Wacker Neuson 5002004956 Lock Washer

The Wacker Neuson is a genuine OEM Lock Washer designed for a wide range of Wacker Neuson tandem rollers, diesel and gasoline reversible vibratory plate compactors, and vibratory rammers — including the RD7 and RD10 tandem roller series, DPU 4045H, DPU 4545H, DPU 5045H, DPU 5545H, DPU 6055, and DPU 6555H reversible plates, BPU 4045A and BPU 5545A gasoline reversible plates, and BS30, BS45YA, BS52Y, and BS65Y rammers. As a genuine Wacker Neuson part, is produced to the same tolerances and material specifications as the hardware installed on the production line. This Lock Washer installs directly in place of the original, requiring no re-drilling, shimming, or hardware adaptation.

Key Features

• Genuine OEM Hardened Hardware — Manufactured to Wacker Neuson's exact material hardness and dimensional tolerances, ensuring the washer seats flush and delivers consistent locking force under vibration-intensive operation.
• Direct-Fit Replacement — Part number 5002004956 matches the original fastener stack-up across all listed models, dropping straight into the existing bolt or stud position without re-sizing or re-tapping.
• Broad Cross-Family Compatibility — A single part covers RD7 and RD10 tandem rollers, the full DPU 4045H through DPU 6555H reversible plate range, BPU gasoline plates, and BS-series rammers, making it a practical stock item for mixed fleets.
• Vibration Resistance — Engineered to maintain clamp load and resist loosening in equipment that generates continuous high-frequency vibration — the exact environment where a substandard lock washer will back off and allow bolt failure.
• Critical Fastener Integrity — On compaction equipment and rammers, a failed or missing lock washer can allow structural fasteners to loosen mid-operation, creating a safety hazard and accelerating wear on mating components.

A lock washer sits between a fastener — typically a bolt or nut — and the surface it clamps, using its spring tension or toothed profile to resist vibration-induced loosening. On high-vibration equipment like vibratory plate compactors, tandem rollers, and rammers, standard flat washers alone cannot prevent fasteners from gradually backing off during operation. Over time, a worn or missing lock washer allows bolts to loosen, leading to rattling, misalignment, accelerated wear on surrounding components, or outright fastener loss. Replacing a damaged or missing lock washer promptly is one of the simplest and most cost-effective ways to protect the structural integrity of the machine.

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.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.