The Bomag 05740445 Piston Ring is a genuine OEM component designed for Bomag tandem rollers, including the BW 80 AD-2, BW 90 AD-2, BW 100 ADM-2, BW 80 ADS, and BW 90 AC-2. Sourced directly from Bomag, this piston ring is manufactured to the same specifications as the original, ensuring a correct match to the engine's bore dimensions and ring groove tolerances. This piston ring is the right choice when restoring engine compression and sealing integrity on these tandem rollers, keeping your machine performing at the level it was engineered to deliver.
Key Features
- OEM-Grade Ring Material and Tolerancing — manufactured to Bomag's original metallurgical and dimensional specifications, delivering the correct ring tension, face profile, and end-gap clearance for sustained compression retention in the engine bore
- Direct Drop-In Replacement — engineered to match the original ring groove dimensions exactly, allowing straightforward installation during engine rebuild without secondary machining or fitting adjustments
- Broad Tandem Roller Coverage — fits the BW 80 AD-2, BW 90 AD-2, BW 100 ADM-2, BW 80 ADS, and BW 90 AC-2 tandem rollers, covering a wide range of Bomag's compact asphalt compaction lineup
- Restored Engine Compression and Sealing — a correctly seated piston ring maintains the combustion chamber seal that the engine depends on for full power output; worn or broken rings cause oil consumption, power loss, and hard starting
- Fuel System Efficiency Preserved — proper ring sealing prevents blow-by gases from contaminating crankcase oil and degrading combustion efficiency, protecting the engine from accelerated internal wear over extended service hours
The piston ring forms the critical seal between the piston and the cylinder wall inside the engine, containing combustion pressure and preventing oil from entering the combustion chamber. It also transfers heat away from the piston crown and into the cylinder wall, helping the engine manage operating temperatures during sustained compaction work. When a piston ring wears down, cracks, or loses tension, combustion gases escape past the piston — a condition known as blow-by — leading to reduced power, excessive oil consumption, increased exhaust smoke, and ultimately severe internal engine damage if left unaddressed.
Part Details
| Part Number | 05740445 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Piston Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 80 AD-2 | 00810280, 00817566 |
| Tandem Roller | BW 90 AD-2 | 00810281, 00817569, 00818041, 00818507 |
| Tandem Roller | BW 100 ADM-2 | 00817459 |
| Tandem Roller | BW 80 ADS | 00817567, 00818513 |
| Tandem Roller | BW 90 AC-2 | 00817568, 00818045 |
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.
