Bomag 05542305 Reducing Union

The Bomag 05542305 Reducing Union is a genuine OEM hydraulic fitting designed for a broad range of Bomag single drum rollers, tandem rollers, refuse and landfill compactors, soil compactors, cold milling machines, recyclers/stabilizers, and pavers. As a direct OEM replacement, this reducing union is manufactured to Bomag's exact specifications, ensuring a proper, leak-free connection between hydraulic lines of differing diameters. Compatible machines include the BW 172 D-2 and BW 142 D-2 single drum rollers, BW 161 AD-4, BW 202 AD-4, and BW 190 AD-4 tandem rollers, BC-series refuse/landfill compactors such as the BC 601 RB, BC 772 RB, and BC 972 RB, cold milling machines including the BM 1000/35, BM 2000/75, and BM 2500/75, recyclers/stabilizers including the MPH 122-2, MPH 125, MPH 600, RS 460, RS 500, and RS 650, and the BF200C 2 paver, among many others. Sourcing genuine OEM components like part number 05542305 is the most straightforward way to maintain hydraulic system integrity across your Bomag fleet.

Key Features

• OEM Hydraulic Precision — Manufactured to Bomag's exact thread form and bore dimensions, ensuring a correctly sealed transition between hydraulic lines without relying on aftermarket tolerances.
• Drop-In Hydraulic Fitment — Threads directly into existing hydraulic ports with the correct taper and sizing, eliminating the need for adapters or secondary fittings during installation.
• Broad Fleet Coverage — Fits an extensive range of Bomag equipment including BW-series single drum and tandem rollers, BC-series refuse/landfill and soil compactors, BM-series cold milling machines, MPH and RS-series recyclers/stabilizers, and the BF200C 2 paver.
• Leak-Free Hydraulic Integrity — A correctly fitted reducing union maintains rated system pressure across the connection point; a worn or improperly sized union risks pressure loss, fluid leaks, and hydraulic system damage.
• Genuine OEM Sourcing — Supplied as a genuine Bomag part, carrying the same material grade and thread specification as the original component fitted at the factory.

A reducing union is a hydraulic fitting that connects two fluid lines of different diameters within a machine's hydraulic circuit, allowing pressurized fluid to pass from a larger-diameter line into a smaller one without leakage or pressure drop at the junction. In heavy compaction and milling equipment, these fittings appear throughout the hydraulic system wherever line sizes must be stepped down to match pumps, valves, motors, or control blocks. When a reducing union fails — through thread wear, corrosion, or cracking — the result is hydraulic fluid loss, degraded actuator performance, and the risk of uncontrolled pressure in adjacent components, making prompt replacement with a correctly specified part essential to keeping the hydraulic system operating safely and efficiently.

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.