Drive Assembly Maintenance; Short Circuit Shutdown - MAC TOOLS MW165 Owner's Manual

C.
Short Circuit Shutdown
If contact
tip is shorted and sticks
to
workpiece, the unit shuts down, but fan
runs.
To
resume
operation, release gun
trigger, turn
Off
unit, and
remove
contact tip
from
workpiece.
Check
contact tip and replace
if
damaged. Turn On unit
to
continue operation.
4-2. Drive
Assembly
Maintenance
_________
READ SAFETY BLOCKS
at start of
Section
4
before
proceeding.
Turn Oft and
unplug unit.
1 WIre Spool
2 Gun Contact lip
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
desired 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
2-7).
Close door.
Tools Needed:
~===-
5/~1
ST.1555C4-A/ST-154
199
Figure 4-2.
Drive Assembly Maintenance
OM-185
356
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