The Bomag 05877178 Pressure Relief Valve is a genuine OEM component designed for Bomag BW 100, BW 120, BW 125, BW 131, BW 135, and BW 138 series tandem rollers. Sourced directly from Bomag, this valve carries the same specifications as the part installed at the factory, ensuring a correct, dependable fit for your machine. It is compatible across a wide range of tandem roller variants including the BW 100 AD-3, BW 100 AD-4, BW 100 AC-4, BW 120 AD-3, BW 120 AC-3, BW 120 AD-4, BW 120 AC-4, BW 125 ADH, BW 125 AD-4, BW 125 AC-4, BW 131 ACW-2, BW 135 AD, BW 138 AC, BW 138 AD, and BW 138-AD. Replacing a worn or failed pressure relief valve with part number 05877178 restores proper hydraulic system protection and helps keep your tandem roller running within safe operating parameters.
Key Features
- Genuine OEM Hydraulic Precision — manufactured to Bomag's exact pressure tolerancing spec, ensuring the valve opens and closes at the correct set point for this hydraulic circuit
- Direct Drop-In Replacement — this valve matches the original port size, thread pitch, and pressure rating, so it installs directly in place of the factory unit without adaptation
- Broad Tandem Roller Coverage — fits BW 100, BW 120, BW 125, BW 131, BW 135, and BW 138 series tandem rollers across multiple generation variants, including -3 and -4 generation models
- Hydraulic System Protection — a correctly functioning pressure relief valve prevents dangerous over-pressurization; a failed or stuck valve can cause hose failures, pump damage, or loss of drive control
- Operational Safety — in a hydraulic drive system, an out-of-spec relief valve is a safety concern; this genuine OEM part ensures the system relieves pressure exactly as Bomag intended
A pressure relief valve acts as a safety guard within the hydraulic system, automatically diverting fluid flow when pressure exceeds a set limit — protecting pumps, motors, hoses, and other downstream components from damage caused by over-pressurization. On Bomag tandem rollers, the hydraulic circuit powers both propulsion and vibration functions, making a properly calibrated relief valve essential to smooth, controlled operation on the asphalt. When this valve wears, sticks open, or fails to seat correctly, the machine may exhibit sluggish drive response, erratic vibration output, or — in serious cases — hydraulic component failure that takes the roller out of service entirely.
Part Details
| Part Number | 05877178 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Pressure Relief Valve |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 100 AD-3 | 00817458 |
| Tandem Roller | BW 120 AC-3 | 00817462 |
| Tandem Roller | BW 120 AD-3 | 00817463, 00817831, 00817833 |
| Tandem Roller | BW 125 ADH | 00817467 |
| Tandem Roller | BW 131 ACW-2 | 00817468 |
| Tandem Roller | BW 135 AD | 00817471, 00818357 |
| Tandem Roller | BW 138 AC | 00817472, 00818361 |
| Tandem Roller | BW 138 AD | 00817473, 00818359 |
| Tandem Roller | BW120AD 3 | 00817571 |
| Tandem Roller | BW 138-AD | 00817572, 00818389 |
| Tandem Roller | BW 100 AD-4 | 00817685, 00818465 |
| Tandem Roller | BW 100 AC-4 | 00817687, 00818467 |
| Tandem Roller | BW 120 AD-4 | 00817689, 00818377, 00818469, 00818477, 00818593 |
| Tandem Roller | BW 120 AC-4 | 00817691, 00818471, 00818597 |
| Tandem Roller | BW120 AD-3 | 00817849 |
| Tandem Roller | BW 125 AD-4 | 00817937, 00818473 |
| Tandem Roller | BW 125 AC-4 | 00818271, 00818475 |
| Tandem Roller | BW120AD 4 | 00818595, 00818871 |
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.
