The Bomag 31780885 Ring Gear is a genuine OEM component designed for a wide range of Bomag tandem rollers, single drum rollers, and pneumatic tyred rollers, including the BW 184 AD, BW 213 D-3, BW 177 D-3, and BW 24 R. Sourced directly from Bomag, this ring gear meets the same exacting standards as the original part installed at the factory. It fits a broad cross-section of the BW roller lineup as well as select HYPAC C-series rollers, making it a reliable solution for fleet operators managing multiple machine types. Verify your model against the fitment list to confirm compatibility before ordering.
Key Features
- Genuine OEM Gear Geometry — manufactured to the original tooth profile and hardness specifications, delivering the same meshing precision as the factory-installed component
- Direct Drop-In Replacement — engineered to the original mounting dimensions, so this ring gear installs directly into the drive assembly without rework or custom fitting
- Broad Roller Coverage — fits BW 184 AD, BW 180 AD, BW 184 AD-2, BW 184 AD-2 AM, and BW 213 D-3 tandem and single drum rollers, plus BW 24 R pneumatic tyred rollers and C 850 C and C 560 B rollers, among others
- Restored Drive Efficiency — a properly functioning ring gear maintains full torque transfer to the drum or wheel, preserving compaction force and travel performance; a worn or cracked ring gear leads to slipping, noise, and accelerated drivetrain damage
- OEM Part Number Traceability — ordering by part number 31780885 ensures you receive the correct Bomag-sourced component, eliminating the guesswork that comes with cross-referenced or generic alternatives
The ring gear is a core element of the roller's drive system, transmitting rotational force from the motor or gearbox to the drum or wheel assembly. It works in constant mesh with a pinion or drive gear, and its tooth profile must be maintained within tight tolerances to transfer power efficiently without slipping or generating excessive heat. When a ring gear wears, chips, or cracks, the result is lost drive power, audible grinding, and — if left unaddressed — failure of surrounding drivetrain components, bringing compaction operations to a halt.
Part Details
| Part Number | 31780885 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Ring Gear |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 184 AD | 00810713, 00810715, 00817514 |
| Single Drum Roller | BW 177 D-3 | 00815310, 00817503 |
| Single Drum Roller | BW 212 D-3 | 00815325 |
| Single Drum Roller | BW 213 D-3 | 00815329, 00817522 |
| Single Drum Roller | BW 177 DH-3 | 00817505 |
| Single Drum Roller | BW 177 DH 3 | 00817506 |
| Single Drum Roller | BW 177 PDH-3 | 00817508 |
| Tandem Roller | BW 180 AD | 00817513 |
| Single Drum Roller | BW 213 PDH-3 | 00817529 |
| Pneumatic Tyred Roller | BW 24 R | 00817552, 00817854 |
| Single Drum Roller | BW177PDH 3 | 00817579 |
| Single Drum Roller | BW177DH-3 | 00817580 |
| Single Drum Roller | C 850 C | 00817583 |
| Single Drum Roller | BW177D-3 | 00817586 |
| Pneumatic Tyred Roller | C 560 B | 00817598 |
| Tandem Roller | BW 184 AD-2 AM | 00817600 |
| Single Drum Roller | BW 213 DH-3 USA | 00817671 |
| Single Drum Roller | BW 213 PDH-3 USA | 00817673 |
| Tandem Roller | BW 184 AD-2 | 00817841 |
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.
