Lincoln Viking 1740 Outside Lens Gasket Seal

Restore Your Helmet's Integrity

Is your Lincoln Viking 1740 letting dust in behind the glass? It might be time to replace the gasket. The Lincoln Outside Lens Replacement Seal (9SS27978-58) is the factory-correct replacement part you need to keep your helmet functioning like new. As a welder, your vision is your most important tool. If smoke, soot, or grinding dust sneaks past your front cover lens, it settles on your auto-darkening filter, causing a hazy view that no amount of wiping the front lens will fix.

This replacement seal is designed to sit snugly between the helmet shell and the outside cover lens. It acts as the primary defense against the intrusion of airborne particulates. Whether you are stick welding in a dusty field or MIG welding in a fabrication shop, this seal works to keep the internal components of your helmet pristine. A compromised seal can lead to "ghosting" or fogging inside the lens assembly, which is frustrating and dangerous when trying to maintain a steady arc.

Don't wait until your ADF is damaged to check your seals. We recommend inspecting the lens seal every time you change your cover plate. If it looks flattened, brittle, or torn, swap it out with this genuine Lincoln 9SS27978-58 seal. It is a small investment that pays off by keeping your optics sharp and your helmet reliable. Get back to welding with confidence, knowing your gear is sealed up tight against the elements.

Why Choose Genuine Lincoln Seals?

• Durability: Made from high-quality materials resistant to heat and drying.
• Performance: Ensures the cover lens snaps in securely and stays in place.
• Peace of Mind: Protects the most valuable part of your welding hood.