The Wacker Neuson 5100012184 is a genuine OEM Gear Motor designed for the RD40-130 and RD45-140 series tandem rollers. As a direct OEM replacement, this part is produced to the same specifications as the original component installed at the factory, ensuring a proper fit within your machine's drive system. Fitment covers a wide range of RD40-130 and RD45-140 variants, including Open-ROPS, Canopy, and.3-generation models in both standard and US-market configurations. Keeping this component in good working order is essential for maintaining consistent drum drive performance on the job.
Key Features
- Genuine OEM Construction — Manufactured to original equipment tolerances, ensuring correct hydraulic flow rates and mechanical output for the drum drive circuit.
- Drop-In Installation — Matches the original port configuration and mounting interface of the RD40-130 and RD45-140 drive systems, allowing straightforward replacement without modification.
- Broad RD-Series Fitment — Compatible with RD40-130 and RD45-140 tandem rollers across Open-ROPS, Canopy, and .3-generation variants in standard and US-market configurations.
- Sustained Drive Output — A properly functioning gear motor delivers consistent torque to the compaction drum; a worn or failing unit can cause sluggish drum response, uneven compaction passes, or complete loss of drive.
- Hydraulic System Integrity — OEM-spec internal clearances help prevent internal leakage that can lead to overheating, pressure loss, and damage to connected hydraulic components.
The gear motor is a hydraulic-to-mechanical conversion component within the roller's drum drive circuit. It receives pressurized hydraulic fluid from the machine's pump and converts that energy into rotational torque to drive the compaction drum. When a gear motor begins to wear internally, common symptoms include reduced drum speed, excessive heat buildup in the hydraulic system, and inconsistent compaction output — all of which affect the quality of the finished asphalt or soil surface. Replacing a worn unit with a genuine OEM part restores full drive performance and protects the broader hydraulic circuit from cascading wear.
Part Details
| Part Number | 5100012184 |
|---|---|
| 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 |
| RD45-140.3 | RD45-140.3 | 5100047396 |
| RD40-130 O | RD40-130 O | 5100011395 |
| RD40-130.3 | RD40-130.3 | 5100047395 |
| RD45-140 C Tandem Roller | RD45-140C US | 5100021804 |
| RD40-130c.3 | RD40-130c.3 | 5100047397 |
| RD45-140 Tandem Roller | RD45-140 US | 5100021802 |
| RD40-130 O Tandem Roller | RD40-130O US | 5100021805 |
| RD45-140 C Tandem Roller | RD45-140 C | 5100011394 |
| RD40-130 C Tandem Roller | RD40-130 C | 5100011393 |
| RD40-130 Tandem Roller | RD40-130 | 5100011391 |
| RD45-140 O Tandem Roller | RD45-140 O | 5100011396 |
| RD45-140c.3 | RD45-140c.3 | 5100047398 |
| RD40-130o.3 | RD40-130o.3 | 5100047399 |
| RD40-130 Tandem Roller | RD40-130 US | 5100021801 |
| RD40-130 C Tandem Roller | RD40-130C US | 5100021803 |
| RD45-140 Tandem Roller | RD45-140 | 5100011392 |
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.
