Maintaining The Contact Tip; Maintaining The Nozzle - Craftsman 934.205592 Operator's Manual

16. Insert a new plastic cable tie in
place around the cable and tighten
it in approximately the same
location as the plastic cable tie that
was cut in step 8.
17. Return all components to the
handle casing and realign them as
they were originally.
18. With both halves of the handle
case in place, tighten the four
Philips pan head screws making
sure the trigger remains seated in
place.
19. Push the cable into the welder far
enough so that the end of the gun
liner protrudes through the inlet
guide tube end of the wire-feed
torch clamp far enough so that it is
within approximately 1/16 inch of
touching the drive roller.
20. Make sure the cable covering
(tubing) is far enough in the
machine so that it is covered by the
wire-feed torch clamp.
21. Tighten the two 1_ inch hex head
screws (may also be tightened by a
straight blade screwdriver) and one
pan head Phillips screw to the
drive roller securing the gun in
place.
22. Re-install the welding wire
according to INSTALL THE
WELDING WIRE.
MAINTAINING THE CONTACT TIP
The purpose of the CONTACT TIP is to
transfer welding current to the welding
wire while allowing the wire to pass
through it smoothly.
Always use a contact tip stamped with
the same diameter as the wire it will be
used with.
If the wire burns back into the tip,
remove the tip from the gun and
clean the hole running through it
with an oxygen-acetylene torch tip
cleaner or tip drill.
2,
Over time, the hole in the contact
tip will become worn by the wire
passing through it. The more worn
this hole becomes, the less efficient
is the transfer of welding current to
the wire and eventually arc
breakage and difficult arc starting
will result. Replace contact tips
when signs of wear become
apparent.
MAINTAINING THE NOZZLE
The nozzle directs the shielding gas to
the weld puddle, determines the size of
the shielding area, and prevents the
electrically hot contact tip from
contacting the work piece.
CAUTION
KEEP THE NOZZLE CLEAN! During
the welding process, spatter and slag
will build up inside the nozzle and
must be cleaned out periodically.
Failure to clean and/or replace the
nozzle in a timely fashion WILL
CAUSE DAMAGE TO THE FRONT-
END OF THE GUN ASSEMBLY.
For best results, coat the inside of a new
or freshly cleaned nozzle with anti-stick
spray or gel.
1. Stop welding and clean any
accumulated slag or spatter from
the nozzle every 5 to 10 minutes of
welding time.
2. When welding overhead, if any
molten metal drips from the weld
puddle and falls into the nozzle,
STOP WELDING IMMEDIATELY
and clean the nozzle.
3,
If the slag cannot be thoroughly
cleaned from the nozzle,
REPLACE THE NOZZLE!
Failure to keep the nozzle adequately
cleaned can result in the following
problems:
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