The Bomag 78003074 Wire Harness is a genuine OEM component designed for Bomag BW-series tandem rollers, including the BW 100 AC-3, BW 100 AD-3, BW 120 AC-3, BW 120 AD-3, BW 120 AD-3, BW 125 ACH, BW 125 ADH, BW 135 AC, BW 135 AD, BW 138 AC, and BW 138 AD. Sourced directly from Bomag, this wire harness matches the original assembly exactly — correct connector types, correct routing lengths, and correct insulation grades for the operating environment of a ride-on tandem roller. Verified fitment across this range of tandem rollers means no guesswork when it comes time to restore electrical integrity to your machine.
Key Features
- OEM Electrical Integrity — manufactured to Bomag's original wiring specifications, with matched connector terminals and insulation ratings designed specifically for tandem roller electrical systems
- Direct Plug-In Replacement — connectors, harness lengths, and routing geometry mirror the original installation, allowing the harness to seat into existing brackets and junction points without alteration
- Broad Tandem Roller Coverage — fits BW 100, BW 120, BW 125, BW 135, and BW 138 tandem rollers across multiple drive and drum configurations, including AC and AD variants
- Restores Full Electrical Function — a damaged or degraded wire harness causes intermittent sensor faults, control failures, and instrument errors; this replacement brings all circuits back to designed operating condition
- Electrical Safety Compliance — correct insulation grade and shielding protect against short circuits and voltage irregularities in a high-vibration compaction environment, supporting safe machine operation
The wire harness is the central nervous system of the machine's electrical architecture, bundling and routing power and signal cables between the engine, controls, sensors, and operator display. On tandem rollers like the BW 138 AD and BW 120 AD-3, a healthy harness ensures that every system — from drum vibration control to travel drive — receives clean, uninterrupted signals. When a harness degrades through abrasion, heat, or moisture ingress, the result is unpredictable electrical faults that are difficult to trace and can sideline the machine entirely. Replacing the harness with an OEM part number 78003074 eliminates that uncertainty and restores dependable electrical communication throughout the roller.
Part Details
| Part Number | 78003074 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Wire Harness |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Tandem Roller | BW 138 AD | 00810191, 00817473, 00818359 |
| 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, 00817833 |
| Tandem Roller | BW 125 ACH | 00817466 |
| Tandem Roller | BW 125 ADH | 00817467 |
| Tandem Roller | BW 135 AC | 00817470 |
| Tandem Roller | BW 135 AD | 00817471, 00818357 |
| Tandem Roller | BW 138 AC | 00817472, 00818361 |
| Tandem Roller | BW120AD 3 | 00817571 |
| Tandem Roller | BW 138-AD | 00817572, 00818389 |
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.
