The Bomag 05741857 Piston is a genuine OEM Piston designed for Bomag tandem rollers across the BW 100, BW 115, BW 120, BW 125, BW 131, BW 135, and BW 138 series. As a direct OEM replacement, this piston is manufactured to the same specifications as the original, ensuring a correct fit in compatible machines including the BW 100 AD-4, BW 120 AD-5, BW 125 AC-4, BW 138 AD-5, and BW 131 AD-5, among others. This component is sourced directly from Bomag, so buyers can order with confidence knowing the part number 05741857 matches their machine's original specification.
Key Features
- OEM-Grade Dimensional Accuracy — manufactured to Bomag's original tolerances, ensuring proper compression sealing and consistent stroke performance within the cylinder assembly
- Direct Drop-In Replacement — engineered to install directly in place of the original piston, aligning correctly with existing rings, pins, and cylinder bore geometry
- Broad Tandem Roller Coverage — fits Bomag BW 100, BW 115, BW 120, BW 125, BW 131, BW 135, and BW 138 tandem rollers across AC and AD variants in the -3, -4, and -5 generations
- Sustained Compression Integrity — a correctly fitted piston maintains the cylinder pressure needed for consistent engine output, keeping the roller performing at rated compaction force
- Genuine Bomag Part — supplied as genuine OEM, this piston carries Bomag's part number 05741857 and meets the same material and dimensional standards as the component originally installed at the factory
The piston is a core reciprocating component within the engine cylinder, responsible for compressing the air-fuel mixture and transferring combustion force to the crankshaft via the connecting rod. In a tandem roller like the BW 120 or BW 138 series, the engine must deliver consistent power to drive both drums and maintain compaction output across the full working shift. When a piston becomes worn, scored, or cracked, compression drops, fuel efficiency suffers, and the engine may run roughly or lose power — making timely replacement essential to keeping the machine productive on the jobsite.
Part Details
| Part Number | 05741857 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Piston |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 100 AD-4 | 00818465, 00824271, 00824273 |
| Tandem Roller | BW 100 AC-4 | 00818467, 00818731 |
| Tandem Roller | BW 120 AD-4 | 00818469, 00818477, 00818593, 00818733, 00824173 |
| Tandem Roller | BW 120 AC-4 | 00818471, 00818597 |
| Tandem Roller | BW 125 AD-4 | 00818473 |
| Tandem Roller | BW 125 AC-4 | 00818475 |
| Tandem Roller | BW120AD 4 | 00818595, 00818871 |
| Tandem Roller | BW 115 AC-3 | 00818693 |
| Tandem Roller | BW 115 AD-3 | 00818695 |
| Tandem Roller | BW 138 AC-5 | 00818719 |
| Tandem Roller | BW 138 AD-5 | 00818721, 00824175 |
| Tandem Roller | BW 135 AD-5 | 00818723 |
| 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.
