Drive Assembly; Maintenance - MAC TOOLS MW145 Owner's Manual

5-2. Drive
Assembly
Maintenance
~frs~)~
READ SAFETY BLOCKS
at start of
7 1 ~f~
~
Section 5 before
proceeding.
Turn Oft and
unplug unit.
1
Wire
Spool
2
Gun Contact
Tip
Cut welding wire off
at contact tip.
Retract wire onto spool and
secure.
3
Pressure Roll Arm
4
Cotter Pin
5
Pin
6 Screw
7 Bearing
Remove bearing
as
shown. Install
new
bearing and
secure
with
screw.
Reinstall
arm
onto pin
and
secure
with cotter pin.
8
Setscrew
9
Smooth Groove For Hard Wire
10 Drive Roll
Remove drive roll
as
shown.
Use
a
wire brush to clean drive roll.
Push drive roll
onto
shaft with de
sired groove in. Turn drive
roll
so
one
setscrew
faces flat side of shaft,
and tighten
both
setscrews.
11 Knurled Groove For Flux
Cored Wire
12
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.
Thread welding
wire (see
Section
3-8).
Close
door.
Tools Needed:
~
5/~1
51-155 504 / 5T-154 199
Figure
5-3. Drive Assembly Maintenance
1
OM-173
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