The Bomag 05542290 Reducing Union is a genuine OEM component designed for a wide range of Bomag equipment, including single drum rollers such as the BW 213 D-5 SL and BW 332, tandem rollers including the BW 141 AD-2 and BW 174 AD-2 AM, refuse and landfill compactors such as the BC 601 RB, BC 772 RB, and BC 972 RB, soil compactors including the BC 772 EB-2 and BC 672 EB-2, recyclers and stabilizers such as the MPH 122, MPH 125, MPH 600, RS 460, RS 500, RS 650, BS 12000, and BS 12000 Profi, cold milling machines including the BM 2000/75, BM 2200/75, BM 2500/75, BM 500/15 Stage V, and BM 600/15 Stage V, the BW 12 R pneumatic tyred roller, the BP 50/55 HE vibratory plate, and the BW 850 TR trench compactor. As a direct OEM replacement sourced from Bomag, this reducing union is built to the same specifications as the original, ensuring a proper hydraulic or fluid-line connection without the guesswork of fitment. Order with confidence knowing part number 05542290 is an exact match for your machine's fluid system.
Key Features
- Genuine OEM Fluid-Line Integrity — Manufactured to Bomag's original material and thread specifications, this reducing union maintains leak-free connections in hydraulic and fluid systems where pressure integrity is critical.
- Drop-In Thread Compatibility — Engineered to match the original port sizes and thread form, this part connects directly to existing lines and fittings without reworking adjacent components.
- Broad Bomag Fleet Coverage
- Consistent Flow Path — A correctly sized reducing union steps down line diameter without restricting flow or creating turbulence, protecting downstream components and maintaining system pressure balance.
- Fuel and Hydraulic System Safety — A failed or improperly rated union can cause fluid leaks under pressure, creating fire risk and unplanned machine shutdowns; replacing with the correct OEM union restores safe system operation.
A reducing union is a threaded fitting that joins two fluid lines of different diameters, allowing hydraulic oil, coolant, or fuel to transition from a larger-bore line to a smaller one within the same circuit. In heavy compaction and milling equipment, these fittings are found throughout engine cooling, hydraulic drive, and fuel delivery systems, where maintaining a sealed, pressure-rated connection is essential to safe operation. When a reducing union cracks, corrodes, or strips its threads, the resulting leak can drop system pressure, contaminate fluid, and force a full machine shutdown until the fitting is replaced.
Part Details
| Part Number | 05542290 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Reducing Union |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Single Drum Roller | BW 213 D | 00810062, 00814209 |
| Single Drum Roller | BW 172 D-2 | 00810074 |
| Tandem Roller | BW 164 AD | 00810155 |
| Pneumatic Tyred Roller | BW 12 R | 00813711 |
| Refuse / Landfill Compactor | BC 601 RB | 00816010, 00816012 |
| Refuse / Landfill Compactor | BC 772 RB | 00817406 |
| Refuse / Landfill Compactor | BC 772 RS | 00817407 |
| Refuse / Landfill Compactor | BC 972 RB | 00817408 |
| Tandem Roller | BW 141 AD-2 | 00817474 |
| Tandem Roller | BW 144 AD-2 | 00817477, 00817478 |
| Tandem Roller | BW 151 AC-2 | 00817485 |
| Tandem Roller | BW 151 AD-2 | 00817486 |
| Tandem Roller | BW 154 AD-2 | 00817490, 00817491, 00817599 |
| Tandem Roller | BW 161 AC-2 | 00817492 |
| Tandem Roller | BW 164 AC-2 | 00817495 |
| Single Drum Roller | BW 213 DH-3 | 00817528 |
| Tandem Roller | BW141AD 2 | 00817573 |
| Recycler / Stabilizer | MPH 121 | 00817587 |
| Recycler / Stabilizer | MPH 122 | 00817595 |
| Tandem Roller | BW 184 AD-2 AM | 00817600 |
| Single Drum Roller | BW 213 DH 3 VARIOCONTOL | 00817605 |
| Single Drum Roller | BW 145 DH-3 | 00817638 |
| Single Drum Roller | BW 145 PDH-3 | 00817639 |
| Tandem Roller | BW 164 AD-2 | 00817640 |
| Tandem Roller | BW 174 AD-2 AM | 00817693 |
| Tandem Roller | BW 174 AC-2 AM | 00817714 |
| Tandem Roller | BW 170 AD-2 AM | 00817716 |
| Single Drum Roller | BW 213 DH-4 | 00817781, 00818289, 00824143, 00824153 |
| Refuse / Landfill Compactor | BC 1172 RB | 00817827 |
| Refuse / Landfill Compactor | BC 672 RB | 00817909 |
| Single Drum Roller | BW 145-DH-3 | 00817929 |
| Recycler / Stabilizer | MPH 122-2 | 00818177, 00818727, 00818911, 00824987 |
| Refuse / Landfill Compactor | BC 772 RB-2 | 00818179, 00818885, 00818933, 00824639 |
| Refuse / Landfill Compactor | BC 672 RB-2 | 00818181, 00818887, 00818931, 00824641 |
| Refuse / Landfill Compactor | BC 572 RB-2 | 00818183, 00818893, 00824257 |
| Refuse / Landfill Compactor | BC 772 RS-2 | 00818185, 00818895, 00824643 |
| Soil Compactor | BC 772 EB-2 | 00818187, 00818897 |
| Soil Compactor | BC 672 EB-2 | 00818189 |
| Recycler / Stabilizer | MPH 125 | 00818273, 00818681, 00818909 |
| Single Drum Roller | BW 145 DH 40 BW 145 DH 4 | 00818325 |
| Single Drum Roller | BW 145 PDH 40 BW145 PDH 4 | 00818327 |
| Tandem Roller | BW 174 AP-AM | 00818343, 00818537 |
| Tandem Roller | BW 174 ACP-AM | 00818355, 00818535 |
| Single Drum Roller | BW 213 DH 4 | 00818437 |
| Tandem Roller | BW 170 AP AM | 00818515 |
| Single Drum Roller | BW 332 | 00818725 |
| Single Drum Roller | BW145DH 40 | 00818939, 00818941 |
| Single Drum Roller | BW145PDH 40 | 00818943 |
| Recycler / Stabilizer | MPH 600 | 00824097, 00824099 |
| Refuse / Landfill Compactor | BC 772 RB-3 | 00824101 |
| Refuse / Landfill Compactor | BC 672 RB-3 | 00824259 |
| Recycler / Stabilizer | BS 12000 | 00824291 |
| Recycler / Stabilizer | BS 12000 Profi | 00824293 |
| Refuse / Landfill Compactor | BC 772 RS-3 | 00824349 |
| Single Drum Roller | BW 213 DH-4i | 00824439 |
| Refuse / Landfill Compactor | BC 473 RB-4 | 00824525 |
| Refuse / Landfill Compactor | BC 473 RS-4 | 00824527 |
| Single Drum Roller | BW 213 | 00824577, 00825991 |
| Recycler / Stabilizer | MPH 600 3B/4i-PB | 00824645 |
| Single Drum Roller | BW 213 DH 4I | 00824677, 00824679 |
| Single Drum Roller | BW213DH P-5 | 00824729, 00825989 |
| Cold Milling Machine | BM 2000/75 | 00824741 |
| Recycler / Stabilizer | MPH 600 EU-FLEX | 00824751 |
| Recycler / Stabilizer | RS 500 | 00824753, 00824755 |
| Cold Milling Machine | BM 2200/75 | 00824801 |
| Recycler / Stabilizer | RS 460 | 00824809, 00825187, 00825189 |
| Soil Compactor | BC 473 EB-4 | 00824855 |
| Refuse / Landfill Compactor | BC 972 RB-4 | 00824899 |
| Refuse / Landfill Compactor | BC 1172 RB-4 | 00824901 |
| Recycler / Stabilizer | BS 12000 PROFI | 00824979 |
| Refuse / Landfill Compactor | BC 473 RB-3 | 00825083 |
| Recycler / Stabilizer | RS 650 | 00825131 |
| Soil Compactor | BC 473 EB-3 | 00825137 |
| Recycler / Stabilizer | RS460 STAGE V | 00825263 |
| Cold Milling Machine | BM 2000/75 TE | 00825881 |
| Cold Milling Machine | BM 500/15 Stage V | 00825885 |
| Cold Milling Machine | BM 600/15 Stage V | 00825887 |
| Cold Milling Machine | BM 2500/75 | 00826375 |
| Cold Milling Machine | BM 500/15-2 | 00826459 |
| Cold Milling Machine | BM2000/65 Stage V | 00826467 |
| Cold Milling Machine | BM2200/65 Stage V | 00826469 |
| Cold Milling Machine | BM 600/15-2 | 00826479 |
| Single Drum Roller | BW 211 D-5 SL | 00826825 |
| Single Drum Roller | BW 213 D-5 SL | 00826827 |
| Single Drum Roller | BW 213 DH | 00827275 |
| Vibratory Plate | BP 50/55 HE | 00813334 |
| Trench Compactor | BW 850 TR | 00815210 |
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.
