The Bomag 05726978 Pinion is a genuine OEM component designed for BW 172 D-2 and BW 142 D-2 single drum rollers, as well as the BW 135 AD tandem roller. Sourced directly from Bomag, this pinion meets the same manufacturing standards as the original part it replaces, ensuring correct mesh geometry and load capacity from the first use. This pinion is a direct replacement for part number 05726978, making identification and ordering straightforward for fleet managers and service technicians alike.
Key Features
- Genuine OEM Gear Geometry — machined to the original tooth profile and hardness specification, delivering the correct mesh engagement that a drive system depends on for smooth, efficient power transfer
- Direct Drive-Train Replacement — drops into the existing gear assembly without modification, restoring the original gear interface between mating components
- Broad Roller Coverage — fits BW 172 D-2 and BW 142 D-2 single drum rollers and the BW 135 AD tandem roller, covering multiple machine classes from a single part number
- Sustained Power Transmission — a worn or chipped pinion causes slippage, noise, and accelerated wear on mating gears; replacing it promptly keeps the drive train transferring full torque to the drum
- Authentic Bomag Part — supplied as a genuine Bomag component, so fitment and material grade are backed by the OEM, not approximated from reverse-engineered dimensions
A pinion is a small-diameter gear that meshes with a larger ring gear or rack to transmit rotational force through a drive system. In Bomag rollers, the pinion plays a central role in transferring engine or motor power to the drum, controlling both propulsion and vibratory drive depending on its location in the drivetrain. When a pinion wears, chips, or loses tooth integrity, the result is lost drive efficiency, audible gear noise, and rapid degradation of the surrounding gear components — making timely replacement critical to keeping the machine operating at full compaction output.
Part Details
| Part Number | 05726978 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Pinion |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Single Drum Roller | BW 172 D-2 | 00810074 |
| Single Drum Roller | BW 142 D-2 | 00810077 |
| Tandem Roller | BW 135 AD | 00810120 |
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.
