MAC TOOLS MW13O - Principal Safety Standards

WELDING
can cause
fire
or
explosion.
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
orwelding
wire
te
metal
objects
can
cause
sparks,
overheating,
or
fire.
Protect
yourself
and
others
from
flying
sparks
and hot
metal.
Do
not
weld
where
flying
sparks
can
strike
flammable
material.
Remove
all
flammableswithin
35
ft
(10.7
m)
of the
welding
arc.
If
this
is
not
possible,
tightly
cover
them with
approved
covers.
Be
alert that
welding
sparks
and hot
materials
from
welding
can
easily
go
:hrough
small
cracks
and
openings
to
adjacent
areas.
5.
Watch
for
fire,
and
keep
a
fire
extinguisher
nearby.
6.
Be
aware
that
welding
on a
ceiling,
floor,
bulkhead,
or
partition
can
cause
fire
on
the hidden side.
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
shces.
and
a
caD.
PRINCIPAL
SAFETY
STANDARDS
Safety
in
Welding
and
Cutting,
ANSI Standard
Z49.1,
from
American
Welding Society.
550
N.W. Le.Jeune
Rd,
Miami FL
33126
Safety
and Health
Standards,
OSHA
29 CFR
1910,
from
Superintendent
of
Documents,
U.S. Government
Pnnting
Office,
Washington,
D.C.
20402.
Recommended Safe
Practices
for
the
Preparation
for
Weldingand
Cuttingof
Contain
era
That
Have Held
Haza
rdous
Substances.
American
Welding
Society
Standard
AWS
F4.1,
from
American
Welding Society,
550
N.W.
LeJeune
Rd, Miami,
FL
33126
National
Electrical
Code,
NFPA
Standard
70,
from National
Fire
Protection
Association,
Batteryrnarch
Park,
Quincy,
MA
02269.
Safe
Handling
of
Compressed
Gases
in
Cylinders,
CGA
Pamphlet
P-I,
from
Compressed
Gas
Association,
1235
Jefferson
Davis
Highway.
Suite
501,
Arlington,
VA
22202.
Code for
Safety
in
Welding
and
Cutting,
CSA Standard
Wi
17.2,
from Canadian
Standards
Association.
Standards
Sales,
178 Rexdale
Boulevard,
Rextiale, Ontario,
Canada
M9W
1
R3.
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.
Cutting
And
Welding
Processes,
NFPA
Standard
510,
from
National
Fire
Protection
Association,
Batterymarch
Park,
Quincy,
MA
02269.
TABLE
OF CONTENTS
SECTION
1

SPECIFICATIONS
1-1.
Volt-Ampere
Curve
And
Duty Cycle
Chart
1
SECTION
2
INSTALLATION
2-i.
Installing
Work
Clamp
2
2-2.
Installing
Gas
Supply
2
2-3.
Connecting
Input
Power
2
2-4.
Gun
Polarity
For Wire
Type
3
2-5.
Installing Welding
Gun
3
2-6.
Threading
And
Feeding Welding
Wire
4
SECTION
4
MAINTENANCE
&
TROUBLESHOOTING
4-1.
Overload Protection
6
4-2.
Drive
Assembly
Maintenance
7
4-3.
Gun
Maintenance 8
4-4.
Troubleshooting
8
SECTION
5
ELECTRICAL
DIAGRAMS
9
SECTION
6
PARTS LIST
Figure
6-1.
Main
Assembly
Figure
6-2.
MWG-1
60M
Gun
11
12
1.
2.
3.
4.
I
FLYING SPARKS
AND
HOT
METAL
can
1.
Wear
approved
face
shield
or
safety
goggles.
Side
shields
cause
injury,
Chipping
and
grinding
cause
flying
metal.
As
welds
cool,
they
can
throw
off
slag.
2.
recommended.
Wear
proper
body
protection
to
protect
skin.
CYLINDERS
can
exptodelf
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,
-
3.
Keep-trtinders--away-lrom--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.
1.
Protect
compressed
gas
cylinders
from
excessive
heat,
mechanical
shocks,
and
arcs.
S.
7.
Turn
face
away
from
valve outlet when
opening
cylinder
valve.
Keep
protective
cap
in
place
over
valve
except
when
cylinder
is
in
use or
connected
for
use.
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.
8. Read and follow
instructions
on
compressed
gas
cylinders.
associated
equipment,
and
CGA
publication
P.1
listed
in
Safety
Standards.
SECTION
3OPERATION