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GENERAL DESCRIPTION
MAGNUM 300 & 400
A-1A-1
GENERAL DESCRIPTION
The Magnum™ 300 amp and 400 amp GMA gun and
cable assemblies have been designed to meet NEMA
specification EW3 for welding with steel electrode
using the GMAW (gas metal arc welding) and gas-
shielded FCAW (flux-cored arc welding) processes.
Most models of Magnum 300 and 400 guns are not
factory equipped with a feeder end connector, except
K1802-1 and K2286-1, (they have a factory installed
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 feed-
ing .052 and smaller electrodes. An optional K481
Magnum Fast-Connect Gas Tube Kit is available to
provide tool-less gas tube connection to Lincoln wire
feeders. Non-GMA model wire feeders require an
optional gas solenoid valve.
The 300 and 400 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 300 and 400 guns
directly to a variety of Miller and Hobart wire feeders,
respectively.
The K466-5 connector kit allows connection of
Magnum 300 and 400 guns to an L Tec feeder con-
nector assembly. L-Tec feeders require a feeder con-
nector 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 300 and 400 guns to a Lincoln Wirematic.
The K466-7 connector kit allows connection of
Magnum 300 and 400 guns to Hobart Series 2000
Wire Feeders.
The K466-8 connector kit allows connection of
Magnum 300 and 400 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 300 and 400 guns to a 10 Series wire feeder.
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 OS70
or OS71 Lincoln Outershield cored electrodes for the
gas-shielded FCAW process.
• Do not touch electrically live parts
such as output terminals or inter-
nal wiring
------------------------------------------------------------------------
WARNING