The Bomag 05542319 Reducing Union is a genuine OEM component designed for Bomag tandem rollers and cold milling machines, including the BW 120 AD, BW 100 AC-3, BW 120 AC-3, BW 125 ACH, BW 135 AC, BW 138 AC, BW 80 ADS, BW 90 AC-2, BM 500/15 Stage V, BM 600/15 Stage V, BM 500/15-2, BM2000/65 Stage V, and BM 600/15-2. Sourced directly from Bomag, this reducing union carries the same part number 05542319 used in the original factory build, ensuring a direct, like-for-like replacement. Correct fitment is critical in hydraulic and fluid-line systems, and this OEM part delivers exactly that across a broad range of Bomag equipment.
Key Features
- Genuine OEM Fluid-Line Integrity — manufactured to Bomag's own thread and bore specifications, ensuring leak-free connections in pressurized hydraulic and fluid circuits
- Direct Drop-In Replacement — matches the original installation geometry so this reducing union seats and seals correctly without rework or adaptation
- Broad Bomag Coverage — fits BW-series tandem rollers including the BW 80 ADS, BW 90 AC-2, BW 100 AC-3, BW 120 AD, BW 120 AC-3, BW 125 ACH, BW 135 AC, and BW 138 AC, as well as BM-series cold milling machines including the BM 500/15-2, BM 500/15 Stage V, BM 600/15-2, BM 600/15 Stage V, and BM2000/65 Stage V
- Pressure-System Reliability — a worn or damaged reducing union can cause fluid leaks, pressure loss, and erratic system behavior; replacing it with a correctly rated OEM part restores stable system pressure and protects connected components
- Verified Part Number Traceability — order with confidence using part number 05542319, the exact Bomag catalog reference for this union across all listed models
A reducing union is a threaded fitting used to connect two fluid lines of different diameters within a hydraulic or fluid circuit, allowing flow to pass from a larger-bore line to a smaller-bore line — or vice versa — without the need for separate adapters. In Bomag tandem rollers and cold milling machines, these fittings are found throughout hydraulic, water, and cooling circuits where line sizes change between components. A failing or corroded reducing union can introduce leaks, restrict flow, or cause pressure irregularities that affect system performance and, left unaddressed, may lead to damage in downstream components such as pumps, motors, or valves.
Part Details
| Part Number | 05542319 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Reducing Union |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 120 AD | 00810019, 00810051, 00810146 |
| Tandem Roller | BW 100 AC-3 | 00817457 |
| Tandem Roller | BW 120 AC-3 | 00817462 |
| Tandem Roller | BW 125 ACH | 00817466 |
| Tandem Roller | BW 135 AC | 00817470 |
| Tandem Roller | BW 138 AC | 00817472, 00818361 |
| Tandem Roller | BW 80 ADS | 00817567, 00818513 |
| Tandem Roller | BW 90 AC-2 | 00817568, 00818045 |
| Cold Milling Machine | BM 500/15 Stage V | 00825885 |
| Cold Milling Machine | BM 600/15 Stage V | 00825887 |
| Cold Milling Machine | BM 500/15-2 | 00826459 |
| Cold Milling Machine | BM2000/65 Stage V | 00826467 |
| Cold Milling Machine | BM 600/15-2 | 00826479 |
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.
