Lincoln Electric Magnum PRO 350 Operator's Manual page 7

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GENERAL DESCRIPTION
The MAGNUM PRO 350, 450 AND 550 DP (DUAL
®
PROCEDURE) and DS (DUAL SCHEDULE) 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.
MAGNUM PRO DP and DS guns and cables are
®
specifically designed for use with wire feeders with
dual procedure capabilities. The MAGNUM
450 and 550 DS guns are equipped with a two posi-
tion 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, Dual Procedure only. The MAGNUM
PRO 350, 450 and 550 DP gun and cable are also
designed for use with wire feeders with dual proce-
dure capabilities. The guns are equipped with a rocker
switch that is used to select one of two welding proce-
dures. The Magnum PRO guns are manually guided
and air cooled.
The MAGNUM PRO DP and DS are designed for
®
use with K466 connector kits. The proper connector
can be installed the same as with any MAGNUM
PRO CURVE Guns. The gun control cable connec-
tions however must be tailored to each specific
machine. The MAGNUM
®
nectors that will mate with any Lincoln -10 series wire
feeder.
The MAGNUM PRO DP and DS 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
®
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 MAGNUM PRO DP and DS 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 Magnum
to connect MAGNUM PRO guns directly to a variety
®
of Miller wire feeders. K3159-1 control cable assembly
is required.
The K466-7 connector kit allows connection of MAG-
NUM PRO DP and DS guns to Hobart Series 2000
®
Wire Feeders.
MAGNUM
GENERAL DESCRIPTION
PRO 350,
®
®
®
PRO DP and DS have con-
Fast-Connect Gas Tube Kit
®
connector kit, it is possible
®
PRO 350, 450 AND 550 DUAL PROCEDURE & DUAL SCHEDULE
®
The K466-8 connector kit allows connection of MAG-
NUM PRO DP and DS guns to an LN8 or LN9 when
®
1/16 and larger electrode is used.
The K466-10 connector kit allows connection of MAG-
NUM PRO DP and DS guns to a 10 Series wire feed-
®
er.
The MAGNUM PRO DP and DS gun and cable
®
assemblies are fully compatible for use with compara-
ble Tweco gun size tips, diffusers, gas nozzles, and
cable liners. The Magnum
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.
WARNING
• Do not touch electrically live parts
such as output terminals or internal
wiring
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GMA gun family offers an
®