The Bomag 05800043 Back-Up Ring is a genuine OEM sealing component designed for the BW 212 D-2 single drum roller. Sourced directly from Bomag, this back-up ring meets the original design specification for its sealing application, ensuring a correct, leak-free installation without the guesswork of adapted or improperly sized alternatives. If you're servicing hydraulic or pneumatic circuits on your BW 212 D-2, part number 05800043 is the correct OEM-matched component for the job.
Key Features
- Genuine OEM Sealing Integrity — manufactured to Bomag's original material and dimensional specification, delivering the compression performance this sealing position demands
- Direct-Fit Replacement — matches the exact profile and cross-section of the original back-up ring, dropping into place without rework or resizing
- Confirmed Fitment — verified for the BW 212 D-2 single drum roller, so you can order with confidence for that specific machine
- Prevents Seal Extrusion — this back-up ring supports the primary seal under pressure, stopping extrusion that leads to fluid bypass and accelerated seal failure
- Hydraulic System Protection — a failed or missing back-up ring allows fluid to bypass the primary seal, causing pressure loss, contamination, and potential damage to downstream components
A back-up ring is a rigid or semi-rigid support ring installed alongside a primary O-ring or seal in pressurized assemblies. Its job is to prevent the softer primary seal from being pushed, or extruded, into the clearance gap between mating components under high pressure. Without a correctly fitted back-up ring, the primary seal deforms prematurely, causing fluid leaks and loss of hydraulic pressure. Replacing a worn or damaged back-up ring as part of any seal service restores the sealing stack to its intended geometry and keeps the hydraulic system operating at rated pressure.
Part Details
| Part Number | 05800043 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Back-Up Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Single Drum Roller | BW 212 D-2 | 00810687 |
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.
