Specifications

SECTION
5
-
MAINTENANCE
5
-
1.
INSPECTION
AND
UPKEEP
-
Usage
and
shop
conditions
will
determine
frequency
and
type
of
maintenance
required.
Perform
inspections,
once a
week.
WARNING
ELECTRIC
SHOCK
can
kill;
HOT
SURFACES
can
cause
severe
burns.

Do
not
touch live
electrical
parts.

Shut
down
welding
power
source
before
working
on
torch.

Disconnect
torch
from
welding
power
source
before
inspecting,
maintaining,
or
servicing.

Allow
a
cooling
period
before
servicing.
1.
Inspect
torch for
broken
areas,
cracks
and loose
parts;
tighten,
repair
and
replace
as
required.
2.
Remove
grease
and
dirt
from
components,
and
moisture
from
electrical
parts
and
cables.
5
-2.
TORCH BODY
MAINTENANCE
(Figure
3-1)
WARNING
_________
ELECTRIC
SHOCK
can
kill;
HOT
SURFACES
can cause severe
burns.

Do
not
touch
live
electrical
parts.

Shut
down
welding
power
source
before
working
on
torch.

Disconnect
torch from
welding
power
source
before
inspecting,
maintaining,
or
servicing.

Allow
a
cooling
period
before
servicing.
Once
a
week
inspect
condition
of torch
body
com
ponents.
Replace
cup,
heat
shield,
backcap,
and
0-rings
if
crack
ed.
Maintain
tight
fit of
torch
components
to
ensure
good
weld
quality.
5 -3.
INSPECTING
HOSES,
CONNECTIONS
AND
CABLES
WARNING
_________
ELECTRIC
SHOCK
can
kill.

Do
not
touch
live
electrical
parts.

Shut
down
welding
power
source
and
disconnect
input
power
employing
lockout/tagging
pro
cedures before
inspecting,
maintaining,
or
ser
vicing.
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.
Once
a
week
inspect
hoses and
connections.
A.
Coolant-In
C.
Power
Cable/Coolant-Out
Inspect
cables for breaks
in
insulation,
and
ensure
that
all
connections
are
clean and
tight. Repair
or
replace
cables
if insulation breaks
are
present.
Clean
and
tighten
connections
at
each
inspection.
5
-
4.
PREPARING
TUNGSTEN ELECTRODES
(Figure
5-1)
CAUTION
_________
HOT FLYING METAL PARTICLES
can
injure
personnel,
start
fires,
and
damage
equip
ment;
TUNGSTEN
CONTAMINATION
can
lower
weld
quality.

Shape
tungsten
electrode
only
with
properly
guarded
grinder
in
a
safe location
wearing
proper
face,
hand,
and
body protection.
 Do
not
use
same
wheel for
any
other
job
or
the
tungsten
will
become
contaminated.
Tungsten
electrode
shaping
should
be
done
on a
fine
grit,
hard
abrasive wheel. Since
tungsten
is
harder
than
most
grinding
wheels,
causing
the
tungsten
to
be
chip
ped
away
rather than
cut
away,
the
grinding
marks
should
run
lengthwise
with the electrode.
For
additional
information,
see
your
distributor
or re
quest
a
handbook from
factory
on
the
Gas
Tungsten
Arc
Welding
(GTAW)
process.
TUNGSTEN
PREPARATION:
IDEAL
Stable
Arc
Straight
Groun~,~~::~
Fiat
(the
Die.
of
thIs
Flat
Governs
Amperage
Capacity)
TUNGSTEN
PREPARATION:
WRONG
Arc
Wander
Point
Radial
Ground
Figure
5
-
1.
Tungsten
Preparation
TA-120
630
Inspect
coolant-in hose for breaks
and
clogs.
Keep
con
nections
clean and
tight
to
prevent
coolant
leaks.
B.
Gas
Gas
leaks
may
result
in
poor
weld
quality.
Inspect
hoses
for
breaks.
Keep
connections
clean
and
tight.
OM-1 568
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7