The Bomag 05741778 O-Ring is a genuine OEM sealing component designed for Bomag tandem rollers across the BW 161, BW 170, BW 174, BW 190, and BW 202 series. Sourced directly from Bomag, this O-Ring matches the original specification exactly, ensuring a proper seal in the hydraulic or fluid system where it is installed. Compatible models include the BW 174 AP, BW 174 AP-4, BW 174 AP-4i, BW 161 AD-5, BW 161 AC-5, BW 190 AD-5, BW 202 AD-5, and additional BW 170 and BW 174 variants — making it a practical stock item for operators running multiple machines in this roller family.
Key Features
- OEM Sealing Grade — manufactured to Bomag's original material and dimensional specification, delivering the compression and chemical resistance required for correct sealing performance in tandem roller hydraulic systems
- Drop-In Replacement — matches the original O-Ring profile and cross-section, seating correctly in its groove without rework or modification to mating surfaces
- Broad Tandem Roller Coverage — fits BW 161, BW 170, BW 174, BW 190, and BW 202 series tandem rollers, including AP, AC, AD, ADO, ACP, and AP-4i variants
- Leak Prevention — a correctly seated O-Ring maintains system pressure and prevents fluid loss that can lead to component damage or unplanned service stops
- Genuine Bomag Part — supplied as part number 05741778 under Bomag's OEM program, ensuring traceability and confidence in fitment accuracy
An O-Ring is a precision-formed loop of elastomeric material used to create a fluid-tight seal between two mating surfaces or within a bore. In tandem rollers like the BW 174 and BW 202, O-Rings appear throughout the hydraulic system — in pumps, motors, valve blocks, and fittings — where they prevent oil or fluid from escaping under pressure. When an O-Ring degrades, hardens, or is pinched during assembly, it loses its sealing ability, causing leaks that reduce system pressure and can accelerate wear on surrounding components. Replacing a worn O-Ring promptly with a correctly specified part restores the integrity of the sealed system and keeps the machine operating as intended.
Part Details
| Part Number | 05741778 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 170 AP AM | 00818515 |
| Tandem Roller | BW 174 AP | 00818517 |
| Tandem Roller | BW 174 ACP | 00818519 |
| Tandem Roller | BW 174 ACP-AM | 00818535 |
| Tandem Roller | BW 174 AP-AM | 00818537 |
| Tandem Roller | BW 174 AP-4 AM | 00818655, 00818845, 00824543 |
| Tandem Roller | BW 174 AP-4 | 00818657, 00818847, 00824545 |
| Tandem Roller | BW 174 AP-4 AM PB | 00818971 |
| Tandem Roller | BW 174 AP-4 PB | 00818973 |
| Tandem Roller | BW 174 AP-4i AM | 00824093, 00824627, 00825051 |
| Tandem Roller | BW 174 AP-4i | 00824095, 00824629, 00825053 |
| Tandem Roller | BW 161 AD-5 | 00824103, 00824647 |
| Tandem Roller | BW 161 AC-5 | 00824109, 00824655 |
| Tandem Roller | BW 161 ADO-5 | 00824359, 00824657 |
| Tandem Roller | BW 190 AD-5 | 00824361, 00824651 |
| Tandem Roller | BW 190 ADO-5 | 00824363, 00824661 |
| Tandem Roller | BW 202 AD-5 | 00824649 |
| Tandem Roller | BW 174 APO-4i | 00825099 |
| Tandem Roller | BW 174 ACP 4I AM | 00825103 |
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.
