The Bomag 05817791 Square Ring is a genuine OEM sealing component designed for Bomag single drum rollers and tandem rollers, including the BW 213 DH-3, BW 216 D-3, BW 177 DH-3, BW 225 D-3, BW 161 AD-4, and BW 202 AD-4, among others. Sourced directly from Bomag, this square ring meets the exact material and dimensional standards of the original part it replaces. This component is a direct fit for the hydraulic or fluid systems found across the BW 177, BW 213, BW 214, BW 216, BW 219, BW 225 single drum roller series and BW 161 and BW 202 tandem roller models. When a worn or damaged square ring is replaced with part number 05817791, hydraulic integrity is restored and the machine returns to proper operating condition.
Key Features
- OEM Sealing Integrity — manufactured to Bomag's original material grade and cross-section tolerances, ensuring consistent compression and leak-free sealing performance specific to this application
- Direct Drop-In Fit — dimensionally identical to the original square ring, seating correctly in its groove without rework or modification to surrounding components
- Broad Single Drum and Tandem Roller Coverage — confirmed fitment across the BW 177, BW 213, BW 214, BW 216, BW 219, and BW 225 single drum roller series, as well as BW 161 and BW 202 tandem rollers
- Fluid System Reliability — a correctly installed square ring prevents hydraulic fluid loss that would otherwise lead to pressure drop, erratic drum or drive response, and accelerated wear on downstream components
- Genuine Bomag Part — supplied as authentic OEM, backed by Bomag's own part number 05817791 for confident sourcing and inventory accuracy
A square ring is a sealing element used in hydraulic and fluid circuits to prevent leakage at joints, ports, and housing interfaces. Unlike a round O-ring, its flat-sided profile provides a larger sealing contact surface, resisting extrusion under pressure cycling and reducing the risk of spiral failure during installation. When this seal degrades — through age, heat, or compression set — hydraulic fluid can bypass the seal, causing pressure loss, contamination, and potential damage to pumps, motors, and valves throughout the system. Replacing a worn square ring promptly with the correct OEM part keeps the roller's hydraulic circuit sealed and operating at the pressures the system was engineered to maintain.
Part Details
| Part Number | 05817791 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Square Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Single Drum Roller | BW 213 DH-3 | 00815322, 00817526, 00817527, 00817528, 00817589 |
| Single Drum Roller | BW 216 D-3 | 00815340, 00817214, 00817535 |
| Single Drum Roller | BW 177 DH-3 | 00817505, 00817751 |
| Single Drum Roller | BW 177 DH 3 | 00817506 |
| Single Drum Roller | BW 177 PDH-3 | 00817508 |
| Single Drum Roller | BW 213 PDH-3 | 00817529, 00817530, 00817590 |
| Single Drum Roller | BW 214 DH-3 | 00817532, 00817592 |
| Single Drum Roller | BW 216 DH-3 | 00817537 |
| Single Drum Roller | BW 219 DH-3 | 00817540 |
| Single Drum Roller | BW 219 PDH-3 | 00817544 |
| Single Drum Roller | BW 225 D-3 | 00817546, 00817548 |
| Single Drum Roller | BW 225 | 00817549 |
| Single Drum Roller | BW177PDH 3 | 00817579 |
| Single Drum Roller | BW177DH-3 | 00817580 |
| Single Drum Roller | BW 213 DH 3 VARIOCONTOL | 00817591, 00817605 |
| Tandem Roller | BW 161 AD-4 | 00817641 |
| Tandem Roller | BW 202 AD-4 | 00817642 |
| Single Drum Roller | BW 216 DHC-3 | 00817643, 00817644 |
| Single Drum Roller | BW 213 DH-3 USA | 00817671 |
| Single Drum Roller | BW 213 PDH-3 USA | 00817673 |
| Single Drum Roller | BW 177 DH-3 USA | 00817677 |
| Single Drum Roller | BW 177 PDH-3 USA | 00817679 |
| Tandem Roller | BW 161 ADH-4 | 00817739 |
| Single Drum Roller | BW177DH 3 | 00817865 |
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.
