Gun And Cable Installation; Shielding Gas - Lincoln Electric 350MP Operator's Manual

A-4

GUN AND CABLE INSTALLATION

A Magnum 300 gun and 15Ft.(4.6m) cable are provid-
ed with the POWER MIG
liner for .035-.045" (0.9-1.2 mm) electrode and con-
tact tips for .035" (0.9mm) and .045" (1.2mm) are
included for 15Ft..
WARNING
Turn the welder power switch off before installing
gun and cable.
LINER INSTALLATION AND TRIMMING
INSTRUCTION (SEE FIGURE A.3)
1. Remove the gas nozzle.
2. Remove the gas diffuser from the gun tube.
3. Lay gun and cable out straight on a flat surface.
Loosen set screw of the connector on the back end
of the gun.
4. Insert the untrimmed Liner into the back end of the
gun.
5. Seat Liner bushing into back of gun. Secure Liner
by tightening set screw. Do not install the gas dif-
fuser at this time.
6. Lay the cable straight and trim Liner to 9/16".
Remove burrs.
7. Install insulator and secure the gas diffuser into the
tube.
GUN & CABLE ASSEMBLY INSTALLED
INTO THE POWER MIG
1. Unscrew knurled screw on the drive unit front end
(inside wire feed compartment) until tip of screw no
longer protrudes into gun opening as seen from
front of machine.
BRASS CABLE
CONNECTOR
LINER ASSEMBLY(LINER BUSHING TO BE SEATED
TIGHT AGIANST BRASS CABLE CONNECTOR)
INSTALLATION
350MP. A Magnum cable
®
®
FIGURE A.3
INSULATION TUBE
FEEDER END
CABLE HANDLE
MOLDED GAS PLUG
SET SCREW
POWER MIG
2. Insert the male end of gun cable into the female
casting through opening in front panel. Make sure
connector is fully inserted and tighten knurled
screw.
3. Connect the gun trigger connector from the gun
and cable to the mating receptacle inside the com-
partment located above the gun connection made
in step 2 above. Make sure that the key ways are
aligned, insert and tighten retaining ring.

SHIELDING GAS

(For Gas Metal Arc Welding Processes)
Customer must provide cylinder of appropriate type
shielding gas for the process being used.
A gas flow regulator, for CO
an inlet gas hose are factory provided with the
POWER MIG ® 350MP.
WARNING
CYLINDER may explode if
damaged.
• Gas under pressure is explosive.
Always keep gas cylinders in an
upright position and always keep
chained to undercarriage or sta-
tionary support. See American
National Standard Z-49.1, "Safety
in Welding and Cutting" published
by the American Welding Society.
Install shielding gas supply as follows:
1. Set gas cylinder on rear platform of POWER MIG
350MP. Hook chain in place to secure cylinder to
rear of welder.
2. Remove the cylinder cap. Inspect the cylinder
valves and regulator for damaged threads, dirt,
dust, oil or grease. Remove dust and dirt with a
clean cloth.
Gun Tube
Assembly
.56" (14.2mm)
LINER TRIM
LENGTH
Insulator
350MP
®
A-4
or Argon blend gas, and
2
Gas Diffuser
Contact Tip
Gas Nozzle
®