Wacker Neuson 5100012091 Reducing Piece

The Wacker Neuson Reducing Piece is a genuine OEM component designed for the RD and RC Series tandem rollers and single drum soil compactors, including the RD24-100, RD27-120, RD28-120, RD40-130, RD45-140, RC50, and RC70 model families. As a direct OEM replacement, this part is produced to the same specifications as the original, ensuring it seats and connects exactly as intended within your machine's system. Wacker Neuson's genuine parts designation means no guesswork on fitment — the is built to slot in where the original was removed. With an extensive compatibility list spanning both standard, cab, open ROPS, and DPF-equipped variants across multiple model generations, this reducing piece covers a wide range of Wacker Neuson compaction equipment in the field.

Key Features

• Genuine OEM Construction — Manufactured to Wacker Neuson's original dimensional tolerances, ensuring the reducing piece maintains correct flow transition and sealing integrity within the hydraulic or fluid circuit.
• Direct Drop-In Replacement — Engineered to match the original mounting and connection points of part 5100012091, allowing straightforward installation without modification to surrounding components.
• Broad Model Coverage — Compatible with RD24-100, RD27-120, RD28-120, RD40-130, RD45-140, RC50, RC70, and RC70p series machines, including standard, cab, open ROPS, and DPF variants across multiple build generations.
• Preserves System Efficiency — A correctly fitted reducing piece maintains proper fluid or line pressure transitions through the circuit; a failed or mismatched reducer can cause leaks, pressure loss, or erratic machine behavior.
• Sourced Direct from Wacker Neuson — Ordering the genuine OEM 5100012091 means you receive a part that has passed Wacker Neuson's quality controls, backed by the manufacturer's parts program.

A reducing piece is a connector component used to join two lines, ports, or fittings of different sizes within a machine's fluid or hydraulic circuit. Its role is to transition flow smoothly between sections of differing diameter without causing turbulence, pressure drop, or leakage at the connection point. When a reducing piece becomes damaged, corroded, or begins to leak, it can disrupt circuit pressure, lead to fluid loss, and place additional stress on surrounding hoses and fittings — making timely replacement important for keeping the machine's systems operating as intended.

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.