Bomag 05542281 Reducing Union

The Bomag 05542281 Reducing Union is a genuine OEM component designed for Bomag BW-series tandem rollers and single drum rollers, including the BW 202 AD-2, BW 213 D-3, BW 177 D-3, BW 164 AD, and BW 141 AD-2, among others. As a direct OEM replacement sourced from Bomag, this reducing union matches the original specification for a straight-swap installation with no adaptation needed on compatible machines. This part covers an extensive range of BW tandem rollers and BW single drum rollers, giving fleet operators and service technicians a single verified part number 05542281 to order across multiple machine configurations. Keep your hydraulic or fluid lines operating at the correct flow parameters by replacing worn or damaged fittings with the right component the first time.

Key Features

• Genuine OEM Construction — manufactured to Bomag's original thread pitch, material grade, and dimensional tolerances, ensuring the union seals and holds pressure exactly as the original fitting did
• Direct-Swap Installation — matches the original port sizing and thread form on compatible BW tandem and single drum rollers, threading in cleanly without rework to fittings or lines
• Broad BW-Series Coverage — fits a wide range of Bomag tandem rollers including the BW 151 AD-2, BW 154 AD-2, BW 161 AD-2, BW 164 AD-2, and BW 202 AD-2, as well as single drum rollers including the BW 177 D-3, BW 213 D-3, BW 213 DH-3, BW 216 D-3, BW 219 DH-3, BW 225 D-3, and C 850 C, among others
• Leak-Free Fluid Routing — a correctly fitted reducing union maintains sealed, pressure-rated connections between lines of differing diameters; a failing or cross-threaded union risks fluid loss, pressure drop, and downstream component damage
• Verified Part Number Fit — ordering by Bomag part number 05542281 confirms you receive the correct reducer for your specific BW roller variant, eliminating guesswork when sourcing replacement hydraulic fittings

A reducing union is a threaded hydraulic or fluid-line fitting that connects two lines of different diameters, allowing fluid to pass from a larger-bore line into a smaller-bore line — or vice versa — without leakage or pressure loss. In Bomag rollers, these fittings are used within the hydraulic and fluid systems to route flow between components that operate at different line sizes. When a reducing union becomes corroded, cross-threaded, or cracked, it can cause slow fluid leaks, reduced system pressure, or complete line failure, which interrupts compaction work and can lead to broader hydraulic system damage if left unaddressed. Replacing a worn fitting promptly with the correct OEM part restores a sealed, rated connection and protects the integrity of the surrounding hydraulic circuit.

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.