The Bomag 05904321 O-Ring is a genuine OEM sealing component designed for Bomag cold milling machines, including the BM 1000/35, BM 1200/35, BM 1300/35, BM 1200/35 T4f, BM 1300/35 T4f, BM 1000/35-2, BM1200/35-2, and BM1000/35-2. Sourced directly from Bomag, this O-Ring is manufactured to the exact material grade and dimensional tolerances required for proper sealing performance in your machine. Because it matches the original specification, this part seats correctly without rework or modification. Order with confidence knowing you are getting the right seal for your cold milling machine.
Key Features
- OEM-Grade Sealing Material — manufactured to Bomag's original compound and durometer specification, ensuring proper compression and long-term seal integrity in cold milling machine applications
- Exact-Dimension Replacement — matches the original cross-section and inner diameter precisely, seating fully into the groove on first installation
- Broad Cold Milling Coverage — fits the BM 1000/35, BM 1000/35-2, BM1000/35-2, BM 1200/35, BM1200/35-2, BM 1200/35 T4f, BM 1300/35, and BM 1300/35 T4f cold milling machines
- Leak Prevention Where It Counts — a correctly seated O-Ring keeps hydraulic or fluid circuits fully pressurized; a degraded or incorrectly sized seal causes fluid loss, pressure drop, and unplanned service stops
- Direct OEM Sourcing — part number 05904321 is a genuine Bomag component, giving you full traceability back to the original engineering drawing
An O-Ring is a precision-molded loop of elastomer that creates a pressure-tight seal between two mating surfaces or within a port, fitting, or cylinder bore. In a cold milling machine like the BM-series, O-Rings appear throughout the hydraulic system, cutting drum circuit, and ancillary fluid passages, where they prevent leaks and maintain the operating pressure needed for full machine output. When an O-Ring degrades — through heat cycling, chemical exposure, or compression set — it loses its ability to seal, leading to fluid seepage, loss of hydraulic pressure, and potential damage to surrounding components if left unaddressed.
Part Details
| Part Number | 05904321 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Cold Milling Machine | BM 1000/35 | 00824229, 00824569, 00824795 |
| Cold Milling Machine | BM 1200/35 | 00824533, 00824631, 00824797 |
| Cold Milling Machine | BM 1300/35 | 00824535, 00824633, 00824799 |
| Cold Milling Machine | BM 1200/35 T4f | 00825167 |
| Cold Milling Machine | BM 1300/35 T4f | 00825169 |
| Cold Milling Machine | BM 1000/35-2 | 00826457 |
| Cold Milling Machine | BM1200/35-2 | 00826485 |
| Cold Milling Machine | BM1000/35-2 | 00826489 |
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.
