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Gun
Cable
Plastic
Cable Tie
Cable
Switch
Handle
Case
Live Wire
Terminal
Gas
Hose
Gas
Hose
Fitting
Conduct.or
Gas
Valve Tube Insulation
internalStar
Lockwasher
Head End
Gun Liner
Figure 10.
Tools Required:
• 5/16 inch open end wrench
• Crescent Wrench (6 or 8 inch)
• 9 mm open end wrench (or 3 inch
crescent)
• Phillips Screwdriver
° Straight Blade Screwdriver or _A inch
hex driver
2,
3.
Turn OFF welder POWER SWtTCH
Open the welder side panel,
Loosen the tension arm and lift it
up off the drive roller.
4, Turn the wire spool counter-
clockwise (be sure to hold onto the
wire itself while turning the spool or
the wire will unspool itself when it
becomes free of the gun liner),
removing wire from gun assembly.
5,. Remove two _A inch hex head
screws (may also be removed with
a straight blade screwdriver) and
one pan head Phillips screw (inlet
guide tube end) from the drive
roller and lift away the strain relief
clamp that holds the tail end of the
gun in the drive assembly.
6,, Leave the gun assembly (consists
of nozzle, gas diffuser, goosemeck,
handle and cable containing gas
tubing electrical cable and liner)
attached to the welder but move
the welder to a place where the
18
Gun Assembly
7
8
g,,
10
Note:
11
gun assembly can be laid out
straight on a table or workbench or
similar flat surface.
Unscrew and remove the nozzle,
With a crescent wrench (six or eight
inch), turn the gas diffuser
clockwise (has left hand threads)
and remove the gas diffuser (and
contact tip together) from the
conductor tube on the end of the
gun,
Remove the four Phillips head
screws that hold the handle case
together, With the exception of the
trigger, completely remove the
contents of the handle case,
Cut the plastic cable tie away from
the cable covering (tubing).
In the following procedure step,
it may be necessary to remove
the gas fitting from the gas
valve in order to make room to
turn out the head end of the
gun liner..
With a 5/16 inch open end wrench,
unscrew the head end of the liner
from the gas valve Save the
internal star lock_washer and note
the orientation of the live wire
terminal. If you find it necessary to
remove the gas hose connector,
press down on the ring at the rear
of the gas fitting to release the gas
lnose and pull out the gas hose.
Remove the gas fitting with a 9 mm
open end wrench or three inch
crescent.
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