The Bomag 05540420 Double-Ended Union is a genuine OEM hydraulic fitting designed for Bomag BW-series tandem rollers and BM-series cold milling machines. As a direct OEM replacement, this union is manufactured to the same specifications as the original component, ensuring a correct, leak-free connection within the machine's hydraulic or fluid line circuit. Compatible models include the BW 141 AD-5, BW 151 AD-5, BW 161 AD-5, BW 191 AD-5, BW 202 AD-5, BW 206 AD-5, BW 190 AD-5, BM 1000/35, BM 1200/35, and BM 1300/35, among other BW-series tandem roller and BM-series cold milling machine variants.
Key Features
- OEM Thread and Seat Geometry — manufactured to Bomag's exact thread form and seating profile, delivering a properly torqued, leak-free connection every time
- Drop-In Hydraulic Line Replacement — this union installs directly into the existing line ports without reworking fittings or adapting thread patterns on either end
- Broad Tandem Roller and Cold Milling Coverage — confirmed fitment across BW-series tandem rollers including the BW 141 AD-5, BW 161 AD-5, BW 191 AD-5, BW 202 AD-5, and BW 206 AD-5, as well as BM 1000/35, BM 1200/35, and BM 1300/35 cold milling machines
- Fluid Circuit Integrity — a correctly seated double-ended union maintains full system pressure and flow, preventing the fluid loss and pressure drop that lead to sluggish drum or milling drum response
- Genuine Bomag OEM Part — sourced directly from Bomag, carrying the part number 05540420 and backed by OEM quality assurance for long service life in demanding compaction and milling applications
A double-ended union is a straight-through hydraulic or fluid line connector that joins two separate lines or tube ends at a single point, allowing fluid to pass between them without restriction. It maintains a sealed, pressure-rated connection that keeps the hydraulic circuit operating at the correct pressure and flow rate. When a union develops a leak or fails — through corrosion, thread damage, or improper seating — the resulting pressure loss can cause erratic drum vibration, inconsistent milling depth, or reduced steering response, making prompt replacement critical to maintaining machine performance.
Part Details
| Part Number | 05540420 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Double-Ended Union |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 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 161 AD-5 | 00824103, 00824647, 00824945 |
| Tandem Roller | BW 161 AC-5 | 00824109, 00824655, 00826605 |
| Tandem Roller | BW 161 AD-50 | 00824111 |
| Tandem Roller | BW 202 AD-50 | 00824113 |
| Tandem Roller | BW 191 AD-5 | 00824281, 00825965 |
| Tandem Roller | BW 206 AD-5 | 00824283, 00825967 |
| Tandem Roller | BW 206 AD-5 AM | 00824287 |
| Tandem Roller | BW 206 AD-50 | 00824289 |
| Tandem Roller | BW 161 ADO-4 | 00824333, 00824335 |
| Tandem Roller | BW 161 ADO-5 | 00824359, 00824657, 00824947 |
| Tandem Roller | BW 190 AD-5 | 00824361, 00824603, 00824651 |
| Tandem Roller | BW 190 ADO-5 | 00824363, 00824661, 00824949 |
| Tandem Roller | BW 161 ADO-50 | 00824417 |
| Tandem Roller | BW 202 ADO-50 | 00824419 |
| Tandem Roller | BW 151 AD-50 | 00824501, 00824567 |
| Tandem Roller | BW 151 AC-50 | 00824503 |
| Tandem Roller | BW 191 ADO-5 | 00824599 |
| Tandem Roller | BW 206 ADO-5 | 00824601 |
| Tandem Roller | BW 202 AD-5 | 00824649, 00826599 |
| Cold Milling Machine | BM 1000/35 | 00824795 |
| Cold Milling Machine | BM 1200/35 | 00824797 |
| Cold Milling Machine | BM 1300/35 | 00824799 |
| Tandem Roller | BW 161 AC-50 | 00824853 |
| Tandem Roller | BW 203 ADO-4 | 00825049 |
| Tandem Roller | BW161AD 5 | 00825627, 00826591 |
| Tandem Roller | BW190AD 5 | 00825631, 00825641, 00826595, 00826597 |
| Tandem Roller | BW161AC 5 | 00825635 |
| Tandem Roller | BW161ADO 5 | 00825637, 00826593 |
| Tandem Roller | BW 202 ADO-5 | 00825639 |
| Tandem Roller | BW 191 AD-5 AM | 00825969 |
| Tandem Roller | BW 206 ADO-50 | 00826103 |
| 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.
