Lincoln Electric LN-7 GMA WIRE FEEDERS - Manual (Page 47)

SUBMERGED ARC GUNS
The K112 gun and cable assembly is recommended
for welding with 1/16 in. solid steel electrode at up to
500 amps. The K113 gun and cable is recommended
for 5/64 in. and 3/32 in. (2.0 and 2.4 mm) solid steel
electrodes (types L50, L60, L61, and L70) for use up to
600 amps.
GMAW GUNS
An expanding line of Magnum GMA gun and cable
assemblies are available to allow welding with solid
and cored electrodes using the GMAW process. See
the appropriate Magnum literature for descriptions of
the 100-500 ampere air cooled gun and cables that are
available. Gun cable lengths range from 10 to 25 ft.
(3.0 to 7.5 m) and feed electrode sizes 0.023 in. to
3/32 in. (0.6 to 2.4 mm).
NOTE: Magnum GMA welding guns require a K466-1
connector for use with an LN-7 GMA wire feeder.
K527 WATER SOLENOID KIT
Install and connect per the instructions (M16261)
shipped with the kit.
This kit is factory installed on the K440-1 LN-7 GMA.
K494 LN-7 GAS SOLENOID KIT
(Standard on LN-7 GMA)
Install per the instructions (M16057) shipped with the
kit.
K303 50 TO 60 LB WIRE REEL
MOUNTING STAND
The K303 60 lb Wire Reel Mounting Stand includes
a dust shield. The assembly includes a framework to
which is attached the 50 to 60 lb wire reel, a mounting
spindle, a lift bale, and a cable clamp for fastening the
input cable assembly. It is easily mounted to the basic
wire feed unit by following the Attaching the Wire Reel
Stand procedure at the end of this section.
ATTACHING THE WIRE REEL
STAND
The mounting hardware for mounting the stands is
included with the LN-7 and LN-7 GMA. Screws and
washers are inserted in their respective mounting
holes. To connect:
1. Remove the three 3/8 in. hex head bolts from the
back of the wire feed unit.
2. Place the wire reel mounting stand mounting
bracket in position against the back of the wire
feed unit.
3. Replace and tighten the hex head bolts. The long
screw and plain washer go into the top hole.
For heavy duty welding at up to 450 amps and with
0.068 in. through 3/32 in. Innershield electrode, use an
appropriate K115 or K115-45 gun and cable assembly
(See Figure C.2). Install the proper insulated nozzle
extension and contact tip for the stickout and electrode
size being used.
For welding with 7/64 in. Innershield electrode, use a
K115-3/32 with an M11474-120 nozzle or a K115-45-
3/32 with an M11510-120 nozzle. Also install a 7/64 in.
contact tip and install the insulated nozzle extension
for the stickout being used.
NOTE: Linconditioner TM guns are recommended for
locations where smoke accumulation is a problem and
conventional exhaust systems are ineffective. The
available smoke removal type Innershield guns and
vacuum units can be used in these locations.
Instructions are shipped with the equipment.
FIGURE C.2 – THE K115 and K115-45 GUNS.
C-4 ACCESSORIES C-4
LN-7 & LN-7 GMA