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INSTALLATION
MAGNUM® 400 DUAL PROCEDURE GUNS
A-1
GENERAL DESCRIPTION
The Magnum®™ 400 DP Dual Procedure GMA gun
and cable assemblies have been designed to meet
NEMA specification EW3 for welding with steel elec-
trode using the GMAW (gas metal arc welding) and
gas-shielded FCAW (flux-cored arc welding) process-
es. Magnum® 400 DP guns and cables are specifical-
ly designed for use with wire feeders with dual proce-
dure capabilities. The K574 gun is equipped with a
two position trigger. Pulling the trigger in part of the
way will engage the first procedure set at the feeder.
Pulling the trigger the rest of the way will engage the
second procedure. An interlocking trigger is available
as a parts order. The K1722 Magnum® 400 DP Dual
Proecdure gun and cables are also designed for use
with wire feeders with dual procedure capabilities. The
guns are equipped with a rocker switch that is used to
select one of two welding procedures.
The K574 and K1722 are designed for use with K466
connector kits. The proper connector can be installed
the same as with any Magnum® Gun. The gun con-
trol cable connections however must be tailored to
each specific machine. The K574 comes with control
wires but no specific connectors are provided. The
K1722 has a connector that will mate with any Lincoln
-10 series wire feeder.
The Magnum® 400 DP guns are not factory equipped
with a feeder end connector. With the K466-1
Magnum® Connector Kit, they can be used with any
Lincoln LN-7 or LN-25 semiautomatic wire feeder. The
K466-1 should also be used with the LN-8 or LN-9
when feeding .052 and smaller electrodes. An optional
K481 Magnum® Fast-Connect Gas Tube Kit is avail-
able to provide tool-less gas tube connection to
Lincoln wire feeders. Non-GMA model wire feeders
require an optional gas solenoid valve.
The 400 DP guns can also be used with any wire
feeder equipped with a Tweco® #1, 2, 3, 350 or 4 wire
feed adapter kit by using the K466-2 Magnum®
Connector Kit.
With the K466-3 or K466-4 Magnum® connector kits,
it is possible to connect Magnum® 400 guns directly
to a variety of Miller and Hobart wire feeders, respec-
tively.
The K466-5 connector kit allows connection of
Magnum® 400 DP guns to an L Tec feeder connector
assembly. L-Tec feeders require a feeder connector
assembly (similar to a Tweco® adapter) in order to
connect to a gun and cable. The K466-5 contains a
brass connector to permit Magnum® guns to be con-
nected to this feeder connector assembly.
The K466-6 connector kit allows connection of
Magnum® 400 DP guns to a Lincoln Wirematic.
The K466-7 connector kit allows connection of
Magnum® 400 DP guns to Hobart Series 2000 Wire
Feeders.
The K466-8 connector kit allows connection of
Magnum® 400 DP guns to an LN8 or LN9 when 1/16
and larger electrode is used.
The K466-9 connector kit allows connection of K497
to SP100T and related wire feeders.
The K466-10 connector kit allows connection of
Magnum® 400 DP guns to a 10 Series wire feeder.
The Magnum® 400 DP gun and cable assemblies are
fully compatible for use with comparable Tweco gun
size tips, diffusers, gas nozzles, and cable liners. The
Magnum® GMA gun family offers an expanding line of
quality, long life, expendable replacement parts and
accessories.
For best results when welding mild and alloy steels, it
is recommended that L-50 or L-56 Lincoln solid wire
electrodes be used for the GMAW process and
Lincoln Outershield cored electrodes for the gas-
shielded FCAW process.
• Do not touch electrically live parts
such as output terminals or internal
wiring
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WARNING