Shielding Gas Hookup - Lincoln LN-742 Service Manual

A-8

SHIELDING GAS HOOKUP

WARNING
Gas under pressure is explosive.
Always keep gas cylinders in an
upright
undercarriage
support. See American National
Standard Z-49.1, "Safety In Welding
And Cutting", published by the
American Welding Society.
t
GAS
HOSE
INERT
GAS
FITTING
INSTALLATION
position and to the
or a stationary
FIGURE A.6 – SHIELDING GAS HOOKUP.
LN-742 & LN-742H
Customer must provide a cylinder of shielding gas, a
pressure regulator, a flow control valve, and a hose
from the flow valve to the gas inlet fitting of the LN-742.
Install per Figure A.6 and the following:
1. Connect the supply hose from the gas cylinder
flow valve outlet to the 5/8-18 female inert gas
fitting on the back panel of the LN-742.
2. Install the barbed fitting and union nut to the
5/8-18 female inert gas fitting on the front of the
LN-742. Connect 3/16 in. (4.8 mm) I.D. gas hose
from the gun to the barbed fitting.
When the gun is to be removed, this fitting can be
easily detached by loosening the union nut.
A-8
GAS
SUPPLY
HOSE