3-In. Wire Feed Liner; Curved Wire Guide - ESAB MT-400EHD Instructions For Use Manual

11. Install tip adaptor wrench tight to seat the liner.
Then tighten the setscrew in the curved wire guide
with the supplied 5/64-in. (2mm) hex key. Do NOT
overtighten.
12. Install and tighten proper size contact tip with a
pair of pliers.
13. Install push-on nozzle. A slight rotating motion will
help slide the nozzle past the friction rings and O-
ring.
4.5 0.023-IN. WIRE FEED LINERS
To install liner and support liners into the torch, use the
following procedure (refer to Figure 4.4):
1. Remove nozzle, contact tip, tip adaptor (999452)
and front insulator (999474). Back out setscrew
in wire guide until it is flush with wire guide
O.D. (This setscrew must remain in wire guide to
prevent loss of shielding gas.)
2. Lay torch out straight and insert support liner
(999797) from inlet end of torch. Seat liner end
fitting firmly into torch inlet.
3. Snip off excess support liner protruding from wire
guide so that it is flush with end of wire guide.
4. Remove the support liner and cut off an additional
1/2-in. (13mm). Deburr and reinstall in torch.
Tighten setscrew in torch inlet fitting. Do not tighten
setscrew in wire guide.
5. With torch laying straight, insert inner liner (999743)
from torch wire guide end. Push liner in all the
way until the small brass liner fitting seats firmly
Figure 4.4 - Installing 0.023-in. Inner and Support Liners
against the end of the wire guide. Reinstall front
insulator and tip adaptor.
6. Excess liner should be extending from torch inlet
end. Tighten setscrew in the support liner fitting to
lock inner liner in place. Leaving 3/8-in. of inner
liner extending from support liner fitting, snip off
excess and deburr.
7. Install contact tip and tighten with a pair of pliers.
8. Install nozzle. A slight rotating motion may be re-
quired for sliding the nozzle past the friction rings
and O-ring.

4.6 CURVED WIRE GUIDE

To replace the curved wire guide (21064) proceed as
follows:
1. Remove the nozzle, contact tip, tip adaptor, nozzle
adaptor, front insulator, liner and shoulder ring.
2. Remove the switch housing (998858) (refer to Sec-
tion 4.6) which will expose a hex-section on the
torch body.
3. Remove the handle end cap and wire guide insu-
lator unless the insulator is being replaced. The
insulator should be replaced if torch has been in
service for an extended period.
4. Place the wire guide in a vise. Using an adjust-
able wrench, turn the torch body counterclockwise
to unscrew the wire guide.
5. Reassemble components in reverse order.
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