Wacker Neuson 5100011978 Membrane

The Wacker Neuson 5100011978 is a genuine OEM Membrane designed for the full RD-series tandem roller lineup, including RD18, RD24, RD27, RD28, RD40, and RD45 models. As a direct factory replacement, this membrane meets the same material and dimensional standards as the original part, ensuring it seats and seals exactly as intended within the hydraulic or fuel system circuit it serves. Compatibility spans a wide range of RD configurations — standard, combination, open-ROPS, canopy, and DPF-equipped variants — making 5100011978 the correct choice across the majority of the RD tandem roller family. Genuine OEM sourcing means no guesswork on material grade or fit when restoring your machine to full operation.

Key Features

• Genuine OEM Material Integrity — Manufactured to Wacker Neuson's original compound and thickness specifications, ensuring the membrane flexes and seals under the same pressure cycles as the factory-installed component.
• Direct Drop-In Replacement — Matches the original mounting profile and port geometry, allowing straightforward installation without trimming, shimming, or adaptation.
• Broad RD-Series Coverage — Confirmed fitment across RD18, RD24, RD27, RD28, RD40, and RD45 tandem rollers, including DPF, canopy, open-ROPS, and combination-drum configurations.
• Maintains System Pressure and Flow — A sound membrane keeps fluid circuits properly isolated and responsive; a cracked or fatigued membrane leads to pressure loss, erratic system behavior, or fluid contamination.
• OEM Part Number Traceability — Part number 5100011978 is the Wacker Neuson factory reference, so you can cross-check against your machine's parts manual with confidence before ordering.

A membrane acts as a flexible barrier within a fluid circuit — separating two media, absorbing pressure pulses, or transmitting mechanical force without allowing fluid to cross between chambers. In tandem rollers like the RD series, membranes commonly appear in hydraulic control circuits, fuel delivery systems, or vibration-related pump assemblies, where they allow pressure to transfer while preventing contamination between sides. When a membrane develops a crack, pinhole, or loss of elasticity, the system it serves can suffer from weak or inconsistent response, fluid bypass, or outright circuit failure — making timely replacement essential to keeping the roller's compaction and drive functions operating correctly.

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.