Installing - MAC TOOLS MW250 Owner's Manual

3-7. Installing
Wire
Spool
And
Adjusting
Hub Tension
Figure 3-8. Installing
Wire
Spool And Adjusting
Hub Tension
3-8. Threading And Feeding Welding
Wire
a
WARNING
CYLINDERS
can
explode
if
damaged.
Keep cylinders
away from
welding
and other
electrical circuits.
Never touch cylinder with welding electrode.
Always
secure
cylinder to running
gear,
wall,
or
other
stationary support.
ELECTRIC SHOCK
can
kill.
Do
not
touch live electrical
parts.
The welding
wire, drive rolls, drive
assembly,
and all
metal
parts touching
the
welding
wire
are
electrically
live when
welding
or
feeding wire using
gun
trigger.
WELDING WIRE
can cause
puncture
wounds.
Do
not
press gun
trigger until instructed to do
so.
Do not point gun toward any
part
of the
body, other
people,
or
any metal when threading welding wire.
HOT SURFACES
can
burn skin.
Allow gun
to
cool before touching.
swarn5.1 10/91
/
swarn2.1 9/91
Turn Off unit.
1
Wire Spool
2 Gun Contact Tip
If necessary, cut welding wire off at
contact tip, and retract wire
onto
spool and
secure.
3 Retaining Ring
4 Compression Spring
Remove ring and pull off spool.
Compression spring
is used with 8
in (200 mm) spools.
5 Hub
6 Hub Pin
Slide
spool
onto hub
so
wire feeds
off bottom. Turn
spool
until hub
pin
fits hole in back of spool. Reinstall
retaining ring.
7 Hub Tension Nut
Grasp spool in
one
hand and
turn
while using
a
wrench to adjust hub
tension
nut.
When
a
slight
force is
needed to turn spool, tension is
set.
Thread welding wire (see Section
3-8). Close door.
Tools Needed:
~ 15/16 in
Ref. ST-801 103-B / Ref. ST-072 573-B
OM-154 501 Page 9