Wire Drive - MAC TOOLS MW250 Owner's Manual

5-3. Wire Drive
Assembly Maintenance
READ SAFETY BLOCKS
at start
of
Section 5 before proceeding.
Figure
5-5. Wire Drive Assembly
Maintenance
Turn Off unit and disconnect
input
power.
Rot. ST-801 099/ SA.145 763 / ST-154 633
1
1
Wire
Spool
2 Gun Contact
Tip
Cut
welding wire off
at contact
tip.
Retract wire
onto
spool and
se
cure.
/
3
Drive Roll
Alignment Bolt
Turn in
or
out until groove lines
up
with wire
guide.
4 Drive Roll
5 Wire Inlet Guide
Remove
guide by pressing
on
barbed
area
or
cutting off
one
end
near
housing
and
pulling
it
out
of
hole. Push
new
guide
into hole
from
rear
until it snaps in
place.
6 Pressure Roll Arm
7 Cotter Pin
8 Pin
9
Screw
10 Bearing
Remove
beaflng
as
shown. Install
new
bearing and
secure
with
screw.
Reinstall
arm
onto
pin and
secure
with
cotter pin.
Thread
welding
wire
(see
Section
3-7).
Close door.
Correct
Alignment
Tools Needed:
OM-154 501 Page 14