Wire Drive - MAC TOOLS MW250 Owner's Manual

5-3. Wire Drive Assembly Maintenance
£~
WARNING
READ SAFETY BLOCKS
at
start of
Section 5 before
proceeding.
Figure 5-5. Wire Drive Assembly Maintenance
Ret. ST-801 099 / SA-145 763/ ST-154 633
Turn Oft unit and disconnect
input
power.
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
bearing
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