The Bomag 05543242 Reducing Union is a genuine OEM component designed for the BW 900 AD tandem roller and the BW 900-2 walk-behind roller. Sourced directly from Bomag, this reducing union delivers the exact dimensional and thread specifications required for a correct, leak-free installation. If you're maintaining or rebuilding a BW 900 AD or BW 900-2, using the correct OEM part ensures the hydraulic or fluid circuit performs exactly as intended. DHS Equipment stocks this part and can help verify fitment before you order.
Key Features
- Genuine OEM Specification — manufactured to Bomag's exact thread pitch, taper, and bore dimensions, ensuring proper sealing and flow characteristics specific to this reducing union application
- Direct Drop-In Replacement — connects to existing ports and fittings on the BW 900 AD and BW 900-2 without reworking lines or adapting hardware
- Verified Fitment — confirmed for BW 900 AD tandem rollers and BW 900-2 walk-behind rollers; part number 05543242 is listed directly in the Bomag OEM parts catalog
- Leak-Free Fluid Transfer — a correctly sized reducing union maintains consistent pressure and flow between two differently sized lines; a faulty or mismatched union risks fluid loss, pressure drop, and circuit failure
- Durable Construction — built to withstand the pressure cycling and vibration environment typical of compaction equipment, supporting long service life between replacements
A reducing union is a threaded connector that joins two fluid lines of different diameters, allowing the circuit to transition between sizes while maintaining a sealed, continuous flow path. In compaction equipment like the BW 900 AD and BW 900-2, these fittings are commonly found in hydraulic and fuel systems where line diameters change between components. When a reducing union fails — through thread wear, cracking, or corrosion — it can cause fluid leaks, pressure loss, and ultimately machine downtime. Replacing it with the correct OEM part, Bomag 05543242, restores circuit integrity and keeps the machine operating at spec.
Part Details
| Part Number | 05543242 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Reducing Union |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 900 AD | 00817570 |
| Walk-Behind / Light Roller | BW 900-2 | 00817821, 00818363 |
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.
