Wacker Neuson 5100011829 Tank Cap with Lock

The Wacker Neuson 5100011829 Tank Cap with Lock is a genuine OEM component designed for the RD and RC series of tandem rollers and single-drum soil compactors. Sourced directly from Wacker Neuson, this cap meets the same specifications as the part originally installed at the factory. It is confirmed to fit a wide range of models across the RD18, RD24, RD27, RD28, RD40, RD45, RC50, RC70, and RC110 families, covering standard, cab, open-ROPS, DPF, and combination drum configurations.

Key Features

• Locking Security Integrated lock mechanism prevents unauthorized access to the fuel tank and reduces the risk of fuel theft or contamination on busy job sites.
• Genuine OEM Construction Manufactured to Wacker Neuson's original material and dimensional specifications, ensuring the cap seals correctly against the tank filler neck without warping or cracking over time.
• Direct Drop-In Replacement Engineered to thread onto the original filler neck exactly as the factory cap did — no adapters or modifications needed to complete the swap.
• Broad Series Coverage A single part number covers RD18, RD24, RD27, RD28, RD40, and RD45 tandem rollers as well as RC50, RC70, and RC110 single-drum soil compactors across multiple configuration variants.
• Fuel System Integrity A properly sealing tank cap prevents debris and moisture from entering the fuel system, protecting injectors and fuel components from contamination-related wear.

The tank cap seals the fuel filler opening on the machine's fuel tank, keeping fuel secure and the tank closed to dust, water, and debris during operation and transport. A failed or missing cap allows contaminants into the fuel system, which can clog filters, damage injection components, and cause unexpected shutdowns on the job. The locking version adds a physical security layer that deters fuel theft — a practical concern on unmanned overnight sites. Replacing a worn, cracked, or lost cap with the correct OEM part restores the fuel system's first line of defense and keeps the machine running on clean, uncontaminated fuel.

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.