Miller GA-50C1 Owner's manual
- Category
- Welding System
- Type
- Owner's manual
This manual is also suitable for
Miller GA-50C1 is an air-cooled welding gun designed for the Gas Metal Arc Welding (GMAW) process. It boasts a 500-ampere rating and can handle wire diameters ranging from .045 to 1/8 inches (1.1 to 3.2 mm) for hard wire and flux-cored options. Its curved head tube provides enhanced maneuverability, while the 360-degree rotating handle offers user comfort. With its quick adaptability for different wire sizes and easy replacement of liners and contact tubes, the GA-50C1 is a versatile tool.
Miller GA-50C1 is an air-cooled welding gun designed for the Gas Metal Arc Welding (GMAW) process. It boasts a 500-ampere rating and can handle wire diameters ranging from .045 to 1/8 inches (1.1 to 3.2 mm) for hard wire and flux-cored options. Its curved head tube provides enhanced maneuverability, while the 360-degree rotating handle offers user comfort. With its quick adaptability for different wire sizes and easy replacement of liners and contact tubes, the GA-50C1 is a versatile tool.
June
1988
FORM:
OM-1519A
Millerfi
Effective
With
Style
No.
JG-20
MODEL
GA-50C1
OWNERS
MANUAL
IMPORTANT
Read
and
understand
the
entire
contents
of
both
this
MIller
Electric
Mfg.Co.
manual
and
the
power
source
manual
used
with
this
unit,
with
special
emphasis
on
the
safety
material
throughout
both
manuals,
before
in-
pa.
Box
1079
stalling,
operating,
or
maintaining
this
equipment.
This
unit
and
these
instructions
are
for
use
only
by
persons
trained
and
experienced
in
the
Appleton,
WI
54912
USA
Tel.
414-734-9821
safe
operation
of
welding
equipment.
Do
not
allow
untrained
persons
to
install,
operate,
or
maintain
this
unit.
Contact
your
distributor
if
you
do
not
fully
understand
these
instructions.
PRINTED
IN
U.S.A.
ADDITIONAL
COPY
PRICE
30
CENTS
This
warranty
supersedes
all
previous
MILLER
warranties
and
is
exclusive
with
no
other
guarantees
or
warranties
expressed
or
implied.
LIMITED
WARRANTY
-
Subject
to
the
terms
and
condi-
In
the
case
of
Millers
breach
of
warranty
or
any
other
duty
tions
hereof,
Miller
Electric
Mfg.
Co.,
Appleton
Wisconsin
with
respect
to
the
quality
of
any
goods,
the
exclusive
remedies
warrants
to
its
Distributor/Dealer
that
all
new
and
unused
therefore
shall
be,
at
Millers
option
(1)
repair
or
(2)
replacement
Equipment
furnished
by
Miller
is
free
from
defect
in
workman-
or,
where
authorized
in
writing
by
Miller
in
appropriate
cases,
(3)
~
ship
and
material
as
of
the
time
and
place
of
delivery
by
Miller.
the
reasonable
cost
of
repair
or
replacement
at
an
authorized
~
No
warranty
is
made
by
Miller
with
respect
to
engines,
trade
Miller
service
station
or
(4)
payment
of
or
credit
for
the
purchase
accessories
or
other
items
manufactured
by
others.
Such
price
(less
reasonable
depreciation
based
upon
actual
use)
upon
engines,
trade
accessories
and
other
items
are
sold
subject
to
return
of
the
goods
at
Customers
risk
and
expense.
MILLERs
the
warranties
of
their
respective
manufacturers,
if
any
All
option
of
repair
or
replacement
will
be
F.O.B.,
Factory,
at
S
engines
are
warranted
by
their
manufacturer
for
one
year
from
Appleton,
Wisconsin,
or
F.O.B.,
at
a
MILLER
authorized
service
date
of
original
purchase,
except
Tecumseh
engines
which
facility,
therefore,
no
compensation
for
transportation
costs
of
have
a
two
year
warranty,
any
kind
will
be
allowed.
Upon
receipt
of
notice
of
apparent
defect
or
failure,
Miller
shall
instruct
the
claimant
on
the
warranty
5~
Except
as
specified
below,
Millers
warranty
does
not
apply
claim
procedures
to
be
followed.
to
components
having
normal
useful
life
of
less
than
one
(1)
d~
year,
such
as
spot
welder
tips,
relay
and
contactor
points,
I
MILLERMATIC
parts
that
come
in
contact
with
the
welding
ANY
EXPRESS
WARRANTY
NOT
PROVIDED
HEREIN
AND
~/
wire
including
nozzles
and
nozzle
insulators
where
failure
does
ANY
IMPLIED
WARRANTY,
GUARANTY
OR
REPRESENTA
not
result
from
defect
in
workmanship
or
material.
TION
AS TO
PERFORMANCE,
AND
ANY
REMEDY
FOR
BREACH
OF
CONTRACT
WHICH,
BUT
FOR
THIS
PROVISION,
~
Miller
shall
be
required
to
honorwarranty
claims
on
war-
MIGHT
ARISE
BY
IMPLICATION,
OPERATION
OF
LAW,
~
ranted
Equipment
in
the
event
of
failure
resulting
from
a
defect
CUSTOM
OF
TRADE
OR
COURSE
OF
DEALING,
INCLUDING
,~
within
the
following
periods
from
the
date
of
delivery
of
Equip-
ANY
IMPLIED
WARRANTY
OF
MERCHANTABILITY
OR
OF
ment
to
the
original
user:
FITNESS
FOR
PARTICULAR
PURPOSE,
WITH
RESPECT
TO
)
ANY
AND
ALL
EQUIPMENT
FURNISHED
BY
MILLER
IS
EX
q
1.
Ait
welders,
pos~r
sources,
,vbols,
and
components
.
1
year
CLUDED
AND
DISCLAIMED
BY
MILLER.
2.
Load
banks
1
year
3.
Original
main
power
rectifiers
3
years
(labor
-
1
year
only)
EXCEPT
AS
EXPRESSLY
PROVIDED
BY
MILLER
IN
4.
All
welding
guns,
feeder/guns
and
torches
90
days
WRITING,
MILLER
PRODUCTS
ARE
INTENDED
FOR
~
5. All
other
Millermatic
Feeders
1
year
ULTIMATE
PURCHASE
BY
COMMERCIAL/INDUSTRIAL
6.
Replacement
or
repair
parts,
exclusive
of
labor
60
days
USERS
AND
FOR
OPERATION
BY
PERSONS
TRAINED
AND
7.
Batteries
6
months
EXPERIENCED
IN
THE
USE
AND
MAINTENANCE
OF
WELDING
EQUIPMENT
AND
NOT
FOR
CONSUMERS
OR
~fJ
provided
that
Miller
is
notified
in
writing
within
thirty
(30)
days
CONSUMER
USE.
MILLERS
WARRANTIES
DO
NOT
EXTEND
of
the
date
of
such
failure.
TO,
AND
NO
RESELLER
IS
AUTHORIZED
TO
EXTEND
~
As
a
matter
of
general
policy
only,
Miller
may
honor
claims
MILLERS
WARRANTIES
TO,
ANY
CONSUMER..
~
submitted
by
the
original
user
within
the
foregoing
periods.
....
.-....~
-
LIMITED
WARRANTY
EFFECTIVE:
FEBRUARY
16.
1988
ERRATA
SHEET
March
23,
1990
FORM:
OM-1519A
**First
digit
represents
page
no
-
digits
following
dash
represent
item
no.
BE
SURE
TO
PROVIDE
MODEL
AND
SERIAL
NUMBER
WHEN
ORDERING
REPLACEMENT
PARTS.
FQE
copy
/~JURN
TO
FOLDER
After
this
manual
was
printed,
refinements
in
equipment
design
occurred.
This
sheet
lists
exceptions
to
data
appearing
later
in
this
manual.
AMENDMENT
TO
PARTS
LIST
Amend
Parts
List
as
follows:
All
Parts
Eff
w/KA-25
Part
Replaced
**
No.
With
Description
Quantity
2-18
079
856
134
601
SLEEVE,
centering
monocoil
1
2-19
059
063
114
974
LINER,
monocoil
1/16-5.64
x
lift
6in
1
2-19
059
064
114
973
LINER,
monocoil
1/16-5/64
wire
x
l6ft
8in
1
2-20
079 852
134
600
GUIDE,
wire
outlet
1/1
6-5/64
1
TABLE
OF
CONTENTS
Section
No.
Page
No.
SECTION
1
-
INTRODUCTION
1
-1.
DutyCycle
1
1
-
2.
General
Information
And
Safety
1
1
-
3.
Receiving-Handling
1
1
-
4.
Description
1
SECTION
2
-
INSTALLATION
2
-
1.
Gun/FeederConnectorinstallation
2
2
-
2.
Gun
Switch
Connection
2
2
-
3.
Shielding
Gas
Connection
2
2
-
4.
Gun
Switch
Adjustment
2
SECTION
3
-
SEQUENCE
OF
OPERATION
3-
1.
Gas
Metal
Arc
Welding
(GMAW)
3
3
-
2.
Shutting
Down
3
SECTION
4
-
MAINTENANCE
4
-
1.
Inspection
And
Upkeep
4
4
-
2.
Contact
Tube
Replacement
4
4
-
3.
Changing
Wire
Sizes
And
Replacing
Liners
4
4
-
4.
Head
Tube
Replacement
6
SECTION
1
-
INTRODUCTION
Rating:
100%
Duty
Cycle
Wire
Diameter
Cable
And
Hose
Length
Cooling
Method
Net
Weight
Ship
Weight
500
Amperes
With
C02
.045
To
5/64
in.
(1.1
To
2
mm)
Hard
Wire
.045
To
1/8
in.
(1.1
mm
to
3.2
mm)
Flux
Cored
10
ft.
(3
ml
15
ft.
(4.5
m)
Air
Air
12
lbs.
(5.4
kg)
14
lbs.
(6.4
kg)
14
lbs.
(6.4
kg)
16
lbs.
(7.3
kg)
Figure
1
-
1.
Specifications
1
-
1.
DUTY
CYCLE
-
The
duty
cycle
of
a
welding
gun
is
the
percentage
of
a
ten
minute
period
that
a
gun
can
be
operated
at
a
given
output.
This
gun
is
rated
at
100%
duty
cycle
using
C02
shielding
gas.
This
means
that
the
gun
can
be
operated
at
a
rated
load
continuous
ly.
jury
or
loss
of
life.
11.1
I
I]~1I
statements
include
installation,
operation,
and
maintenance
procedures
or
practices
which
if
not
carefully
followed
could
result
in
minor
personal
injury
or
damage
to
this
equipment.
1
-2.
GENERAL
INFORMATION
AND
SAFETY
A.
General
IMPORTANT
A
third
signal
word,
_______________,
highlights
instruc
tions
which
need
special
emphasis
to
obtain
the
most
efficient
operation
of
this
equipment.
following:
G
-
gun
A
-
air
cooled
50
-
ampere
rating:
500
ampere
C
-
curved
head
tube
SECTION
2
-
INSTALLATION
WARNING
_________
ELECTRIC
SHOCK
can
kill.
Do
not
touch
ilve
electrical
parts.
Shut
down
welding
power
source
and
disconnect
input
power
employing
lockout/tagging
pro
cedures
before
installing
gun.
Lockout/tagging
procedures
consist
of
padlocking
line
disconnect
switch
in
open
position,
removing
fuses
from
fuse
box,
or
shutting
off
and
red-tagging
circuit
breaker
or
other
disconnecting
device.
Information
presented
in
this
manual
and
on
various
labels,
tags,
and
plates
on
the
unit
pertains
to
equip
ment
design,
installation,
operation,
maintenance,
and
troubleshooting
which
should
be
read,
understood,
and
followed
for
the
safe
and
effective
use
of
this
equip
ment.
B.
Safety
The
installation,
operation,
maintenance,
and
troubleshooting
of
arc
welding
equipment
require
prac
tices
and
procedures
which
ensure
personal
safety
and
the
safety
of
others.
Therefore,
this
equipment
is
to
be
installed,
operated,
and
maintained
only
by
qualified
persons
in
accordance
with
this
manual
and
all
ap
plicable
codes
such
as,
but
not
limited
to,
those
listed
at
the
end
of
Section
1
-
Safety
Rules
For
Operation
Of
Arc
Welding
Power
Source
in
the
welding
power
source
Owners
Manual
Safety
instructions
specifically
pertaining
to
this
unit
ap
pear
throughout
this
manual
highlighted
by
the
signal
words
I~YI
And
which
identify
different
levels
of
hazard.
I~T1~1a~1Ii1Ic1
statements
include
installation,
opera
tion,
and
maintenance
procedures
or
practices
which
if
not
carefully
followed
could
result
in
serious
personal
in-
1
-
3.
RECEIVING-HANDLING
-
Before
installing
this
equipment,
clean
all
packing
material
from
around
the
unit
and,
carefully
inspect
for
any
damage
that
may
have
occurred
during
shipment.
Any
claims
for
loss
or
damage
that
may
have
occurred
in
transit
must
be
filed
by
the
purchaser
with
the
carrier.
A
copy
of
the
bill
of
lading
and
freight
bill
will
be
furnished
by
the
carrier
on
request
if
occasion
to
file
claim
arises.
When
requesting
information
concerning
this
equip
ment,
it
is
essential
that
Model
Description
and
Style
Number
of
the
equipment
be
supplied.
1
-
4.
DESCRIPTION
-
The
GA-50C1
gun
is
design
ed
specifically
for
the
Gas
Metal
Arc
Welding
(GMAW)
process.
The
gun
has
a
50
curved
head
tube,
and
the
trigger
can
be
rotated
360
around
the
handle
for
operator
convenience.
The
gun
is
shipped
with
the
necessary
components
for
the
specific
wire
size
ordered;
however,
through
minor
changes
in
parts,~the
gun
may
be
used
with
.045
thru
1/8
in.
(1.1
thru
3.2
mm)
wire.
The
alphanumeric
designation
refers
to
the
CAUTION
OM-l5l9Pagel
Nozzle
Cable/Conduit
Gun
Switch
Plug
Outlet
-
Guide
Contact
Tube
Monocoil
Stub
Liner
HeadTube
Gun
Trigger
Clamp
Monocoil
Setscrew
Rear
Monocoil
Gun
Handle
Shielding
Gas
Connector
Liner
Gun/Feeder
Connector
Monocoil
Setscrew
Insulator
Figure
2
-
1.
Gun
Components
8-080
859
IMPORTANT
IMPORTANT
2
-
1.
GUN/FEEDER
CONNECTOR
INSTALLA
TION
(Figure
2-1)
-
Install
the
gun/feeder
connector
into
the
drive
assembly
on
the
wire
feeder
as
follows:
______________
The
outlet
guide
is
provided
as
part
of
the
gun
assembly.
1.
Loosen
the
gun/feeder
connector
securing
knob
on
the
wire
drive
assembly.
_____________
The
outlet
guide
should
be
positioned
as
close
as
possible
to
the
drive
rolls
without
touching
them.
This
gives
the
wire
maximum
column
strength
thus
eliminating
waves.
2.
Insert
the
gun/feeder
connector
into
the
wire
drive
assembly.
3.
Tighten
the
gun/feeder
connector
securing
knob.
2
-
2.
GUN
SWITCH
CONNECTION
(Figure
2-1)
-
Connect
the
gun
switch
plug
into
the
switch
(trigger)
control
receptacle
on
the
wire
feeder
as
follows:
align
keyways,
insert
plug,
and
rotate
threaded
collar
fully
clockwise.
2
-3.
SHIELDING
GAS
CONNECTION
(Figure
2-1)
1.
Disconnect
gas
hose
from
drive
roll
housing
on
wire
feeder.
2.
Insert
barbed
fitting
on
gas
hose
from
gun
into
end
of
gas
hose
from
wire
feeder.
2
-4.
GUN
SWITCH
ADJUSTMENT
1.
Loosen
gun
switch
clamp.
2.
Rotate
gun
switch
assembly
to
desire
position
on
gun
handle.
3.
Tighten
clamp.
OM-1519
Page
2
SECTION
3-
SEQUENCE
OF
OPERATION
~~~EJ~J(
EXCEEDING
THE
RATED
AMPERAGE
WITH
CO2
OR
FAILING
TO
REDUCE
THE
WELDING
AMPERAGE
OR
DUTY
CYCLE
WHEN
USING
A
MIXED
SHIELDING
GAS
can
result
in
damage
to
the
gun.
Do
not
exceed
rated
amperage
when
using
CO2.
Operate
at
50%
duty
cycle
when
using
mixed
shielding
gases.
3
-
1.
GAS
METAL
ARC
WELDING
(GMAW)
1.
Be
sure
that
proper
electrical
connections
have
been
made
to
the
welding
power
source
and
the
wire
feeder.
2.
Be
sure
that
the
welding
wire
has
been
properly
threaded
and
that
correct
initial
tensions
have
been
set
on
the
drive
rolls
(refer
to
the
ap
propriate
Owners
Manual).
3.
Be
sure
that
the
proper
shielding
gas
is
con
nected
to
the
shielding
gas
valve.
4.
Place
the
wire
feed
control(s)
in
the
required
position
for
the
welding
setup.
5.
Place
the~controls
on
the
welding
power
source
in
the
required
position
for
the
welding
setup
(refer
to
welding
power
source
Owners
Manual).
6.
Turn
on
the
shielding
gas
supply.
7.
Energize
the
welding
power
source
and
the
wire
feeder
(refer
to
the
respective
Owners
Manuals).
~
ELECTRIC
SHOCK
can
kill.
WELDING
WIRE
can
cause
puncture
wounds.
Do
not
touch
live
electrical
parts.
Do
not
point
gun
toward
any
part
of
the
body,
other
personnel,
or
any
conductive
surface
when
threading
we/ding
wire.
The
welding
wire
and
all
metal
parts
in
contact
with
it
carry
weld
current
when
the
gun
trigger
is
depressed.
IMPORTANT
______________
When
installing
new
equipment,
or
after
prolonged
shutdown,
allow
shielding
gas
to
flow
continuously
for
at
least
one
minute
before
we/ding
to
purge
the
shielding
gas
line.
To
avoid
wasting
wire
while
purging,
open
the
drive
roll
housing.
8.
Press
Purge
button
on
the
wire
feeder
(if
ap
plicable)
or
the
gun
switch
to
purge
the
gas
line.
9.
Close
drive
roll
housing,
and
adjust
tension
(see
appropriate
Owners
Manual).
10.
Press
the
gun
switch,
and
run
the
welding
wire
out
beyond
the
end
of
the
gas
nozzle.
Cut
the
wire
off,
leaving
approximately
1/4
to
3/8
in.
(6.4
mm
to
9.5
mm)
from
end
of
nozzle.
11.
Set
the
Wire
Speed
control
slightly
higher
than
anticipated
wire
speed.
IATnaL~ll~Icr
ARC
RAYS,
SPARKS,
AND
HOT
SURFACES
can
burn
eyes
and
skin;
NOISE
can
damage
hearing.
Wear
correct
eye,
ear,
and
body
protection.
FUMES
AND
GASES
can
seriously
harm
your
health.
Use
enough
ventilation
to
keep
fumes
and
gases
from
the
breathing
zone.
See
Section
1
-
Safety
Rules
For
Operation
Of
Arc
Welding
Power
Source
in
welding
power
source
Owners
Manual
for
basic
welding
safety
information.
ELECTRIC
SHOCK
can
kill.
Do
not
touch
live
electrical
parts.
Do
not
touch
welding
wire
or
any
metal
part
in
contact
with
the
wire
while
welding.
The
welding
wire
and
all
metal
parts
in
contact
with
it
carry
weld
current
when
the
gun
switch
is
depressed.
12.
Hold
the
end
of
the
gas
nozzle
approximately
1/2
inch
(12.7
mm)
from
the
workpiece.
13.
Press
the
gun
switch,
initiating
the
gas
flow
and
wire
feed
and
establishing
the
arc.
If
the
welding
wire
appears
to
slip,
tighten
the
drive
roll
pressure
adjustment
in
1/4
turn
increments
until
the
wire
stops
slipping.
Do
not
overtighten.
14.
After
the
controls
on
the
welding
power
source
and
the
wire
feeder
(if
applicable)
have been
ad
justed
for
normal
operation,
the
welding
power
source
(and
wire
feeder)
will
function
automatically
when
the
gun
switch
is
pressed.
Releasing
the
switch
will
extinguish
the
arc
and
cause
the
wire
feed
and
gas
flow
to
stop.
3
-2.
SHUTTING
DOWN
1.
Stop
welding.
2.
Turn
off
welding
power
source
and
wire
feeder.
3.
Turn
off
the
shielding
gas
at
its
source.
L~~U~F
HIGH
CONCENTRATION
SHIELDING
GAS
can
harm
health
or
kill.
Shut
off
gas
supply
when
not
in
use.
OF
OM-1519
Page
3
SECTION
4
-
MAINTENANCE
4
-
1.
INSPECTION
AND
UPKEEP
-
Usage
and
shop
conditions
will
determine
frequency
and
type
of
maintenance
required.
L~~U~E
ELECTRIC
SHOCK
can
kill;
WELDING
WIRE
can
cause
puncture
wounds;
HOT
SURFACES
can
cause
severe
burns.
Do
not
touch
live
electrical
parts.
Shut
down
welding
power
source
and
wire
feeder
before
working
on
gun.
Disconnect
gun
from
wire
feeder
before
inspec
ting,
maintaining,
or
servicing.
Allow
a
cooling
period
before
servicing.
1.
Inspect
gun
for
broken
areas,
cracks
and
loose
parts;
tighten,
repair,
and
replace
as
required.
2.
Carefully
remove
any
weld
spatter
or
dirt
that
has
accumulated
around
the
nozzle
opening.
3.
Remove
any
weld
spatter
from
gun
switch,
if
ap
plicable.
4.
Repair
or
replace
as
required
all
hoses
and
cables;
give
particular
attention
to
frayed
and
cracked
insulation
and
areas
where
cables
enter
equipment.
5.
Remove
grease
and
dirt
from
components
and
moisture
from
electrical
parts
and
cables.
CAUTION
________
FLYING
DIRT
AND
METAL
PAR
TICLES
can
injure
personnel
and
damage
equip-
Point
gun
liner
only
in
a
safe
direction
away
from
personnel
and
equipment
when
cleaning
with
compressed
air~
6.
Clean
the
gun
casing
or
liner
using
compressed
air
whenever
the
wire
or
liner
is
removed.
4
-
2.
CONTACT
TUBE
REPLACEMENT
(Figure
2-1)
L~~U~E
ELECTRIC
SHOCK
can
kill;
WELDING
WIRE
can
cause
puncture
wounds;
HOT
SURFACES
can
cause
severe
burns.
Do
not
touch
live
electrical
parts.
Shut
down
we/ding
power
source
and
wire
feeder
before
working
on
gun.
Allow
a
cooling
period
before
servicing.
1.
Remove
nozzle.
2.
Cut
any
portion
of
the
electrode
wire
which
ex
tends
beyond
end
of
contact
tube.
3.
Remove
contact
tube,
and
install
a
new
contact
tube.
4.
Reinstall
nozzle,
and
resume
operation.
4
-3.
CHANGING
WIRE
SIZES
AND
REPLACING
LINERS
(Figure
2-1)
L~~E
ELECTRIC
SHOCK
can
kill;
WELDING
WIRE
can
cause
puncture
wounds;
HOT
SURFACES
can
cause
severe
burns.
Do
not
touch
live
electrical
parts.
Shut
down
welding
power
source
and
wire
feeder
before
working
on
gun.
Disconnect
gun
from
wire
feeder
before
inspec
ting,
maintaining,
or
servicing.
Allow
a
cooling
period
before
servicing.
Table
4
-
1.
Part
Changes
When
Changing
Wire
Size
Changing
Parts
Wire
Diameter
.045
in.
(1.1
mm)
.052
in.
(1.3
mm)
1/16
in.
(1.6
mm)
5/64
in.
(2.0
mm)
3/32
in.
(2.4
mm)
7/64
in.
(2.8
mm)
1/8
in.
(3.2
mm)
Contact
Tube
x
Contact
Tube
x
Contact
Tube
x
Contact
Tube
x
Contact
Tube
x
Contact
Tube
x
Contact
Tube
x
Monocoil
Liner
x
x
Monocoil
Liner
x
x
.
Monocoil
Liner
x
x
x
Outlet
Wire
Guide
x
x
x x
Outlet
Wire
Guide
x
x
x
ment.
OM-1519
Page4
When
changing
welding
wire
size,
it
may
be
necessary
to
change
the
contact
tube,
liner,
and
outlet
wire
guide.
Refer
to
Table
4-1
for
information
concerning
changing
parts
for
the
selected
wire
size.
1.
Remove
nozzle.
2.
Cut
any
portion
of
welding
wire
which
extends
beyond
end
of
contact
tube.
3.
Remove
contact
tube.
I
lid
~s1
~I
1
If
changing
the
wire
size
from
a
3/32
in.
(2.4
mm)
or
larger
diamter
wire
to
a
wire
smaller
than
3/32
in.,
install
a
centering
sleeve
inside
the
gun/feeder
connector,
and
proceed
to
Step
14.
If
changing
the
wire
size
from
a
5/64
in.
(2
mm)
or
smaller
diameter
wire
to
a
wire
larger
than
5/64
in.,
loosen
the
monocoil
setscrew
housed
in
the
gun/feeder
connector,
and
remove
the
centering
sleeve
from
inside
the
connector.
Proceed
to
Step
17.
4.
Manually
retract
welding
wire
onto
wire
spool.
(Refer
to
the
wire
feeder
Owners
Manaul.)
5.
Disconnect
gun
from
wire
feeder.
6.
Remove
outlet
wire
guide.
7.
Remove
the
monocoil
setscrew
at
the
gun/feeder
connector
end
of
gun
assembly.
IMPORTANT
_______________
If
changing
the
wire
size
from
a
small
diameter
wire
(.045
in.
/1.
1
mm,
.052
in.
/1.3
mm,
1/16
in.
/
1.6
mm,
and
5/16
in.
/2
mm)
to
a
large
diamter
wire
(3/32
in.
/2.4
mm,
7/64
in.
/2.8
mm,
and
1/8
in.
/3.2
mm)
or
vice
versa,
it
is
necessary
to
remove
the
com
pression
spring
and
insulator.
8.
Loosen
gun
switch
clamp,
and
remove
the
tape
on
gun
handle.
9.
Loosen
monocoil
setscrew
on
the
gun
handle.
10.
Remove
head
tube.
II.];1f~t~J~
If
changing
the
wire
size
from
a
3/32
in.
(2.4
mm)
or
larger
diamter
wire
to
a
wire
smaller
than
3/32
in.,
remove
the
monocoil
stub
liner
housed
in
the
head
tube.
Push
the
liner
out
the
handle
end
of
the
head
tube.
11.
Lay
the
cable
assembly
straight
and
flat
(no
coils
in
cable/conduit).
12.
Pull
the
liner
out
from
the
head
tube
end
of
the
gun
assembly.
________
FLYING
DIRT
AND
METAL
PAR
TICLES
can
injure
personnel
and
damage
equip
ment.
Point
gun
liner
only
in
a
safe
direction
away
from
personnel
and
equipment
when
cleaning
with
compressed
air.
13.
Clean
the
gun
casing
or
liner
with
compressed
air
while
the
liner
or
welding
wire
is
removed.
CAUTION
IMPORTANT
______________
If
changing
only
the
gun
assembly
liner,
proceed
to
Step
18.
14.
Loosen
the
monocoil
centering
sleeve
setscrew
located
on
the
gun/feeder
connector.
15.
Insert
the
centering
sleeve
into
the
gun/feeder
connector,
aligning
the
groove
in
the
sleeve
with
the
3/8
in.
threaded
hole
for
the
monocoil
setscrew.
16.
Tighten
the
monocoil
centering
sleeve
setscrew,
locking
the
centering
sleeve
in
place.
17.
Replace
comression
spring
and
insulator,
if
ap
plicable.
18.
Install
the
liner
into
the
head
tube
end
of
the
gun
assembly.
IhW~.]:~
Lh1~
~
If
changing
the wire
size
from
a
5/64
in.
(2
mm)
or
smaller
diamter
to
a
wire
diameter
larger
than
5/64
in.,
it
is
necessary
to
install
an
appropriate
monocoil
stub
liner
in
the
head
tube.
Install
the
liner
into
the
handle
end
of
the
head
tube.
19.
Install
head
tube.
20.
From
the
gun/feeder
connector
end
of
the
gun
assembly,
push
the
liner
back
through
the
gun
casing
until
the
liner
will
go
no
farther.
21.
Replace
the
monoŁoil
setscrew
at
the
gun/feeder
connector
end
of
the
gun
assembly,
and
tighten
the
monocoll
setscrew
on
the
gun
handle.
~~UU~(
OVERTIGHTENING
SETSCREW
will
damage
liner.
Do
not
overtighten
liner
setscrew.
22.
Install
appropriate
outlet
wire
guide.
LINER
23.
Cut
the
liner
off,
leaving
approximately
1/8
in.
from
the
end
of
the
outlet
wire
guide.
Be
sure
that
the
liner
does
not
touch
the
drive
rolls
when
the
gun
is
installed
on
the
wire
feeder.
(Refer
to
the
wire
feeder
Owners
Manual.)
24.
Install
appropriate
contact
tube.
25.
Reinstall
nozzle.
OM-1519
Page
5
________
ELECTRIC
SHOCK
can
kill.
Do
not
touch
live
electrical
parts.
Retape
gun
handle
so
that
monocoil
setscrew
head
is
fully
insulated.
26.
Retape
gun
handle,
and
tighten
gun
switch
clamp.
27.
Make
gun
connections
as
instructed
in
Sections
2-1
and
2-2.
~
ELECTRIC
SHOCK
can
kill;
WELDING
WIRE
can
cause
puncture
wounds;
ENERGIZED
WELDING
WIRE
may
cause
arcing
when
touching
conductive
objects.
Do
not
touch
live
electrical
parts.
Do
not
point
gun
toward
any
part
of
the
body,
other
personnel,
or
any
conductive
surface
when
threading
we/ding
wire.
Use
cold
wire
JOG
button,
if
available,
to
thread
wire.
The
welding
wire
and
all
metal
parts
in
contact
with
it
carry
weld
current
when
the
gun
trigger
is
depressed.
WARNING
28.
Thread
welding
wire,
and
resume
operation.
4
-
4.
HEAD
TUBE
REPLACEMENT
(Figure
2-1)
L~~U~E
ELECTRIC
SHOCK
can
kill;
WELDING
WIRE
can
cause
puncture
wounds;
HOT
SURFACES
can
cause
severe
burns.
Do
not
touch
five
electrical
parts.
Shut
down
welding
power
source
and
wire
feeder
before
working
on
gun.
Disconnect
gun
from
wire
feeder
before
inspec
ting,
maintaining,
or
servicing.
Allow
a
cooling
period
before
servicing.
1.
Remove
nozzle,
contact
tube,
monocoil
stub
liner
(if
applicable),
and
nozzle
adapter
from
head
tube.
2.
Remove
head
tube.
3.
Install
replacement
head
tube.
4.
Install
appropriate
nozzle
adapter,
monocoil
stub
liner
(if
applicable),
contact
tube,
and
nozzle.
OM-1519
Page6
-
-------~.----.-.---,
PARTS
LIST
June1988
FORM:
OM-1519A
Effective
With
Style
No.
JG-20
OM-1519
Page
1
1.2MM
1.3MM
1.6MM
2.0MM
2.4MM
2.8MM
3.2MM
.045
.052
1/16
5/64
3/32
7/64
1/8
1
2
3
36
5
8
32-
41
20
19
15
21
26
Figure
A
-
Exploded
View
Of
Gun
Assembly
TC-080
858-A
Item
Part
No.
No.
Description
Quantity
Figure
A
Exploded
View
of
Gun
Assembly
1
075659
1
t008
620
1
1
t075
662
1
1
t075
663
1
1
t075
665
1
1
t075
660
1
1
t081
922
1
2
045356
1
2
091653
1
2
009709
1
2
052055
1
2
008926
1
2
008925
1
2
008924
1
3
075948
1
4
073777
1
5
091272
1
6
076130
1
7
008057
1
8
076175
1
9
078894
1
10
056462
1
10
056 542
1
11
604550
lift
11
604550
l6ft
12
010606
1
13
010603
1
14
095949
1
15
079021
1
16
076051
1
17
605789
1
18
079856
1
19
053722
1
19
053721
1
19
059063
1
19
059064
1
19
007
594
1
19
007
595
1
20
079
852
1
20
079
851
1
21
079
860
1
21
079 859
1
22
048 825
1
23
004
733
2
24
004 732
2
25
005
589
1
26
079
855
1
26
079
854
1
27
079
878
1
28
079 535
4
29
048 834
1
30
604
525
1
31
604866
1
32
059 294
1
33
053132
1
34
059258
1
NOZZLE,
screw
type
5/8
orifice
x
2-3/8
.045
thru
1/8
wire
NOZZLE
screw
type
3/4
orifice
x
2-3/8
NOZZLE,
spot-flat
2-5/8
NOZZLE,
spot-inside
2-5/8
NOZZLE,
spot-outside
3-1
/8
NOZZLE,
15/l6orificex2-3/8
NOZZLE,
screw
type
5/8
orifice
x
1-7/8
TUBE,
contact
.045
wire
TUBE,
contact
.052
wire
TUBE,
contact
1/16
wire
TUBE,
contact
5/64
wire
TUBE,
contact
3/32
wire
TUBE,
contact
7/64
wire
TUBE,
contact
1/8
wire
ADAPTER,
nozzle
WASHER,
fIat-silicon
0.930
OD
TUBE,
head
(consisting
of)
INSULATOR,
centering-head
tube
LINER,
monocoil
1/16-1/8
wire
x
7-3/8
(3/32.
7/64,
1/8
wire
size)
HANDLE,
gun
SCREW,
flat
hd
1/4-20
x
3/8
HOSE,
gas
lOft
(consisting
of)
HOSE,
gas
1
5ft
(consisting
of)
HOSE,
No.
1
x3/16
ID
(order
by
ft)
HOSE,
No.
1
x
3/16
ID
(order
byft)
FITTING,
hose-brass
nut
5/8-18
RH
FITTING,
hose-brass
barbed
nipple
1/4
TBG
SPRING,
compression
SCREW,
set-socket
hd
3/8-16
x
1/2
INSULATOR,
adapter-gun/feeder
SCREW,
set-socket
hd
10-24
x
1/4
lOft
SLEEVE,
centering-monocoil
1
Oft
LINER,
monocoil
.045,
.052
wire
lOft
LINER,
monocoil
.045
wire
1
5ft
LINER,
monocoil
1/16,
5/64
wire
lOft
LINER,
monocoill/16,
5/64wirel5ft
LINER,
monocoil
3/32,
1/8
wire
lOft
LINER,
monocoil
3/32,
1/8
wire
1
5ft
GUIDE,
wire-outlet
.045,
.052,
5/64
wire
lOft
GUIDE,
wire-outlet
3/32,
1/8
wire
l5ft
CABLE,
conduit
lOft
(consisting
of)
CABLE,
conduit
1
5ft
(consisting
of)
ADAPTER,
gun/feeder
CLAMP,
conduit
cable
CLAMP,
conduit
cable
BODY,
gun
CORD,
power
lOft
(consisting
of)
CORD,
power
1
5ft
(consisting
of)
HOUSING
PLUG
&
PINS
(consisting
of)
TERMINAL,
male
CLAMP,
cable
CORD,
No.
18
2/c
(order
by
ft
as
reqd)
SWITCH,
licon
SPRING,
compression
STRAIN
RELIEF,
cable
BLOCK,
mtg-switch
OM-1519
Page2
Part
No.
Description
Figure
A
Exploded
View
of
Gun
Assembly
(Contd)
35
057
171
36
059
290
37
059
293
38
056845
39
010497
40
073 476
41
602
177
+079
196
+010
604
tOptional
Equipment.
+
Used
when
attached
a
50
series
feeder
BE
SURE
TO
PROVIDE
MODEL
WHEN
ORDERING
REPLACEMENT
PARTS.
Quantity
1
1
1
1
1
1
1
1
The
Following
Parts
Are
Required
To
Change
The
Gun
From
One
Wire
Size
To
Another.
(Some
Parts
Are
Common
To
More
Than
One
Wire
Size.)
See
View
On
Page
3
For
Identification
Of
Item
Numbers.
tOptional
Equipment
+
Used
when
attached
a
50
series
feeder
BE
SURE
TO
PROVIDE
MODEL
AND
SERIAL
NUMBER
WHEN
ORDERING
REPLACEMENT
PARTS.
Item
No.
LEVER,
actuating-switch
NUT,
speed-push
on
0.32
ID
x
7/16
OD
RIVET,
solid-flat
hd
7/32
x
1-1/4
HOUSING,
switch
CLAMP,
hose
0.660
x
1-3/4
dia
CLAMP,
strap-rubber
3/8
x
4-5/8
long
(as
reqd)
SCREW,
set-socket
hd
1/4-20
x
1/4
FITTING,
brass-barbed
F3/16TBGx
1/4
NPT
FITTING,
hose-brass
bushing
1/4
NPT
x
5/8-18
Model
10
FT
And
15
Ft
1.2MM
.045
1.3MM
.052
1.6MM
12.0MM
1/16
15/64
2.4MM
3/32
2.8MM
7/64
3.2MM
1/8
Item
No.
Part
No.
Description
2
045
356
TUBE,
contact
.045
wire
x
2
091
653
TUBE,
contact
.052
wire
x
2
009
709
TUBE,
contact
1/16
wire
x
2
052 055
TUBE,
contact
5/64
wire
x
2
008 926
TUBE,
contact
3/32
wire
x
2
008
925
TUBE,
contact
7/64
wire
x
2
008
924
TUBE,
contact
1/8
wire
x
7
008
057
LINER,
monocoil
3/32-1/8
wire
x
7-3/8....
x
x
x
17
605
789
SCREW,
set
socket
hd
10-24
x
1/4
x x
x x
18
079
856
SLEEVE,
centering-monocoil
x x
x
x
19
053
722
LINER,
monocoil
.045
wire
lOft
x
x
19
053
721
LINER,
monocoil
.045
wire
l5ft
x
x
19
059 063
LINER,
monocoil
1/16-5/64
wire
lOft
x
x
19
059
064
LINER,
monocoil
1/16-5/64
wire
l5ft
x
x
19
007 594
LINER,
monocoil3/32-1/8wire
lOft
x
x
x
19
007 595
LINER,
monocoil3/32-1/8wirel5ft
x x
x
20
079 852
GUIDE,
wire-outlet
.045-5/64
wire
x x
x
x
20
079
851
GUIDE,
wire-outlet
3/32-1
/8
wire
x
x
x
OM-1519
Page
3
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
Miller GA-50C1 Owner's manual
- Category
- Welding System
- Type
- Owner's manual
- This manual is also suitable for
Miller GA-50C1 is an air-cooled welding gun designed for the Gas Metal Arc Welding (GMAW) process. It boasts a 500-ampere rating and can handle wire diameters ranging from .045 to 1/8 inches (1.1 to 3.2 mm) for hard wire and flux-cored options. Its curved head tube provides enhanced maneuverability, while the 360-degree rotating handle offers user comfort. With its quick adaptability for different wire sizes and easy replacement of liners and contact tubes, the GA-50C1 is a versatile tool.
Ask a question and I''ll find the answer in the document
Finding information in a document is now easier with AI
