Maintenance; Removal, Installation And Trimming Instructions For Magnum® Liners; Gun Tubes And Nozzles; Gun Cables - Lincoln Electric MAGNUM 400 DUAL PROCEDURE IM646-A Operator's Manual

D-1
REMOVAL, INSTALLATION
TRIMMING INSTRUCTIONS
MAGNUM® LINERS
NOTE: The variation in cable lengths prevents the
interchangeability of liners. Once a liner has been cut
for a particular gun, it should not be installed in anoth-
er gun, unless it can meet the liner cut off length
requirement. Liners used to feed steel wire are
shipped with the jacket of the liner extended the prop-
er amount.
a. Remove the gas nozzle and nozzle insulator.
Loosen the set screw located in the side of the dif-
fuser with 5/64 (2.0 mm) Allen wrench (provided
with the gun or connector kit).
b. Remove the gas diffuser from gun.
c. Lay gun and cable out straight on a flat surface.
For all K466 except K466-3 and K466-4
Connections:
Loosen set screw located in the brass cable con-
nector at the wire feeder end of the cable using the
same 5/64 (2.0 mm) Allen wrench. Pull liner out of
cable. (REFER TO Figure B.1 IN INSTALLATION
FOR EACH)
<OR>
For K466-3 and K466-4 CONNECTIONS:
Remove the connector cap with the wrench provid-
ed. Pull liner out of cable. If the liner is going to be
replaced with a different size liner, loosen set
screw on the connector cap and remove piece of
liner material.
d. For installation and trimming instructions for
Magnum® liners see "LINER INSTALLATION" in
the INSTALLATION section.

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.

MAINTENANCE

AND
FOR

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.
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
CABLE REPAIR FOR K574 & K1722
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
K574
Terminals for K574 or 2 #S19492-2 terminals for K1722)
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-
MAGNUM® 400 DUAL PROCEDURE GUNS
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.
CAUTION
AND K1722
rate the two halves, and remove the cable from the
handle along with the trigger assembly for the
K574 guns. Before removing the trigger assembly,
carefully note trigger lead wiring as it will be impor-
tant to reconnect these properly. For the K1722
also remove the rocker switch.
D-1
(Requires 4 #S8053-169