The Bomag 05901230 Square Ring is a genuine OEM seal component designed for Bomag BW 177, BW 179, and BW 145 series single drum rollers. Sourced directly from Bomag, this square ring meets the same specifications as the original part installed at the factory. This seal fits an extensive range of BW 177 and BW 179 variants — including DH, PDH, DHC, PDHC, and BVC configurations across the -3, -4, -40, -5, and -50 generations — as well as BW 145 DH-5 and BW 145 PDH-5 single drum rollers. Ordering by part number 05901230 ensures you receive the correct ring geometry and material grade for a proper, leak-free installation.
Key Features
- Genuine OEM Seal Material — manufactured to Bomag's original compound and cross-section specifications, ensuring the correct compression and sealing performance for hydraulic or fluid-circuit applications on single drum rollers
- Broad BW-Series Coverage — fits BW 145 DH-5, BW 145 PDH-5, BW 177 and BW 179 variants including DH, PDH, DHC, PDHC, and BVC builds across multiple generation suffixes
- Direct Drop-In Replacement — the square ring profile matches the original groove dimensions exactly, allowing straightforward installation without machining or adaptation
- Leak Prevention Under Load — a correctly seated square ring maintains a consistent fluid seal during compaction cycles; a worn or extruded ring leads to fluid loss, pressure drop, and potential system damage
- Verified by Part Number 05901230 — cross-reference this number against your machine's service manual to confirm fitment before installation
A square ring is a four-sided sealing element used in place of a traditional O-ring in certain hydraulic and fluid-circuit grooves. Its flat sides resist rolling and twisting in dynamic or static applications, providing a more stable seal under repeated pressure cycling. When a square ring degrades — through compression set, cracking, or extrusion — fluid can bypass the seal, leading to leaks, reduced system pressure, and accelerated wear on surrounding components. Replacing a worn square ring promptly keeps the hydraulic circuit operating at the correct pressure and protects the integrity of the surrounding assembly.
Part Details
| Part Number | 05901230 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Square Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Single Drum Roller | BW 177 DH-3 USA | 00817677 |
| Single Drum Roller | BW 177 PDH-3 USA | 00817679 |
| Single Drum Roller | BW 177 PDH-4 | 00817763, 00818541 |
| Single Drum Roller | BW 177 DH-4 | 00817765, 00818453, 00818543, 00824037, 00824133 |
| Single Drum Roller | BW 179 DH-4 | 00817767, 00818545, 00824137 |
| Single Drum Roller | BW 179 PDH-4 | 00817769, 00818549, 00824139 |
| Single Drum Roller | BW177DH 3 | 00817865 |
| Single Drum Roller | BW 179 DHC-4 | 00818033, 00818547 |
| Single Drum Roller | BW 177 DHC-4 | 00818035, 00818455 |
| Single Drum Roller | BW 177 DH-40 | 00818169 |
| Single Drum Roller | BW 177 PDH-40 | 00818171 |
| Single Drum Roller | BW 177 PDHC-4 | 00818283, 00818539 |
| Single Drum Roller | BW 179 PDHC-4 | 00818285 |
| Single Drum Roller | BW177PDH 40 | 00818585 |
| Single Drum Roller | BW 177 DH-50 | 00824089 |
| Single Drum Roller | BW 177 PDH-50 | 00824091 |
| Single Drum Roller | BW 145 DH-5 | 00824471, 00825721 |
| Single Drum Roller | BW 145 PDH-5 | 00824473, 00825723 |
| Single Drum Roller | BW 177 DH-5 | 00824475, 00824917, 00825435, 00825727 |
| Single Drum Roller | BW 177 PDH-5 | 00824477, 00825437, 00825729 |
| Single Drum Roller | BW 177BVC-5 | 00824479 |
| Single Drum Roller | BW 177-5 | 00825731 |
| Single Drum Roller | BW 177 PDH-5 PL | 00827075 |
| Single Drum Roller | BW 177 DH-5 PL | 00827077, 00827377 |
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.
