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viii. Gas Selection
8. ASSEMBLY
Electrical Shock
Electric shock can kill! Always turn the POWER switch OFF and unplug the power cord
from the AC power source before installing wire.
MIG TORCH ASSEMBLY
1. Locate the wing nut retaining bolt inside the front panel on the Drive System (Figure 7). Loosen
the retaining bolt.
Retaining
Bolt
2.
Make note of the retaining groove on the back end of the MIG torch (Figure 7).
NOTE: Slowly open the cylinder valve by turning it counter-clockwise until the
cylinder pressure gauge registers on the first gauge of the regulator. Turn the
adjustment knob clockwise (right) slowly to increase gas flow to 20 CFH. To
reduce the gas flow, turn the adjustment counter-clockwise (left). The gas valve
is located on the back panel of the welder and activated by the trigger. Gas flow
should be heard when the trigger is activated. No gas flow will result in a harsh
arc with excessive spatter; a smooth weld bead will be difficult to obtain. Avoid
unnecessary gas loss by closing the tank valve when finished welding.
Different materials require different shielding gases when MIG welding. (Refer to
the set up chart inside the wire feed compartment.)
Mild Steel: Use 75% Argon and 25% CO2 for reduced spatter and reduced
penetration for thinner materials. DO NOT USE Argon gas concentrations higher
than 75% on steel. The result will be extremely poor penetration, porosity, and
brittleness of weld.
Mild Steel: Use CO2 for deeper penetration but increased spatter. (A CO2
regulator adapter will be needed.)
Stainless Steel: Use a mixed gas consisting of Helium, Argon, and CO2.
Aluminum or Bronze: Use 100% Argon.
Figure 7
Page
15
of 45
Retaining
Groove
1812367-12
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