The Bomag 05815139 Backup Ring is a genuine OEM seal component designed for Bomag BW-series tandem rollers. Sourced directly from Bomag, this part meets the exact specifications required for proper hydraulic or pneumatic sealing performance across a broad range of machines, including the BW 120 AC-3, BW 131 ACW-2, BW 80 ADS, BW 90 AC-2, BW 100 AC-4, BW 120 AC-4, BW 120 AC-5, BW 125 AC-4, BW 115 AC-3, BW 115 AD-3, BW 131 ACW-3, and BW 138 AC-5 tandem rollers. Using a genuine OEM component ensures the correct material grade and dimensional tolerancing for a long-lasting, leak-free seal. Ordering by part number 05815139 confirms you receive the right part for your machine.
Key Features
- Genuine OEM Material Grade — manufactured to Bomag's original compound and dimensional specifications, delivering the correct compression and extrusion resistance critical for a backup ring in hydraulic applications
- Direct-Fit Installation — engineered to seat correctly in the original groove geometry without reworking the housing or mating surfaces
- Broad BW Tandem Roller Coverage — confirmed fitment across the BW 80 ADS, BW 90 AC-2, BW 100 AC-4, BW 115 AC-3, BW 115 AD-3, BW 120 AC-3, BW 120 AC-4, BW 120 AC-5, BW 125 AC-4, BW 131 ACW-2, BW 131 ACW-3, and BW 138 AC-5 tandem rollers
- Seal System Integrity — a worn or extruded backup ring allows the primary seal to deform under pressure, leading to hydraulic fluid loss, erratic drum or steering response, and accelerated seal failure across the assembly
A backup ring works alongside a primary O-ring or hydraulic seal to prevent it from extruding into the clearance gap between mating components under pressure. Without a correctly fitted backup ring, the softer primary seal deforms and fails prematurely, causing fluid leaks and pressure loss. On tandem rollers, where hydraulic systems control drum vibration, propulsion, and steering, a failed seal at any point in the circuit can result in sluggish response, loss of compaction force, or the machine being taken out of service entirely.
Part Details
| Part Number | 05815139 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Backup Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 120 AC-3 | 00817462 |
| Tandem Roller | BW 131 ACW-2 | 00817468 |
| Tandem Roller | BW 80 ADS | 00817567, 00818513 |
| Tandem Roller | BW 90 AC-2 | 00817568, 00818045 |
| Tandem Roller | BW 100 AC-4 | 00817687, 00818467, 00818731 |
| Tandem Roller | BW 120 AC-4 | 00817691, 00818471, 00818597 |
| Tandem Roller | BW 125 AC-4 | 00818271, 00818475 |
| Tandem Roller | BW 115 AC-3 | 00818693 |
| Tandem Roller | BW 115 AD-3 | 00818695 |
| Tandem Roller | BW 131 ACW-3 | 00818697 |
| Tandem Roller | BW 138 AC-5 | 00818719 |
| Tandem Roller | BW 120 AC-5 | 00824031 |
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.
