Wacker Neuson 5100007426 Fan Type Lock Washer

The Wacker Neuson Fan Type Lock Washer is a genuine OEM component designed for the LTN4Y and LTN5Y series light towers, including the LTN4Y, LTN4Y 60 Hz, LTN4Y SA, LTN4Y RH, LTN4Y 120V/60Hz, LTN5Y, LTN5Y SA, LTN5Y CH, LTN5Y UK, LTN5Ya, LTN5Yp, LTN5Yp HD, LTN5Ypk, and LTN4Y ME models. Sourced directly from Wacker Neuson, this is a genuine OEM part — meaning it meets the exact specifications of the original hardware used in production. With broad coverage across the LTN4Y and LTN5Y model families, part number is a straightforward like-for-like swap that restores your fastening assembly to its original configuration.

Key Features

• Genuine OEM Locking Performance — Manufactured by Wacker Neuson to the same specification as the original, ensuring the fan-type tooth profile provides correct grip and vibration resistance in the fastening joint.
• Drop-In Hardware Replacement — Matches the original washer dimensions and tooth geometry, so it seats and torques correctly without rework or modification to surrounding hardware.
• Wide LTN Series Coverage — Fits across the full LTN4Y and LTN5Y light tower families, including SA, RH, CH, UK, 60 Hz, 120V/60Hz, ME, and HD variants.
• Maintains Fastener Joint Integrity — Fan type lock washers resist loosening under sustained vibration; a worn or missing washer can allow fasteners to back out over time, affecting the security of the assembly.
• Verified by OEM Part Number — Cross-reference 5100007426 against your parts manual or service documentation to confirm correct application before installation.

A fan type lock washer — sometimes called a serrated or star lock washer — uses a series of radial teeth that bite into the mating surface and the underside of the fastener head when torqued down. This tooth engagement creates mechanical resistance to rotational loosening, making the washer effective in applications subject to continuous vibration, such as the engine and mast assemblies found on portable light towers. When a lock washer becomes flattened, corroded, or is missing entirely, the clamping force of the fastener joint degrades and the bolt or nut can work loose over time — potentially leading to misalignment or component separation during operation.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

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