Lincoln Electric Wirematic 255 Replacement Switch Assembly

Professional Grade Replacement Switch for Lincoln Welders

Maintain the operational integrity of your welding fleet with the Switch Assembly for Lincoln Electric Wirematic 255. Identified by SKU 9SS7670, this component is a critical spare part for the repair and maintenance of the Wirematic 255 MIG welder series. The Wirematic 255 is a transformer-based machine that relies on robust electromechanical switches to manage power input and control settings. When these switches fail due to mechanical fatigue or electrical wear, the machine becomes unusable.

This replacement assembly is manufactured to meet strict OEM standards, ensuring it can handle the electrical loads and environmental conditions typical of a welding shop. The switch features durable housing and high-quality contacts designed to resist oxidation and pitting. For technicians and shop managers, using the correct replacement part means less time troubleshooting and more time welding. The 9SS7670 ensures that the pinout and mounting dimensions align perfectly with the Wirematic 255's internal wiring harness and front panel design.

Symptoms of Switch Failure

Diagnosing a bad switch on a Wirematic 255 often involves checking for continuity across terminals when the switch is toggled. Common symptoms necessitating replacement include:

• The machine failing to power on despite having a good input power connection.
• Intermittent operation where the welder cuts out during use.
• A "mushy" or loose feeling when toggling the switch, indicating broken internal springs or mechanisms.
• Audible crackling or visible signs of heat damage on the switch terminals.

By installing this specific switch assembly, you ensure that the safety and control mechanisms of the welder function as intended by the manufacturer. Do not compromise on safety with generic switches; choose the part designed specifically for the Lincoln Wirematic 255.