Manual

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MIG welding requires an appropriate bottle of shielding
gas. For mild steel either a cylinder bottle of Ar/CO
2
or
100% CO
2
can be used refer to the following instruc-
tions to properly connect shielding gas to the machine.
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75/25
FEMALE END
MALE END
CO
S19298
REGULATOR
ADAPTER
PLASTIC
WASHE R
MIXES
100%
2
3. Attach the flow regulator to the cylinder valve and
tighten the union nut securely with a wrench.
!"' If connecting to 100% CO
2
cylinder, a CO
2
regulator adapter is required. Purchase separately
S19298 CO
2
adapter be sure to install plastic washer
included in the fitting on the bottle side.(See Figure
B.13 )
4. Refer to Figure B.13. Attach one end of inlet gas hose
to the outlet fitting of the flow regulator and tighten the
union nut securely with a wrench. Connect the other
end to the machine Solenoid Inlet Fitting (5/8-18
female threads — for CGA — 032 fitting). Make cer-
tain the gas hose is not kinked or twisted.
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1. Secure the cylinder to a wall or other stationary
support to prevent the cylinder from falling over.
Insulate the cylinder from the work circuit and earth
ground. Refer to Figure B.13.
2. With the cylinder securely installed, remove the
cylinder cap. Stand to one side away from the out-
let and open the cylinder valve very slightly for an
instant. This blows away any dust or dirt which may
have accumulated in the valve outlet.
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1. For CO
2
, open the cylinder very slowly. For argon-
mixed gas, open cylinder valve slowly a fraction of a
turn. When the cylinder pressure gauge pointer stops
moving, open the valve fully.
2. Set gas flow rate for 30 to 40 cubic feet per hour (14
to 18 I/min.) under normal conditions, increase to as
high as 40 to 50 CFH (18 to 23.5 I/min.) under drafty
(slightly windy) conditions.
3. Keep the cylinder valve closed, except when using
the machine.
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