
practices
which
must
be
followed
to
avoid
minor
personal
injury
or
damage
to
this
equipment.
IMPORTANT
statements
identify
special
instructions
necessary
for the
most
efficient
operation
of
this
equip
ment.
113336
Page
6

SECTION
3INTRODUCTION
Table
3-1.
Specifications
Rated
Weld
Output
At 60%
Duty
Cycle
Max.
Open-
Circuit
Voltage
Input
At Rated
Load
Output
60
Hz
Single-Phase
kw
Control
Circuit
Voltage
At Gun
Electrode
Wire
Feed
Speed
Electrode
Wire
Diameter
Capability
Amperes
At
kva
200V 230V 460V 575V
150
Amperes
At
23
Volts
DC
32 26.5
24
12
9.6
5.5 4.8
24
Volts
DC
60
to
486
ipm
(1.5
to
12.3
mpm)
.023/.025
in.
(0.6
mm)
.030
in.
(0.8
mm)
.035
in.
~0.9
mm)
.
Dimensions
Weight
A: Width
13-1/2
~n.
(343
mm)
Net
Ship
B:
Length
27
in.
(686
mm)
205
lbs.*
215 lbs.
C:
Height
(93
kg)
(98
kg)
30
in.
(762
mm)
*Add
2-3/4
lbs.
(1.25 kg)
for units
with
spot
*Add
5
lbs.
(2.27 kg)
for units with
spot
TB-087
313-C
Figure
3-1.
Overall
Dimensions
I
-a
0
U
a
4
V
0
Chart
3-1.
Volt-Ampere
Curves
Chart
3-2.
Duty
Cycle
6 HIGH
5
4
3
2
1
LOW
0
25
50 75
100 125
150
175 200
DC AMPERES
8-057
436-lA
30
35
40
50
60 70
80
90
100
7.
DUTY
CYCLE
8-057
436-1
113 336
Page
7

3-1.
VOLT-AMPERE
CURVES
(Chart
3-1)
3-3.
DESCRIPTION
RATED
OUTPUT
The
volt-ampere
curves
show
the
voltage
and
amper
age
output
capabilities
of
the
unit.
Voltage
and
amper
age
adjustment
is
provided
by
the FINE
TUNING/WIRE
SPEED
control.
Curves
of
other
setting
fall
between
the
curves
shown.
With
the
use
of
the
volt-ampere
curves,
it
is
possible
to
determine
the
weld
amperage
at
any
particular
load
volt
age.
3-2.
DUTY
CYCLE
(Chart
3-2)
The
duty
cycle
is
the
percentage
of
a
ten
minute
period
that
a
welding
power
source
can
be
operated
at
a
given
output
without
overheating
and
damaging
to
the
unit.
This
welding
power
source
is
rated
at
60
percent
duty
cycle
when
operated
at
150
amperes.
The unit
can
be
operated
at
150
amperes
for
six
consecutive
minutes,
but it
must
operate
at
no
load
for
the
remaining
four
min
utes to
allow
proper
cooling.
If
the
welding
amperes
de
crease,
the
duty
cycle
increases.
Refer
to
the
Duty
Cycle
chart
(Chart
3-2)
to
determine
the
output
of
the
welding
power
source at
various
duty
cycles.
AA
CAUTION:
EXCEEDING
DUTY
CYCLE
RAT
INGS
will
damage
the
weldIng
power
source.
S
Do
not
exceed
indicated
duty
cycles.
This
unit
is
a
single-phase
constant
voltage
dc
arc
weld
ing
power
source
and
wire
feeder
system.
This
unit
is
de
signed
for
Gas
Metal
Arc
Welding
(GMAW)
with
short
circuit
or
spray
transfer.
It is
designed
primarily
for
use
as
a
dc
Electrode
Positive/Reverse
Polarity
machine.
Rated
weld
output
is
150
amperes,
23
volts
dc,
at
60%
duty
cycle.
Models
with
the
optional
SPOT
PULSE
WELD
PANEL
provide
the
controls for
regulating
spot
weld
time/pulse
on
time,
bumback
time,
and
pulse
off
time.
3-4.
SUPPLIED
EQUIPMENT
(Figure
3-2)
The
following
equipment
is
supplied
with
the
welding
power
source
and
requires
customer
installation
or
as
sembly:
A.
Running
gear
with
gas
cylinder
rack
and
bracket.
B.
Wail
receptacle
(200/230
volt
models
only).
C.
Work
cable,
work
clamp,
and
jack
plug.
D.
MWG-200
gun
with
5/8
inch
(16mm)
nozzle
and
two
contact
tubes for
each
wire
size.
E.
Drive
rolls
for
.023/.025,
.030,
and
.035
in.
(0.6,
0.8,
and
0.9
mm)
hard
wire.
The
welding
power
source
is
factory
equipped
with
9
ft.
(2.7
mm)
power
cord
(with
plug
on 200/230
volt
models),
gas
valve,
and
facilities
for
a
Spool
gun.
Spreader
Bar
Handle
Wall
Receptacle
FIgure
3-2.
Supplied
Equipment
113336
Page
8

REQUIRED
EQUIPMENT
The
additional
equipment
required
to
complete
jhe
Gas
Metal
Arc
Welding
(GMAW)
setup
can
be
obtained
from
your
local
welding
supplies
distributor.
A.
Gas
Cylinder
Two
types
of
gas
are
generally
used with
Gas
Metal Arc
Welding
(GMAW)
of thin
gauge
sheet
steel.
Carbon
dioxide
(C02)
is the
gas
recommended for
use
with this
welding
power
source/gun
combination.
A
mixture of 75
percent
argon
and 25
percent
carbon dioxide
also
gives
favorable
results.
Obtain
a
cylinder
of
selected
shielding
gas
from
your
supplier.
B.
Reguiator/Flowmeter
Regulator/f
lowmeters
provide
a
constant
shielding
gas
pressure
and flow
rate
during
the
welding
process.
Be
cause
gases
have
different
properties,
each
regulator/
flowmeter
is
designed
to
be used with
a
specific
gas
or
mixture
of
gases.
Regulator/flowmeters
cannot
be
changed
from
one
gas
to
another unless
the
proper
adapters
are
installed.
Obtain
the
proper
regulator/flow-
meter
for the
type
of
gas
used.
C.
Gas
Hose
Measure
distance from
gas
cylinder
to
welding
power
source.
Obtain
good
quality
5/8
in.
(16
mm)
outside di
ameter,
S.A.E.
gas
hose,
and
install
5/8-18
right
hand
thread
fittings
on
both
ends of hose.
D.
Wire
Spool
For
GMAW
Process
Selection
of the
correct
welding
wire
is
important
in
Gas
Metal
Arc
Welding
(GMAW).
There
are
many
types
to
choose
from,
but
certain wires
are
best
suited for
weld
ing
thin
gauge
sheet
steel. The
American
Welding
Soci
ety
(AWS)
classification
for
GMAW
wires
is
usually
indi
cated
on
the label of
the wire
spool.
Two AWS
wire
classes
recommended
are
E7OS-6
and
E7OS-3.
The
E7OS-6
provides
a
more
fluid
(wetter)
weld
puddle
and
a
flatter
bead than
E7OS-3.
Obtain
a
spool
of
selected
wire.
E.
Personal
Safety
Equipment
When
using
this
welding
power
source,
wear a
welding
helmet,
fitted with
the
proper
filter
lens,
to
protect
the
eyes
from the
welding
arc.
Also
wear
protective
clothing,
safety
glasses,
and
gloves
to
prevent injury.
F.
Offset/Punching
Tool
(Figure
3-4)
The
damaged
area
is
cut
away
and the
jaws
of the
offset
portion
of the head
are
placed
over
the
sheet
steel.
When
pressure
is
applied
to
the
handles,
the
tool indents
a
small offset
in
the
sheet
steel.
A
new
piece
of
sheet
steel,
cut to
size,
is
placed
in
position
to
overlap
the off
set
portion.
The
new
piece
of
sheet
steel
is
welded
into
place,
sanded,
filled
with
body
putty,
and
finish
sanded.
The
head of
the
tool
can
be
rotated
one-half
turn
to
be
used
as a
punching
tool.
The
punching
tool
expedites
riveting
operations.
The
use
of this
tool will
keep
material
use
and
finishing
time
to
a
minimum.
3-5. ADDITIONAL
(Figure 3-3)
Gas
Cylinder
The
repair
of
automotive sheet
steel is
easier when
an
Offset/Punching
tool
is
used. This
tool
has
a
dual
pur
pose,
rotating
head.
Wire
Spool
Gloves
I
Gas
Hose
Safety
Reguiator/Fiowmeter
Glasses
Figure
3-3.
Additional
Required
Equipment
Figure
3-4.
Offset/Punching
Tool
113
336
Page
9

3-6.
OPTIONAL EQUIPMENT
3-7.
CONSUMABLE
PARTS
The
following
equipment
can
be
obtained
to
extend the
capabilities
of the
basic
unit
or
to
suit
special
applica
tions:
A.
SPW-1,
Spot,
Pulser,
Continuous
Panel
(in
cludes
three
spot
nozzles)
(for
installation
see
Section
4-3)
B.
Spoolgun
C.
Gun cable
holder
D. 25 ft
(7.6
m)
power
cord extension
The
following
parts
are
subject
to
wear
ordamage
in
nor
mal
use:
A.
Contact
tubes
B.
Nozzles
C. Gun liner
D.
Drive rolls
SECTION
4-INSTALLATION
a
WARNING: FIRE
OR
EXPLOSION
can
result
from
placing
unit
on or over
combustible
surfaces;
RESTRICTED
AIRFLOW
can cause
overheating
and
possible damage
to
internal
parts.

Do
not
locate unit
over
combustible
surfaces.

Maintain
at
least
18
inches
(457
mm)
of
unrestricted
space
on
all
sides
of
unit,
and
keep
underside free of obstructions.

Do
not
place
any
filtering
device
over
the
in
take
air
passages
that
pro
vide airflow
forcoollng
this unit.
Warranty
is void
if
any
type
of
filtering
device
is
used
at
intake
air
passages.
4-2.
TRANSPORTING METHODS
This
welding
power
source
is
equipped
with
a
lifting
eye
TB-072
513-C
for
moving
the
unit
during
installation.
Weight
capacity
of
the
lifting
eye
only
allows
for
supporting
the
welding
power
source.
2.
Shielding
gas
supply
3.
Adequate
ventilation and fresh air
supply
4.
No
flammables
5.
A
clean
and
dry
area
7.
Proper
airflow
around
unit
a
WARNING:
ELECTRIC SHOCK
can
kill.

Do
not
touch ilve
electrical
parts.

Disconnect
input
power
conductors
from
deenergized
supply
ilne
BEFORE
moving
weld
ing
power
source.
FALLING
EQUIPMENT
can cause
serious
personal injury
and
equipment
damage.

Use
lifting
eye
to
lift
unit
only,
NOT
running
gear, gas
cylinders,
or
any
other
heavy
accessories
or
devices.

Use
equipment
of
adequate
capacity
to
lift
the
unit.

If
lifting
or
moving
this unit with
lift
forks
under
the
base,
be
sure
that lift forks
are
long
enough
to
extend
beyond
opposite
side
of
the
base.
Using
lift
forks
too
short
can
damage
internal
parts
if
tips
of
the
lift forks
penetrate
the unit
base,
or
may
cause
personal
injury
and/or
equipment
damage
if
unit
falls off
the lift
forks.
4-1.
SITE
SELECTION
(Figure
4-1)
18
In.
(457
mm)
FIgure
4-1.
Location
Select
an
installation
site
which
provides
the
following:
1.
Correct
input
power
supply
(see
unit
nameplate)
6.
Proper
temperature
that avoids
extremes
of
heat
or
cold
8.
Adequate
space
for
opening
side
access
doors for
installation, maintenance,
and
repair
functions.
Base
mounting
holes
provide
the
capability
to
install
and
secure
the unit
on
a
running
gearor
in
a
permanent
loca
tion.
113336
Page
10

4-3.
RUNNING
GEAR
INSTALLATION
(Figure
4-2)
a
UNCONTROLLED
TILTING OR
TIPPING
of
unit
can
result
In
personal
Injury
or
equip
ment
damage.

Use
equipment
of
adequate
capacity
to
lift the
unit.

If
using
lift forksto
handle this
unit,
be
sure
the
lift
forks
are
long
enough
to
extend
out
of the
op
posite
side
of
the
base.

Do
not
place
any
part
of the
body
under
the
unit while
it is
suspended.
Place
blocks
underframe
of unit
before
installing
running
gear.
1.
Install
the
two
4
in.
(102
mm)
casters
and
spreader
bar
onto
the
front
corners
of
the
welding
power
source
base
as
shown
in
Figure
4-2
using
3/8
in.
hardware.
2.
Block the unit
up
securely
in
middle
to
ease
installa
tion
of
rear
wheel/gas
cylinder
rack
assembly.
3.
Slide
axle
through
cylinder
rack,
and install
a
wheel
on
each end of
axle
with
a
3/4
in.
flat
washer
on
each
side of
wheel.
4.
Secure wheels
in
place
with
supplied
retaining
rings.
Running
Gear
Nut
Washer
5.
Install
cylinder
rack
onto
welding
power
source
base
using
5/16-18
x
3/4
cap
screws
and
associated
hardware
(see
Figure
4-2).
6.
Remove
the
two
front
cap
screws
in
top
of
welding
power
source
wrapper
and
discard.
Install
running
gear
handle
onto
wrapper
using
1/4-20
x
3/4
cap
screws
as
shown
in
Figure
4-2.
7.
Install
cylinder
bracket
onto
rear
panel
of
welding
power
source
as
shown
in
Figure
4-2
using
1/4-20
x
3/4
cap
screws
and
existing
holes
in
rear
panel.
8.
Install
safety
chain
onto
cylinder
bracket.
4-4.
OPTIONAL
SPW-1
PANEL
INSTALLATION
(Figure
4-3)
a
WARNING:
ELECTRIC
SHOCK
can
kill.

Do
not
touch
live
electrical
parts.

Shutdown
welding
powersource,
and
discon
nect
input
power
employing
lockout/tagging
procedures
before
inspecting
or
installing.
Lockout/tagging procedures
consist
of
removing
input
power
plug
from
receptacle,
padlocking
line
disconnect
switch
in
open
position,
remov
ing
fuses
from
fuse
box,
or
shutting
off and red-
tagging
circuit
breaker
or
other
disconnecting
device.
Fiat
Washers
Retaining
Ring
TC-049
808-E
Figure
4-2.
RunnIng
Gear
Installation
Cap
Screw
Spreader
Bar
Casters
113
336
Page
11

IMPORTANT: SPW-
I
Spot
Panel
will
not
provide
spot
capabilities
for the
Spool
gun.
Retain all hardware
re
moved
during
this
procedure
for
reinstallation.
All
direc
tions,
such
as
left
or
right,
are
with
respect
to
the
opera
tor
facing
the front
paneL
1.
Remove module
cover
plate
from
upper
right-hand
corner
of front
panel.
2.
Locate
wiring
harness
clamped
to
air
baffle.
Re
move
wiring
harness from
first
clamp
and
carefully
pull
end
of
wiring
harness with
connectors
through
opening
in
front
panel
-
it
will
come
though
approxi
mately
2 in.
(51
mm).
Disconnect
jumpered
connector
form
plug
PLG2.
Connect
receptacle
RC55
from
SPW-1
panel
to
PLG2.
Be
sure
the
connectors
are
locked
together
(see
Figure
4-3).
5.
Install
SPW-1
panel
into
upper
right
corner
of
front
panel,
and
secure
using
screws
removed
in
Step
1.
a
WARNING: PRESSURIZED
CYLINDERS
can
rupture
causing
serious
personal
Injury
and
loss
of
life;
FALLING
CYLINDERS
can cause
serious
injury
and
equipment
damage.

Keep cylinders
away
from
any
welding
or
oth
er
electrical circuits.

Never allow
a
welding
electrode to
touch
any
cylinder.

Always
fasten
cylinder
securely
to
running
gear
bracket,
a
wall,
or
other
stationary
support.
B.
Regulator/Flowmeter
(Customer
Supplied)
(Figure
4-4)
1.
With
the
cylinder
correctly
installed,
remove
cylinder
cap
(see
Figure
4-4).
Stand
to
one
side
of the
cylin
der
valve,
and
open
the valve
slightly.
When
gas
flows from
cylinder,
close
valve.
This
procedure
gets
rid
of
any
dust
or
dirt
that
may
have
accumulated
around
the
valve
seat.
4-5.
SHIELDING
GAS
INSTALLATION
A.
Gas
Cylinder
(Customer
Supplied)
(Figure
3-3)
Secure
gas
cylinder
to
running
gear
using
safety
chain
on
cylinder
bracket.
If
the
running
gear
is
not
to
be
used,
chain
cylinder
to
wall
or
other
stationary
support
to
pre
vent
the
cylinder
from
falling
over
and
breaking
off
the
valve.
3.
4.
Cap
/
Receptacle
RC55
Gas
Cylinder
Valve
Cylinder
Gas
Hose
Connection
(5/8-18
Male
Fitting
Required)
C02
Installation
FIgure
4-3.
SPW-1
Panel
Installation
Gas
Connection
(5/8-18
Male
Fitting
Required)
19-109
492
Figure
4-4.
TypIcal
Regulator/Flowmeter
Installation
113
336
Page
12