Nozzles; Wire Feed Liner (Except 0.023-In. Liner) - ESAB MT-400EHD Instructions For Use Manual

4.3 NOZZLES

IMPORTANT
Do not hammer torch or nozzle to remove spatter.
Spatter can be removed from the inside of the nozzle
with a hand reamer or file. Adherence of spatter can
be minimized and removal made easier by coating the
inside of the nozzle with No. 65 Nozzle Anti-Spatter
Compound.
4.4 WIRE FEED LINER (Except 0.023-in liner, see
Section 4.4)
To remove liner for cleaning or replacement, proceed
as follows:
1. Remove nozzle, contact tip, tip adaptor and front
insulator.
2. Loosen the setscrews in the curved wire guide
(through hole of front insulator, 999474) and the
cable inlet fitting (see Fig. 4) with a 5/64-in. hex-
key.
3. Lay the torch cable out relatively straight. Rotate
the cable inlet fitting counterclockwise a few turns
which should force the liner to slip out of the fitting
slightly. You should then be able to grab the end of
the liner by hand and pull it out of the torch keep-
ing the cable relatively straight while pulling.
4. Be sure to wear proper eye and face protection.
Blow out metallic chips, grit, etc. from the liner
and the handle and cable assembly with com-
pressed air.
NOTE: Direct the initial blast of air away from the
parts to clear moisture that occasionally
accumulates in compressed air lines.
5. Inspect the small gas sealing O-ring on the inlet
ferrule. Replace it if damaged. Make sure the O-
ring is properly located in the groove.
6. Remove all burrs from the O.D. of the liner's bare
spring end (particularly if installing a new liner) to
prevent snagging while pushing the liner through
the cable.
7. With the torch cable laying straight, insert the bare
end of the liner into the cable inlet fitting. Then
push the liner slowly through the cable. To pre-
vent possible kinking of the liner, it is recom-
mended to push it in no more than 150 mm (6-in.)
at a time. An occasional slight whip-snapping of
the inlet flex support will also facilitate liner instal-
lation is illustrated below.
8. After seating the liner ferrule fully into the cable
inlet fitting, lock the liner in place by tightening the
setscrew in inlet fitting. If setscrew is not tightened,
liner may shift in service causing gas to leak. Do
NOT overtighten.
9. If installing a used liner, it should extend beyond
the end of the curved wire guide 3/8 to 7/16-in (9
to 11mm). If short rotate the torch handle in the
counter clockwise direction as illustrated below
(white arrow) to force the liner to extend more. If
liner is extending excessively, then rotate the
handle in the clockwise direction (dark arrow).
10. If installing a new replacement liner, it should be
extending several inches past the curved wire
guide. Proceed as follows:
a. Snip off excess liner with a sharp cutting tool
so that the liner extends 3/16-in. to 1/4-in. (5-
6mm) from the face of the nozzle adaptor.
b. Remove any sharp burrs on end (O.D. and I.D.)
of the spring liner. Burrs could cause wire to
bind during the feeding or the liner to sag dur-
ing reinstallation into the torch.
SETSCREW
5-6 MM
(3/16" - 1/4")
14