The Wacker Neuson 5100011678 is a genuine OEM Gear Pump designed for the RD18, RD24, and RD27 series tandem rollers. As a factory-sourced component, it meets the exact specifications required to restore full hydraulic system performance across a wide range of RD-series machines — including C, O, SE, and US configurations. Fitment covers models such as the RD18-80, RD18-100, RD24-100, and RD27-120 in both current and legacy variants. Choosing the correct OEM gear pump ensures the hydraulic circuit operates at the pressures and flow rates the machine was engineered to deliver.
Key Features
- Genuine OEM Flow and Pressure Matching — Manufactured to Wacker Neuson's exact displacement and port specifications, so hydraulic pressure and flow output remain within the design envelope of the RD-series drum drive system.
- Direct-Fit Replacement — Mounts to the existing hydraulic circuit with OEM-matched port sizing and bolt pattern, supporting a straightforward swap on RD18, RD24, and RD27 platforms.
- Broad RD-Series Coverage — Fits a wide range of RD18, RD24, and RD27 tandem roller variants, including C, O, SE, and US configurations across multiple production series.
- Sustained Drum Drive Reliability — A properly functioning gear pump maintains consistent hydraulic flow to the drum drive motors; a worn or failing pump causes erratic propulsion, loss of compaction force, and potential drum stall.
- Hydraulic System Integrity — Using a correctly rated gear pump prevents pressure fluctuations that can stress downstream valves, motors, and hoses — protecting the broader hydraulic circuit from secondary damage.
A gear pump is the primary hydraulic power source in the RD-series tandem roller's propulsion and vibration circuit. It converts mechanical input from the engine into pressurized hydraulic flow, which drives the drum motors and vibratory system that deliver compaction force to the surface. When a gear pump wears internally — through scoring of the gears or housing — flow efficiency drops, hydraulic pressure becomes inconsistent, and the machine loses the propulsion or vibration output needed for effective asphalt and soil compaction. Replacing a degraded pump with a correctly specified OEM unit restores the system to its designed operating parameters.
Part Details
| Part Number | 5100011678 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Gear Pump |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD27-120 C Tandem Roller | RD27-120 C | 5100011388 |
| RD18-80.3 | RD18-80.3 | 5100055946 |
| RD18-80 Tandem Roller | RD18-80 US | 5100027572 |
| RD27-120 O Tandem Roller | RD27-120 O | 5100011390 |
| RD27-120c | RD27-120c.3 | 5100047371 |
| RD18-100 C Tandem Roller | RD18-100 C | 5100011384 |
| RD18-100c.3 | RD18-100c.3 | 5100055948 |
| RD24-100 O Tandem Roller | RD24-100 O | 5100011389 |
| Vibration Roller | RD18-100c 3 | 5100047363 |
| RD24-100 C Tandem Rollers | RD24-100 C | 5100011387 |
| RD27-120o | RD27-120o.3 | 5100047373 |
| Vibration Roller | RD18-100 SE | 5100044989 |
| RD18-100 | RD18-100 | 5100055775, 5100011383, 5100047361 |
| RD27-120 Tandem Roller | RD27-120 | 5100011386 |
| RD24-100o.3 | RD24-100o.3 | 5100047372 |
| RD18-100 Tandem Roller | RD18-100 US | 5100027573 |
| RD18-80 Tandem Roller | RD18-80 | 5100011382, 5100047360, 5100055774 |
| RD18 | RD18-100.3 | 5100055947 |
| RD24-100c.3 | RD24-100c.3 | 5100047370 |
| RD18-100c | RD18-100c | 5100055776, 5100047362 |
| RD24-100 Tandem Roller | RD24-100 | 5100011385 |
| RD27-120 | RD 27-120.3 | 5100032198 |
| RD 24-100.3 | RD 24-100.3 | 5100032197 |
| RD18-100 C Tandem Roller | RD18-100 C US | 5100027574 |
| Vibration Roller | RD18-80 SE | 5100044988 |
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.
