A-7

INSTALLATION

A-7

 

 

 

GMAW SHIELDING GAS HOOKUP

WARNING

Gas under pressure is explosive. Always keep gas cylinders in an upright position and chained to the undercarriage or a stationary support. See American National Standard Z-49.1, “Safety In Welding And Cutting”, published by the American Welding Society.

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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.

The LN-742 can be used with any shielding gas recommended in the electrode’s product literature at a maximum pressure of 60 psi (4.1 bar). This may include gasses such as Argon, Helium and Nitrogen and blended gases such as Ar-He, Ar-N2, Ar-O2,Ar-

CO2, CO2, AR-CO2,-O2.

FIGURE A.6 – SHIELDING GAS HOOKUP.

t

t

GAS

HOSE

INERT

GAS

FITTING

GAS

SUPPLY

HOSE

LN-742 & LN-742H

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Lincoln LN-742H manual Gmaw Shielding GAS Hookup, Figure A.6 Shielding GAS Hookup

LN-742, LN-742H specifications

The Lincoln LN-742H and LN-742 are renowned models in the realm of industrial welding equipment, specifically designed to cater to the needs of professional welders and fabricators. These machines stand out for their robustness, advanced technology, and ease of use, making them popular choices in various industries, including construction, automotive, and manufacturing.

One of the main features of the Lincoln LN-742H and LN-742 is their powerful Arc control capabilities. The machines are equipped with innovative technology that allows for consistent arc stability, which is crucial for achieving high-quality welds. The adjustable arc force enables users to tailor the welding parameters to their specific applications, facilitating optimal penetration and minimal spatter.

The LN-742H model is particularly notable for its enhanced portable design, making it easier for operators to transport the machine to different job sites. This portability does not compromise its power, as it offers a high output suitable for both thin and thicker materials. Moreover, the LN-742 model comes with a highly efficient cooling system that ensures the machine runs smoothly without overheating, even during prolonged use.

Both models feature an intuitive user interface that simplifies the welding process. The digital display offers real-time feedback on the welding parameters, allowing welders to make precise adjustments as needed. This feature is especially beneficial for beginners, who may be unfamiliar with optimal welding settings.

Another impressive characteristic of the Lincoln LN-742H and LN-742 machines is their versatility. They support various welding processes, including MIG, TIG, and stick welding, giving users the flexibility to choose the most suitable method for their projects. This adaptability makes these models an ideal solution for shops that handle a wide range of welding tasks.

Durability is a significant consideration in the design of the LN-742H and LN-742, as they are built with high-quality materials that withstand heavy use and challenging conditions. The rugged construction extends the lifespan of the machines, reducing the need for frequent repairs and servicing.

In summary, the Lincoln LN-742H and LN-742 welding machines exemplify advanced engineering and user-focused design. Their combination of powerful performance, portability, user-friendly features, and versatile applications makes them essential tools for professionals in the welding industry, paving the way for excellence in metal fabrication and repair.