Bomag 05542288 Reducing Union

The Bomag 05542288 Reducing Union is a genuine OEM component designed for an extensive range of Bomag pavers, rollers, cold milling machines, recyclers/stabilizers, and compactors. Sourced directly from Bomag, this reducing union delivers the exact dimensions and thread specifications required for a correct hydraulic or fluid-line connection across compatible equipment. This part fits a broad cross-section of Bomag machines, including BF-series pavers such as the BF 300 P and BF 600 P-3 S 500, BW-series tandem and single drum rollers including the BW 213 DH-5 and BW 174 AP-4, BM-series cold milling machines such as the BM 1000/35 and BM 2000/60, MPH and RS-series recyclers/stabilizers, and BC-series refuse/landfill and soil compactors. When a fluid-line fitting fails or leaks, using part number 05542288 ensures the connection is restored to the correct specification without improvised adapters or mismatched fittings.

Key Features

• Genuine OEM Thread and Bore Integrity — machined to Bomag's exact reducing union specification, ensuring the step-down between two different line sizes seals correctly and holds under operating pressure
• Direct Drop-In Connection — threads and port dimensions match the original fitting position, so this union installs without re-tapping, re-threading, or sourcing supplementary adapters
• Broad Cross-Fleet Coverage — fits Bomag BF-series pavers, BW-series tandem and single drum rollers, BM-series cold milling machines, MPH/RS-series recyclers/stabilizers, BPR reversible vibratory plates, BC-series refuse/landfill and soil compactors, and BW walk-behind and pneumatic tyred rollers, including the BW 213 D-5, BF 800 C-3 S 600, BM 2500/75, and many more
• Leak-Free Fluid Routing — a correctly fitted reducing union maintains system pressure and prevents fluid loss that would otherwise cause erratic hydraulic response, overheating, or unplanned shutdowns
• Fuel and Hydraulic System Integrity — using the correct OEM union in fuel or hydraulic lines eliminates the risk of fitting failure under pressure, which is critical for operator safety and compliant machine operation

A reducing union is a threaded fitting that joins two fluid lines of different diameters, stepping down the port size while maintaining a sealed, pressure-rated connection. In Bomag equipment, these unions appear in hydraulic circuits, fuel delivery lines, and ancillary fluid systems where hose or pipe diameters change between components. When a reducing union cracks, corrodes, or develops thread damage, the resulting leak disrupts fluid pressure, contaminates surrounding components, and can create a fire risk in fuel-adjacent applications — making prompt replacement with the correct part essential.

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.

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