Wacker Neuson 5100011815 Tank Cap

The Wacker Neuson Tank Cap is a genuine OEM tank cap designed for the RD18, RD24, RD27, RD28, RD40, and RD45 series tandem rollers. As a direct OEM replacement sourced from Wacker Neuson, part is manufactured to the same specifications as the original component that left the factory, ensuring a proper seal every time. This cap covers an extensive compatibility range across standard, C, O, DPF, and electric-variant configurations, including US and SE market models, making it one of the most broadly applicable service parts in the RD roller lineup.

Key Features

• OEM Sealing Integrity — Engineered to deliver the same compression fit and thread engagement as the original cap, maintaining a secure, leak-free closure on the tank.
• Direct Drop-In Replacement — Matches the original thread pitch and cap diameter for a straightforward swap with no rework or adaptation needed on the tank opening.
• Broad RD Series Compatibility — Fits RD18, RD24, RD27, RD28, RD40, and RD45 tandem rollers across standard, C, O, DPF, and electric (e) variants, as well as US, SE, and .3-generation models.
• Prevents Fluid Loss and Contamination — A properly seating tank cap keeps fuel or fluid contained and blocks dirt, debris, and moisture from entering the tank — protecting downstream components and preserving fluid integrity on the worksite.
• Fuel System Safety — A damaged or ill-fitting cap can lead to spills or vapor escape near hot machine surfaces. Using the correct OEM cap helps maintain a properly sealed fuel system in line with safe equipment operation practices.

The tank cap serves as the primary closure for the fluid tank on Wacker Neuson tandem rollers, creating a sealed barrier that keeps fuel or hydraulic fluid contained during operation, transport, and storage. When the cap is worn, cracked, or missing its seal, it can allow contaminants into the tank or permit fluid to leak, which can degrade performance and damage sensitive system components over time. Replacing a failed cap promptly with the correct OEM part — such as the Wacker Neuson 5100011815 — is a simple but critical step in maintaining the integrity of the machine's fluid system.

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.