The Bomag 05542230 Reducing Union is a genuine OEM hydraulic fitting designed for Bomag tandem rollers, pneumatic tyred rollers, and cold milling machines. Sourced directly from Bomag, this reducing union delivers an exact match to the original component, ensuring proper fluid routing and system pressure integrity across the BW 141 AD-4, BW 151 AD-4, BW 154 AD-4, BW 161 AD-4, BW 190 AD-4, BW 202 AD-4, BW 203 AD-4, BW 27 RH, BW 25 RH, BW 24 RH, and BM2000/65 Stage V, among other covered models. When you order part number 05542230 from DHS Equipment, you are getting the same component that left the factory — no guesswork, no adaptation required.
Key Features
- Genuine OEM Hydraulic Fitting — manufactured to Bomag's original material and dimensional standards, ensuring correct thread form, sealing surface, and pressure rating for this specific hydraulic circuit application
- Drop-In Replacement — threads and port sizes match the original installation points exactly, so this reducing union connects directly to the existing lines without reworking fittings or adapters
- Broad Fitment Coverage — compatible with Bomag BW-series tandem rollers including the BW 141 AD-4, BW 154 AD-4, BW 161 AD-4, BW 190 AD-4, BW 202 AD-4, and BW 203 AD-4 families; BW 24 RH, BW 25 RH, and BW 27 RH pneumatic tyred rollers; and BM2000/65 Stage V and BM2200/65 Stage V cold milling machines
- Leak-Free System Integrity — a worn or damaged reducing union allows hydraulic fluid loss, pressure drop, and erratic machine response; replacing it restores proper flow transition between differently sized lines and maintains circuit efficiency
- Verified Part Number Traceability — order with confidence knowing that part number 05542230 maps directly to the Bomag bill of materials for every listed model, eliminating the risk of receiving a mismatched fitting
A reducing union is a hydraulic plumbing fitting that connects two lines of different diameters within the same fluid circuit, allowing pressurized hydraulic oil to transition smoothly from a larger bore to a smaller bore — or vice versa — without turbulence, leakage, or pressure loss. In Bomag rollers and milling machines, these fittings appear throughout the hydraulic system wherever the circuit design requires a change in line size, such as between the pump outlet and a control valve, or between a manifold and an actuator feed line. When the union corrodes, cracks, or strips its threads, the hydraulic circuit loses pressure integrity, resulting in sluggish drum drive, erratic vibration control, or fluid leaks that can escalate into more serious system damage if left unaddressed.
Part Details
| Part Number | 05542230 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Reducing Union |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 161 AD-4 | 00817641, 00818481 |
| Tandem Roller | BW 202 AD-4 | 00817642, 00818381 |
| Tandem Roller | BW 141 AD-4 | 00817697, 00818561 |
| Tandem Roller | BW 154 AD-4 AM | 00817699, 00818447 |
| Tandem Roller | BW 161 ADH-4 | 00817739 |
| Tandem Roller | BW 190 AD-4 | 00817823, 00818379 |
| Tandem Roller | BW 190 AD-4 AM | 00817825, 00818309 |
| Tandem Roller | BW 203 AD-4 AM | 00817837, 00818591 |
| Tandem Roller | BW151AD 4 | 00817843 |
| Tandem Roller | BW 154 AD-4 | 00817901, 00818557 |
| Tandem Roller | BW 151 AD-4 AM | 00817913, 00818555 |
| Tandem Roller | BW 141 AD-4 AM | 00817925, 00818553 |
| Tandem Roller | BW 161 AC-4 | 00817947, 00818589 |
| Tandem Roller | BW 151 AC-4 AM | 00817953, 00818559 |
| Tandem Roller | BW 154 AP-4 AM | 00818299 |
| Tandem Roller | BW 154 AP-4 | 00818301 |
| Tandem Roller | BW 154 ACP-4 AM | 00818303 |
| Tandem Roller | BW 154 ACP-4 | 00818305 |
| Pneumatic Tyred Roller | BW 27 RH | 00818315, 00818953, 00818997 |
| Pneumatic Tyred Roller | BW 25 RH | 00818321 |
| Tandem Roller | BW 161 ADH-4 CHINA | 00818365 |
| Pneumatic Tyred Roller | BW 24 RH | 00818457, 00818951 |
| Tandem Roller | BW 151 AD-4 | 00818563 |
| Tandem Roller | BW 151 AC-4 | 00818565, 00819699 |
| Tandem Roller | BW 203 AD-4 | 00818599 |
| Pneumatic Tyred Roller | BW24RH | 00818691 |
| Pneumatic Tyred Roller | BW 27 RH-4i | 00824131 |
| Cold Milling Machine | BM2000/65 Stage V | 00826467 |
| Cold Milling Machine | BM2200/65 Stage V | 00826469 |
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.
