Figure; 5-6. Gun Maintenance - MAC TOOLS MW250 Owner's Manual

5-4.
Gun Maintenance
READ SAFETY BLOCKS at start of
Section 5 before
proceeding.
FLYING METAL CHIPS AND DIRT
can cause
injury and damage equipment.
Point gun away from people and in
a
safe direction when blowing out with
compressed
air.
swamlo.1 1W91
Turn
Off
unit and disconnect input
power.
1 Wire Spool
Cut welding wire off at contact tip.
Retract wire
onto spooi and
se
cure.
2 Gun Securing Knob
Loosen knob and
remove
gun and
trigger plug.
Reassemble gun.
To Reassembe Gun:
Install contact tip.
Insert
new
liner.
Install collet onto liner and
tighten
into gun/feeder connector using
wrench.
Cut liner off
near
collet
so
that liner
end is
as
close
to
drive rolls
as
pos
sible without
touching.
Install nozzle.
Reinstall gun (see Section 3-5).
Thread
welding
wire
(see
Section
3-8).
Close door.
4,
Remove liner.
Tools Needed:
~
3/8in
Figure
5-6. Gun Maintenance
Ref. ST-801 1O1-B/ST-801
149
1
2
I
Remove
nozzle,
contact tip,
and
liner collet.
Blow
out
gun
casing.
Gun/Feeder
Connector
C
/
OM-154 501
Page 16