Lincoln Electric IM541 MAGNUM 450WC Fast-Mate Water-Cooled Gun and Cable - Manual (Page 12)

E-1 MAINTENANCE E-1
MAGNUM 450 WC
MAINTENANCE
Periodically remove and clean the nozzle, contact tip
and gas diffuser. Replace the nozzle insulator if dam-
aged. Regular use of an anti-spatter compound will
reduce the adherence of spatter and ease its removal.
Clean cable liner after using approximately 300
pounds (136 kg) of electrode. Remove the cable from
the wire feeder and lay it out straight on the floor.
Remove the contact tip from the gun. Using an air
hose and only partial pressure, gently blow out the
cable liner from the gas diffuser end.
Excessive pressure at the start may cause the dirt
to form a plug.
Flex the cable over its entire length and again blow
out the dable. Repeat this procedure until no further
dirt comes out.
Gun Tube Replaceable Parts
a. The neck insulation disk should be periodically
examined for wear. To replace the neck insula-
tion disk, remove the diffuser and pull off the
neck insulation disk. Although the neck insula-
tion disk does not have a thread, it can be
unscrewed from the gun tube. Refer to Figure
E.1.
b. The nozzle holder can be replaced if the threads
are damaged. Remove the diffuser and gun
tube insulation (refer to a. and Figure E.1).
Unscrew the fixing nut and pull the nozzle hold-
er off the gun tube assembly. Be careful to not
drop the ceramic that may come off with the
nozzle holder. Examine the insulation cone and
replace if damaged. Coat the inside diameter
and the outside diameter of the ceramic with
DOW CORNING 340 joint compound (Lincoln
part T12837) and place them on the gun tube.
Place the new nozzle holder over the ceramic
and tighten in place with the fixing nut. Replace
the gun tube insulation and the diffuser.
CAUTION
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Figure E.1 Figure E.2