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D-2
CAUTION
This screw should only be gently tightened.
Overtightening will split or collapse the liner and
cause poor wire feeding.
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6. Replace the nozzle insulator and gas nozzle.
GUN TUBES AND NOZZLES
a. Replace worn contact tips as required.
b. Remove spatter from inside of gas nozzle and from
tip after each 10 minutes of arc time or as required.
c. To remove gun tube from gun, loosen socket-head
clamping screw in handle with 3/16" (4.8 mm) Allen
wrench. Remove gas nozzle and nozzle insulator
and also loosen small set screw in the diffuser
using 5/64" (2.0 mm) Allen wrench.
NOTE: Small set screw in the diffuser must be
loosened, otherwise liner could be damaged when
attempting to remove gun tube.
Pull gun tube out from gun handle. To reinstall,
insert the gun tube, push in as far as possible and
retighten screws.
MAINTENANCE
MAGNUM® 400 FM DUAL PROCEDURE GUNS
GUN CABLES
CABLE CLEANING
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.
CAUTION
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 cable. Repeat this procedure until no further
dirt comes out.
CABLE REPAIR FOR K575 & K1723
MODELS
Magnum® 400 Dual Procedure guns and cables fea-
ture the use of repairable cable connectors. If the
cable ever gets severely damaged, it may be cut
shorter and repaired by the user.
GUN TUBE END CABLE REPAIR FOR
K575
AND K1723
Terminals for K575 or 2 #S19492-2 terminals for K1723)
a) Remove the cable liner per previous instructions.
b) Remove the gun tube per previous instructions.
c) Remove the #6 screws from the gun handle, sepa-
rate the two halves, and remove the cable from the
handle along with the trigger assembly for the
K575 guns. Before removing the trigger assembly,
carefully note trigger lead wiring as it will be impor-
tant to reconnect these properly. For the K1723
also remove the rocker switch.
D-2
(Requires 4 #S8053-169
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