Bomag 05542284 Reducing Union

The Bomag 05542284 Reducing Union is a genuine OEM hydraulic fitting designed for a wide range of Bomag cold milling machines, pavers, rollers, reversible vibratory plates, trench compactors, and recycler/stabilizer equipment. As a direct OEM replacement, this reducing union meets Bomag's original design criteria, ensuring a correct connection between differently sized hydraulic lines or ports without adaptation or guesswork. This part fits an extensive lineup including BF-series pavers, BM-series cold milling machines, BW-series tandem, single drum, walk-behind, and pneumatic tyred rollers, BPR-series reversible vibratory plates, MPH and RS recycler/stabilizer models, and BW 850 T and BW 1050 T trench compactors. Ordering by part number 05542284 guarantees you receive the exact fitting specified for your machine.

Key Features

• OEM Hydraulic Integrity — manufactured to Bomag's original pressure rating and thread specification, maintaining a leak-free seal under working hydraulic loads
• Drop-In Thread Compatibility — threads match the original port dimensions exactly, allowing this reducing union to seat and torque correctly without re-tapping or adapters
• Broad Cross-Equipment Fitment — confirmed for BF-series pavers, BM-series cold milling machines, BW tandem and single drum rollers, BPR reversible vibratory plates, MPH 364-2 and RS 360 TIER-4F recycler/stabilizers, and BW 850 T and BW 1050 T trench compactors
• Hydraulic System Continuity — a correctly sized and seated reducing union keeps hydraulic flow unrestricted between mismatched line sizes; a failed or wrong-spec fitting can cause pressure loss, fluid leaks, or downstream component damage
• Genuine Bomag Part — supplied as an authentic OEM component, verified under part number 05542284, so you can order with confidence that fitment and function match the original

A reducing union is a hydraulic connector that joins two fluid lines or ports of different diameters, allowing hydraulic fluid to pass between them without pressure drop or leakage at the transition point. In equipment as varied as cold milling machines, pavers, and compaction rollers, these fittings appear throughout the hydraulic circuit wherever a larger supply line steps down to a smaller component port or auxiliary circuit. When a reducing union corrodes, cracks, or develops thread damage, the result is typically a hydraulic fluid leak or a loss of pressure in the affected circuit, which can impair steering, drive, vibration, or auxiliary functions depending on where the fitting is located. Replacing a worn fitting with the correct OEM union restores circuit integrity and prevents further fluid loss or component wear.

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.