The Bomag 05712900 Voltage Regulator is a genuine OEM component designed for a wide range of Bomag tandem rollers and single drum rollers, including BW 100, BW 120, BW 124, BW 138, BW 141, BW 144, BW 145, BW 151, BW 154, and BW 177 series machines, as well as C 815 C and C 825 C single drum rollers. Sourced directly from Bomag, this voltage regulator matches the original unit exactly, ensuring the correct output specification for your machine's charging system. This is a drop-in replacement that installs to the same mounting points as the factory unit, with no adaptation needed. When your roller's electrical system needs attention, ordering by part number 05712900 confirms you're getting the right component the first time.
Key Features
- OEM-Matched Output Regulation — delivers the precise charge voltage required by Bomag's electrical architecture, protecting the battery and onboard electronics from over- or under-charging
- Direct-Fit Replacement — engineered to the same connector type, mounting configuration, and output curve as the original unit for straightforward installation
- Broad Fitment Coverage — fits a wide range of Bomag BW-series tandem rollers and single drum rollers, including BW 100 AC-3, BW 120 AD-3, BW 145 DH-3, BW 177 D-4, C 815 C, C 825 C, and many more variants
- Charging System Integrity — a worn or failed voltage regulator causes erratic charging, battery drain, and electrical faults that can sideline the machine; this part restores stable, consistent output
- Electrical System Safety — an out-of-spec regulator can overcharge the battery or starve sensitive control circuits; using the correct OEM-spec component keeps the charging system operating within safe parameters
A voltage regulator controls the output of the alternator, maintaining a steady charge voltage to the battery and electrical system regardless of engine speed or load. Without a properly functioning regulator, the alternator may deliver too much or too little voltage — leading to battery failure, warning light faults, or damage to sensitive electronic controls on the machine. On Bomag rollers, where reliable electrical performance directly affects compaction system controls and operator safety features, keeping this component in good working order is essential to consistent machine operation.
Part Details
| Part Number | 05712900 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Voltage Regulator |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 100 AC-3 | 00817457 |
| Tandem Roller | BW 100 AD-3 | 00817458 |
| Tandem Roller | BW 120 AC-3 | 00817462 |
| Tandem Roller | BW 120 AD-3 | 00817463, 00817831, 00817833 |
| Single Drum Roller | BW 124 DH-3 | 00817464, 00817634 |
| Single Drum Roller | BW 124 PDH-3 | 00817465 |
| Tandem Roller | BW 125 ADH | 00817467 |
| Tandem Roller | BW 135 AD | 00817471, 00818357 |
| Tandem Roller | BW 138 AC | 00817472, 00818361 |
| Tandem Roller | BW 138 AD | 00817473, 00818359 |
| Tandem Roller | BW 141 AD-2 | 00817474 |
| Tandem Roller | BW 144 AD-2 | 00817477, 00817478 |
| Single Drum Roller | BW 145 D-3 | 00817479, 00817637 |
| Single Drum Roller | BW 145 DH-3 | 00817481, 00817638 |
| Single Drum Roller | BW 145 PDH-3 | 00817483, 00817639 |
| Tandem Roller | BW 151 AC-2 | 00817485 |
| Tandem Roller | BW 151 AD-2 | 00817486 |
| Tandem Roller | BW 154 AD-2 | 00817490, 00817491, 00817599 |
| Tandem Roller | BW120AD 3 | 00817571 |
| Tandem Roller | BW 138-AD | 00817572, 00818389 |
| Tandem Roller | BW141AD 2 | 00817573 |
| Single Drum Roller | BW124PDH 3 | 00817574, 00818025 |
| Single Drum Roller | C 815 C | 00817575 |
| Single Drum Roller | BW145D 3 | 00817576, 00817927 |
| Single Drum Roller | BW145PDH 3 | 00817577 |
| Single Drum Roller | C 825 C | 00817578 |
| Tandem Roller | BW120 AD-3 | 00817849 |
| Single Drum Roller | BW 145-DH-3 | 00817929 |
| Single Drum Roller | BW 124 DH-4 | 00818295, 00824495, 00824709 |
| Single Drum Roller | BW 124 PDH | 00818297 |
| Single Drum Roller | BW124DH 4 | 00818311 |
| Single Drum Roller | BW145DH 40 | 00818323, 00818939, 00818941 |
| Single Drum Roller | BW 145 DH 40 BW 145 DH 4 | 00818325 |
| Single Drum Roller | BW 145 PDH 40 BW145 PDH 4 | 00818327 |
| Single Drum Roller | BW 177 D-4 | 00818451 |
| Single Drum Roller | BW 124 DH-40 | 00818521, 00824499 |
| Single Drum Roller | BW 124 PDH-40 | 00818523, 00824497 |
| Single Drum Roller | C815D | 00818569 |
| Single Drum Roller | BW124PDH-40 | 00818571 |
| Single Drum Roller | BW145D 40 | 00818935, 00818937 |
| Single Drum Roller | BW145PDH 40 | 00818943 |
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.
