Lincoln Electric MAGNUM 400 DUAL PROCEDURE IM646-A - Manual (Page 13)

A-6 INSTALLATION A-6
CONTACT TIP AND GAS NOZZLE INSTALLATION
a. Choose the correct size contact tip for the elec-
trode being used (wire size is stenciled on the side
of the contact tip) and screw it snugly into the gas
diffuser.
b. Be sure the nozzle insulator is fully screwed onto
the gun tube and does not block the gas holes in
the diffuser. (NOTE: Insulator is not required when
using the optional fixed gas nozzles.)
c. Slip the appropriate gas nozzle onto the nozzle
insulator. Adjustable gas nozzles are available with
a .62” (15.9 mm) or .50” (12.7 mm) I.D., and in both
standard (flush) and recessed design. The proper
nozzle should be selected based on the welding
application. Different length fixed nozzles are also
available to fit 400 amp gun tubes to allow either
spray or short-circuiting transfer welding.
Choose the gas nozzle as appropriate for the
GMAW process to be used. Typically, the contact
tip end should be flush to .12” (3 mm) extended for
the short-circuiting transfer process and .12” (3
mm) recessed for spray transfer and for the
Outershield7 (FCAW) process.
CONNECTION TO FEEDER
NOTE: The K574 Magnum® 400 DS is shipped with
generic gun control cables, therefore Section (c) will
not apply. The gun control cables must be tailored, by
the user, to each specific wire feeder. The cables are
identified as procedure 1 and 2.
To install on Lincoln wirefeeders equipped with a dual
procedure kit, connect the cable marked "1" to the 5
pin amphenol located on the feeder case front. The
cable marked "2" should be connected to the 3 pin
amphenol located on the dual procedure box.
CONNECTION TO LINCOLN FEEDERS
Gun cable assemblies which were assembled with a
K466-1 or -8 Connection Kit will connect easily to any
Lincoln LN-9 with a dual procedure kit.
a. Check that the drive roll(s) and feeder guide tubes
are appropriate for the electrode size being used.
b. Fully push the brass connector end of the gun
cable into the conductor block on the outgoing side
of the feeder wire drive. Secure the cable using the
hand screw or set screw in the conductor block.
c. Insert the control cable plug from the gun into the
mating sockets on the wire feeder.
d. Slide the free end of the flexible hose onto the
barbed gas fitting on the front of the Lincoln feeder.
Move the corresponding tubing clamp down near
the end of the tube to assure a good gas seal.
CONNECTION TO ADAPTED FEEDERS
Gun cable assemblies which were assembled with a
K466-2 Connection Kit will connect easily to any prop-
erly adapted feeder.
a. Check that the adapter and feeder outgoing guide,
as well as the drive roll, are appropriate for the
electrode size being used.
b. Fully push the brass connector end of the gun
cable into the brass adapter on the outgoing side of
the feeder wire drive. Secure the cable using the
hand screw or set screw in the adapter.
c. Insert the control cable plug into the mating socket
on the wire feeder.
MAGNUM® 400 DUAL PROCEDURE GUNS