Wacker Neuson 5100011537 Filler Cap

The Wacker Neuson 5100011537 is a genuine OEM Filler Cap designed for a wide range of Wacker Neuson RD tandem rollers and RC single-drum soil compactors. This part covers an extensive fitment list spanning the RD18, RD24, RD27, RD28, RD40, RD45 tandem roller series and the RC50, RC70, and RC110 single-drum soil compactor series, including both standard and padfoot drum variants. As a genuine OEM component, the 5100011537 is manufactured to the exact specifications of the original part it replaces, ensuring a correct, secure fit without modification. Keep this part on hand as a service spare to maintain fluid containment integrity across your compaction fleet.

Key Features

• Genuine OEM Sealing Integrity — Manufactured to the original thread pitch and sealing surface dimensions, ensuring the cap forms a fully leak-free closure on the filler neck every time.
• Direct-Fit Replacement — Installs directly onto the original filler neck with no rework or adaptation; threads engage and seat exactly as the factory-installed cap did.
• Broad Compaction Fleet 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, making it a practical stocking item for mixed fleets.
• Fluid Containment Assurance — A correctly seated filler cap prevents contamination from dirt, debris, and moisture entering the fluid reservoir — contamination that can accelerate component wear and compromise hydraulic or engine performance.
• Fuel and Fluid System Safety — A properly functioning cap maintains the correct pressure environment within the reservoir and prevents spillage or vapor escape, which is essential for safe operation around open-flame or high-heat environments on active compaction sites.

The filler cap seals the fluid reservoir opening on the machine, preventing dirt, water, and debris from entering while also maintaining the correct internal pressure environment required for proper fluid system operation. A damaged, missing, or poorly sealing filler cap allows contaminants into the reservoir, which can degrade hydraulic fluid or engine oil and lead to premature wear of pumps, seals, and internal components. Replacing a worn or cracked cap promptly is one of the simplest ways to protect the broader fluid system on your roller or compactor.

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.