The Bomag 05553670 Reducing Union is a genuine OEM component designed for Bomag BW-series tandem rollers and single drum rollers. Sourced directly from Bomag, this reducing union meets the exact fit and material specifications of the original part it replaces. This component is compatible with a broad range of Bomag compaction equipment, including BW 141 AD-4, BW 151 AD-4, BW 161 AD-4, BW 177 D-5, BW 177 DH-5, BW 145 D-5, BW 100 AD-5, and BW 120 AD-5 models, among others. Ordering by part number 05553670 confirms you are getting the correct union for your machine.
Key Features
- Genuine OEM Construction — manufactured to Bomag's original material and dimensional specifications for a hydraulic or fluid-line union, ensuring correct thread engagement and leak-free sealing under operating pressures
- Direct-Fit Replacement — installs in the same port as the original, with matching thread form and reducer sizing so no adapters or rework are needed at the connection point
- Broad Tandem and Single Drum Roller Coverage — fits BW 100, BW 120, BW 141, BW 145, BW 151, BW 154, BW 161, and BW 177 series tandem rollers and single drum rollers across the -4 and -5 generation variants
- Fluid System Integrity — a correctly seated reducing union maintains proper flow path and pressure between lines of differing diameters; a worn or damaged union risks fluid leaks, pressure loss, and system contamination that can cascade into costly component failure
- Verified Part Number Traceability — ordering by Bomag part number 05553670 eliminates cross-reference guesswork and confirms the union is matched to your specific roller variant
A reducing union is a threaded fitting that joins two fluid lines of different diameters within the machine's hydraulic or cooling circuit, allowing flow to pass between them without leaks or pressure drop. It acts as the transition point between pipe or hose sizes, maintaining a sealed, continuous pathway for fluid under pressure. When a reducing union cracks, corrodes, or strips its threads, the result is fluid weeping or outright leakage at the connection, which can starve downstream components of pressure and lead to overheating or hydraulic failure if not addressed promptly.
Part Details
| Part Number | 05553670 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Reducing Union |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 141 AD-4 | 00817697, 00818561, 00818955, 00818999 |
| Tandem Roller | BW 154 AD-4 AM | 00817699, 00818447 |
| Tandem Roller | BW151AD 4 | 00817843 |
| Tandem Roller | BW 154 AD-4 | 00817901, 00818557 |
| Tandem Roller | BW 151 AD-4 AM | 00817913, 00818555, 00824017 |
| Tandem Roller | BW 141 AD-4 AM | 00817925, 00818553 |
| Tandem Roller | BW 161 AC-4 | 00817947, 00818589, 00818967 |
| Tandem Roller | BW 151 AC-4 AM | 00817953, 00818559, 00824025 |
| Tandem Roller | BW 161 AD-4 | 00818481, 00818959, 00824003, 00824735 |
| Tandem Roller | BW 151 AD-4 | 00818563, 00818957, 00824001 |
| Tandem Roller | BW 151 AC-4 | 00818565, 00824011 |
| Tandem Roller | BW 100 SCC-5 | 00824127, 00825295 |
| Tandem Roller | BW 100 SC-5 | 00824129 |
| Tandem Roller | BW 161 ADO-4 | 00824333, 00824335 |
| Tandem Roller | BW 161 AD-4 EU-Flex | 00824393 |
| Single Drum Roller | BW 177 D-5 | 00824915, 00825725 |
| Single Drum Roller | BW 177 DH-5 | 00824917, 00825727 |
| Single Drum Roller | BW 145 DH-5 | 00825721 |
| Single Drum Roller | BW 145 PDH-5 | 00825723 |
| Single Drum Roller | BW 177 PDH-5 | 00825729 |
| Single Drum Roller | BW 177-5 | 00825731 |
| Tandem Roller | BW 120 AD-5 | 00826639, 00826689 |
| Tandem Roller | BW 120 SL-5 | 00826779 |
| Tandem Roller | BW 100 AD-5 | 00826813 |
| Single Drum Roller | BW 145 D-5 PL | 00827061 |
| Single Drum Roller | BW 177 PDH-5 PL | 00827075 |
| Single Drum Roller | BW 177 DH-5 PL | 00827077, 00827377 |
| Single Drum Roller | BW 177 D-5 PL | 00827081, 00827375 |
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.
