The Wacker Neuson 5100012843 is a genuine OEM Gear Motor designed for the RD40-130 and RD45-140 series tandem rollers. Sourced directly from Wacker Neuson, this part meets the exact engineering standards specified for these machines. Fitment covers the full RD40-130 and RD45-140 model families, including C, O, and US variants. Confirm your machine's model number before ordering to ensure a correct match.
Key Features
- Genuine OEM Hydraulic Output Integrity — Manufactured to Wacker Neuson's original torque and displacement specifications, ensuring the gear motor delivers consistent hydraulic power output to the drum drive system.
- Direct-Fit Replacement — Engineered to mount and port-connect exactly as the original unit, allowing a straightforward swap without custom adapters or machining.
- Broad RD-Series Coverage — Compatible with the full RD40-130 and RD45-140 tandem roller families, spanning C, O, and US market configurations across multiple serial number ranges.
- Sustained Drum Drive Performance — A correctly functioning gear motor maintains steady propulsion and drum rotation speed, which is critical for achieving uniform compaction density on asphalt and soil surfaces.
- Hydraulic System Integrity — As a pressurized hydraulic drive component, a worn or leaking gear motor can cause erratic drum movement, loss of propulsion, and potential hydraulic fluid loss — making timely replacement essential to safe machine operation.
A gear motor is a hydraulic motor combined with an internal gear reduction stage, converting hydraulic flow and pressure from the machine's hydraulic circuit into controlled rotational torque. On Wacker Neuson RD-series tandem rollers, the gear motor drives the compaction drums, giving the roller its propulsion and enabling precise speed control during asphalt and soil compaction passes. When a gear motor begins to fail — through internal wear, seal degradation, or housing damage — operators typically notice sluggish drum response, loss of tractive effort, or hydraulic fluid leaks at the motor ports. Replacing the unit promptly with a genuine OEM part restores full drive capability and prevents cascading damage to the broader hydraulic system.
Part Details
| Part Number | 5100012843 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Gear Motor |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD45-140o.3 | RD45-140o.3 | 5100047400 |
| RD45-140 O Tandem Roller | RD45-140O US | 5100021806 |
| RD40-130c | RD40-130c | 5100047384 |
| RD40-130 O | RD40-130 O | 5100011395 |
| RD45-140 C Tandem Roller | RD45-140C US | 5100021804 |
| RD45-140 Tandem Roller | RD45-140 US | 5100021802 |
| RD40-130 O Tandem Roller | RD40-130O US | 5100021805 |
| RD45-140 | RD45-140 | 5100047383, 5100011392 |
| RD45-140 C Tandem Roller | RD45-140 C | 5100011394 |
| RD40-130 C Tandem Roller | RD40-130 C | 5100011393 |
| RD40-130o | RD40-130o | 5100047386 |
| RD40-130 | RD40-130 | 5100047382 |
| RD45-140 O Tandem Roller | RD45-140 O | 5100011396 |
| RD40-130o.3 | RD40-130o.3 | 5100047399 |
| RD45-140c | RD45-140c | 5100047385 |
| RD40-130 Tandem Roller | RD40-130 US | 5100021801 |
| RD45-140o | RD45-140o | 5100047387 |
| RD40-130 C Tandem Roller | RD40-130C US | 5100021803 |
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.
