The Bomag 05543235 Reducing Union is a genuine OEM hydraulic fitting designed for a wide range of Bomag tandem rollers and pneumatic tyred rollers, including BW 141, BW 151, BW 154, BW 161, BW 174, BW 190, BW 191, BW 202, BW 203, BW 205, and BW 206 tandem roller models, as well as BW 24 RH, BW 25 RH, and BW 27 RH pneumatic tyred rollers. Sourced directly from Bomag, this genuine OEM component is manufactured to the same specifications as the original part it replaces. This reducing union installs directly into the hydraulic circuit of compatible machines, ensuring a leak-free connection between lines of differing diameters across the full range of covered models.
Key Features
- Genuine OEM Hydraulic Fitting — manufactured by Bomag to original thread form, sealing surface, and pressure ratings for this exact hydraulic line application, eliminating the risk of mismatched tolerances.
- Drop-In Compatibility — this reducing union matches the original port size and thread specification, allowing straightforward installation without modification to existing hydraulic lines or fittings.
- Broad Fitment Across Bomag Roller Families — fits tandem roller models including BW 141 AD-4, BW 154 AP-4, BW 174 AP-4, BW 190 AD-4, BW 202 AD-4, BW 203 AD-4, BW 191 AD-5, and BW 206 AD-5, as well as BW 24 RH, BW 25 RH, and BW 27 RH pneumatic tyred rollers, among others.
- Leak-Free Hydraulic Integrity — a correctly seated reducing union maintains proper system pressure between differing line diameters; a worn or damaged union can cause hydraulic fluid loss, pressure drop, and compaction performance degradation.
- Corrosion-Resistant Construction — built to withstand the hydraulic fluid exposure, vibration, and environmental conditions inherent to roller compaction operations.
A reducing union is a threaded hydraulic fitting that connects two hydraulic lines of different diameters within the same circuit, allowing fluid to pass between them while maintaining system pressure. In Bomag rollers, these fittings appear throughout the hydraulic system wherever line sizes transition — at pump outlets, valve blocks, or accessory circuits. When a reducing union develops a leak or its threads wear, hydraulic pressure at that point in the circuit drops, which can affect drum drive, vibration system response, or steering — depending on where in the circuit the union is located. Replacing a failed union with a genuine OEM part restores the sealed connection and returns the hydraulic circuit to full operating condition.
Part Details
| Part Number | 05543235 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Reducing Union |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 154 AP-4 AM | 00818299, 00824177, 00824715 |
| Tandem Roller | BW 154 AP-4 | 00818301, 00824179, 00824717 |
| Tandem Roller | BW 154 ACP-4 AM | 00818303 |
| Tandem Roller | BW 154 ACP-4 | 00818305, 00824721 |
| Tandem Roller | BW 190 AD-4 AM | 00818309, 00824021 |
| Pneumatic Tyred Roller | BW 25 RH | 00818321 |
| Tandem Roller | BW 161 ADH-4 CHINA | 00818365 |
| Tandem Roller | BW 190 AD-4 | 00818379, 00818965, 00824009 |
| Tandem Roller | BW 202 AD-4 | 00818381, 00818961, 00824005 |
| Tandem Roller | BW 141 AD-4 AM | 00818553 |
| Tandem Roller | BW 151 AD-4 AM | 00818555, 00824017 |
| Tandem Roller | BW 154 AD-4 | 00818557 |
| Tandem Roller | BW 141 AD-4 | 00818561, 00818955, 00818999 |
| Tandem Roller | BW 151 AD-4 | 00818563, 00818957, 00824001 |
| Tandem Roller | BW 151 AC-4 | 00818565, 00824011 |
| Tandem Roller | BW 161 AC-4 | 00818589, 00818967 |
| Tandem Roller | BW 203 AD-4 AM | 00818591, 00824019, 00825067 |
| Tandem Roller | BW 203 AD-4 | 00818599, 00818963 |
| Pneumatic Tyred Roller | BW24RH | 00818691 |
| Tandem Roller | BW 174 AP-4 AM | 00818845 |
| Tandem Roller | BW 174 AP-4 | 00818847 |
| Pneumatic Tyred Roller | BW 24 RH | 00818949, 00818951, 00824405 |
| Pneumatic Tyred Roller | BW 27 RH | 00818953, 00818997, 00824407 |
| Tandem Roller | BW 161 AD-4 | 00818959, 00824003 |
| Tandem Roller | BW 174 AP-4 AM PB | 00818971 |
| Tandem Roller | BW 174 AP-4 PB | 00818973 |
| Tandem Roller | BW 151 AC-4 AM | 00824025 |
| Tandem Roller | BW 141 AD-5 | 00824049, 00825593 |
| Tandem Roller | BW 151 AD-5 | 00824051, 00825595 |
| Tandem Roller | BW 154 AD-5 | 00824053, 00825597 |
| Tandem Roller | BW 151 AD-5 AM | 00824055 |
| Tandem Roller | BW 151 AC-5 | 00824057 |
| Tandem Roller | BW 141 AD-50 | 00824059 |
| Tandem Roller | BW 174 AP-4i AM | 00824093 |
| Tandem Roller | BW 174 AP-4i | 00824095 |
| Tandem Roller | BW 161 AD-50 | 00824111 |
| Pneumatic Tyred Roller | BW 27 RH-4i | 00824131, 00824409 |
| Tandem Roller | BW 191 AD-5 | 00824281 |
| Tandem Roller | BW 206 AD-5 | 00824283 |
| Tandem Roller | BW 161 ADO-4 | 00824333, 00824335 |
| Tandem Roller | BW 154 AP-4i AM | 00824385 |
| Tandem Roller | BW 161 AD-4 EU-Flex | 00824393 |
| Tandem Roller | BW 202 AD-4 EU-Flex | 00824395 |
| Tandem Roller | BW 203 AD-4 AM EU-Flex | 00824397 |
| Tandem Roller | BW 154 AP-4i | 00824587 |
| Tandem Roller | BW 154 ACP-4i AM | 00824589, 00825383 |
| Tandem Roller | BW 190 AD-5 | 00824603 |
| Pneumatic Tyred Roller | BW 27 RH-4i BC | 00824723 |
| Tandem Roller | BW203AD-4 | 00824739, 00826243 |
| Tandem Roller | BW 205 AD 4 | 00824889 |
| Tandem Roller | BW 174 AP-4f AM | 00824909 |
| Tandem Roller | BW 174 AP-4f | 00824911 |
| Tandem Roller | BW 203 ADO-4 | 00825049 |
| Tandem Roller | BW141AD 5 | 00827405 |
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.
