The Bomag 05740849 Ring Gear is a genuine OEM component designed for Bomag BW 100, BW 120, BW 125, BW 115, and BW 131 tandem rollers. Sourced directly from Bomag, this ring gear meets the same dimensional and material standards as the part originally installed at the factory. It is confirmed to fit a broad range of tandem roller variants across the BW 100, BW 115, BW 120, BW 125, and BW 131 series, including AD and AC drive configurations across the -3, -4, and -5 generation models. When a ring gear wears or fails, prompt replacement with a correctly specified OEM part keeps the drivetrain performing as intended and avoids collateral damage to surrounding gear components.
Key Features
- OEM-Grade Tooth Geometry — manufactured to Bomag's exact tooth profile and hardness specifications, ensuring smooth load transfer and long service life in the drivetrain
- Direct Drop-In Replacement — matches the original mounting dimensions and spline or bolt pattern, so this ring gear seats correctly without modification
- Broad Tandem Roller Coverage — fits BW 100 AD-4, BW 100 AC-4, BW 100 AD-5, BW 100 AC-5, BW 115 AD-3, BW 115 AC-3, BW 120 AD-4, BW 120 AC-4, BW 120 AD-5, BW 120 AC-5, BW 125 AD-4, BW 125 AC-4, BW120AD 4, and BW 131 AD-5 tandem rollers
- Drivetrain Integrity — a correctly functioning ring gear maintains proper torque distribution across the drum drive, preventing slippage, uneven compaction, and premature wear on the pinion and adjacent components
- Genuine Bomag Part — supplied as an authentic OEM component under part number 05740849, giving you confidence in traceability and fitment accuracy for your Bomag tandem roller fleet
The ring gear is a core element of the drum drive assembly in a tandem roller, transmitting engine torque from the drive pinion to the drum to produce the rotation needed for propulsion and compaction. When the ring gear wears — typically through tooth erosion, chipping, or fatigue cracking — the drivetrain loses the ability to transfer power efficiently, resulting in drum slip, vibration, or complete loss of drive. Replacing a worn ring gear with a correctly specified part restores full torque capacity, protects surrounding drivetrain components from secondary damage, and ensures the roller delivers consistent compaction force across the mat.
Part Details
| Part Number | 05740849 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Ring Gear |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 100 AD-4 | 00817685, 00818465, 00824271, 00824273 |
| Tandem Roller | BW 100 AC-4 | 00817687, 00818467, 00818731 |
| Tandem Roller | BW 120 AD-4 | 00817689, 00818377, 00818469, 00818477, 00818593, 00818733, 00824173 |
| Tandem Roller | BW 120 AC-4 | 00817691, 00818471, 00818597 |
| Tandem Roller | BW 125 AD-4 | 00817937, 00818473 |
| Tandem Roller | BW 125 AC-4 | 00818271, 00818475 |
| Tandem Roller | BW120AD 4 | 00818595, 00818871 |
| Tandem Roller | BW 115 AC-3 | 00818693 |
| Tandem Roller | BW 115 AD-3 | 00818695 |
| Tandem Roller | BW 100 AD-5 | 00824029, 00824561 |
| Tandem Roller | BW 120 AC-5 | 00824031 |
| Tandem Roller | BW 120 AD-5 | 00824033, 00824563 |
| Tandem Roller | BW 100 AC-5 | 00824275 |
| Tandem Roller | BW 131 AD-5 | 00824935 |
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.
