7-11. Adjusting Optional High Altitude Carburetor

Y A too lean air-fuel mixture can damage valves. Do not adjust main adjustment screw so air-fuel mixture is too lean.

Carburetor can be equipped with an adjustable main jet for operation above 4000 ft (1219 m). Adjust car- buretor as follows:

Start engine and apply nearly full load to welding generator.

1 Main Adjustment Screw

2 Lock Nut

Loosen nut. Turn screw in until en- gine falters (lean air-fuel mixture). Turn screw out until engine runs smoothly, then turn screw out an additional 1/4 turn. Tighten nut.

2

1

Y Stop engine.

 

 

Close door.

Tools Needed:

1/2 in

Ref. ST-159 727-B / Ref. ST-115 155-A

7-12. Troubleshooting

A. Welding

Trouble

Remedy

 

 

No weld output.

Check control settings.

 

 

 

Place optional Output (Electrode) Control switch in On (Hot) position, or move switch to Remote posi-

 

tion and connect remote contactor to Remote 14 receptacle RC3 or terminal strip 3T (see Sections

 

4-7, 4-8, and 5-1).

 

 

 

Check and secure connections to optional Remote 14 receptacle RC3 or terminal strip 3T (see Sec-

 

tions 4-7 and 4-8).

 

 

 

Disconnect equipment from 120 volt ac receptacles during start-up.

 

 

 

Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board

 

PC1.

 

 

Erratic weld output.

Check and tighten connections inside and outside unit.

 

 

 

Use dry, properly-stored electrodes.

 

 

 

Remove excessive coils from weld cables.

 

 

 

Be sure connection to work piece is clean and tight.

 

 

 

Have Factory Authorized Service Agent check brushes and slip rings.

 

 

OM-477 Page 31

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Hobart Welding Products OM-477 manual Adjusting Optional High Altitude Carburetor, Troubleshooting, Welding, Trouble Remedy
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OM-477 specifications

Hobart Welding Products has long been recognized for delivering high-quality welding equipment tailored to the needs of both professionals and DIY enthusiasts. Among its distinguished offerings is the OM-477, a versatile multi-process welder designed to excel in a variety of welding applications. This machine integrates an array of features and technologies that cater to both novice and experienced welders.

One of the defining characteristics of the OM-477 is its multi-process capability, which allows users to perform MIG, TIG, and stick welding with ease. This flexibility makes it an ideal choice for a wide range of projects, from automotive repair to light fabrication tasks. The seamless transition between processes is facilitated by a user-friendly interface that simplifies the selection and adjustment of settings, ensuring a smoother workflow.

The OM-477 is powered by a robust, industrial-grade inverter technology that provides high arc stability and increased energy efficiency. This not only enhances performance but also reduces power consumption, making it an environmentally friendly option. Welders can operate at various output ranges, accommodating different materials, including mild steel, stainless steel, and aluminum, thus ensuring versatility in project execution.

Another notable feature of the OM-477 is its portability. Weighing in at a manageable size, this welder is equipped with a durable carry handle, allowing for easy movement between job sites or within the workshop. This characteristic complements its user-friendly setup, making it accessible for individuals of all skill levels.

Safety is a pivotal aspect of the design of the OM-477. It incorporates multiple safety features such as a thermal overload protection mechanism, ensuring that the machine operates well within safe parameters. This is crucial for preventing overheating, thereby extending the welder's lifespan and reducing maintenance costs over time.

Additionally, the OM-477 offers precise control over welding parameters, enabling users to fine-tune their settings for optimal results. Whether tackling thin sheet metal or thicker materials, the welder’s adjustment capabilities ensure a clean, professional finish.

In summary, the Hobart OM-477 stands as a testament to innovative welding technology, combining multi-process functionality, inverter efficiency, portability, and safety into a single machine. It is a reliable tool designed to empower welders at any skill level, making it a worthy addition to any welding arsenal. With the OM-477, Hobart Welding Products continues to champion quality and user satisfaction in the welding industry.
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