The Wacker Neuson Gear Pump is a genuine OEM gear pump designed for the RD40-130 and RD45-140 series tandem rollers, covering standard, C, O, US, DPF, and.3 variants across the full production range. As a factory-sourced component, it meets the exact build specifications of the original part — so there's no guesswork on fit or function when it's time to get your roller back to work. This pump is compatible with a wide span of RD40-130 and RD45-140 configurations, making it the dependable choice whether you're servicing an older unit or a current DPF-compliant machine. Keep part number on hand and you'll have the right pump ready when you need it.
Key Features
- Genuine OEM Hydraulic Output Integrity — Sourced directly from Wacker Neuson, this gear pump delivers the displacement and pressure characteristics the hydraulic circuit was engineered around — no flow-rate compromises.
- Drop-In Port Alignment — Inlet and outlet ports match the original pump's dimensions exactly, allowing straightforward line reconnection without adapters or rework.
- Broad RD Series Coverage — Fits RD40-130 and RD45-140 tandem rollers across standard, C (combination), O (offset), US, DPF, and .3 build variants — one part number serves the entire family.
- Sustained Compaction Force — A properly functioning gear pump maintains consistent hydraulic pressure to the vibratory and propulsion circuits; a worn pump causes erratic drum speed, weak vibration amplitude, and uneven compaction results.
- Hydraulic System Protection — OEM-spec internal clearances prevent bypass leakage that can overheat hydraulic fluid and accelerate wear on downstream valves and motors — critical in high-cycle paving and compaction environments.
A gear pump is the hydraulic heart of the tandem roller's drive and vibration system. It draws fluid from the reservoir and pushes it under pressure through the machine's hydraulic circuits, powering drum propulsion, vibratory mechanisms, and steering functions. When a gear pump begins to wear — through internal gear erosion or seal degradation — pressure drops, the machine loses tractive effort, vibration becomes inconsistent, and the entire hydraulic system is placed under thermal stress. Replacing a failing pump promptly with the correct OEM unit restores full hydraulic output and protects the rest of the system from secondary wear damage.
Part Details
| Part Number | 5100025077 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Gear Pump |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD40-130 Tandem Roller | RD40-130 | 5100011391, 5100047382 |
| RD45-140 Tandem Roller | RD45-140 | 5100011392, 5100047383 |
| RD40-130 C Tandem Roller | RD40-130 C | 5100011393 |
| RD45-140 C Tandem Roller | RD45-140 C | 5100011394 |
| RD40-130 O | RD40-130 O | 5100011395 |
| RD45-140 O Tandem Roller | RD45-140 O | 5100011396 |
| RD40-130 Tandem Roller | RD40-130 US | 5100021801 |
| RD45-140 Tandem Roller | RD45-140 US | 5100021802 |
| RD40-130 C Tandem Roller | RD40-130C US | 5100021803 |
| RD45-140 C Tandem Roller | RD45-140C US | 5100021804 |
| RD40-130 O Tandem Roller | RD40-130O US | 5100021805 |
| RD45-140 O Tandem Roller | RD45-140O US | 5100021806 |
| RD40-130c | RD40-130c | 5100047384 |
| RD45-140c | RD45-140c | 5100047385 |
| RD40-130o | RD40-130o | 5100047386 |
| RD45-140o | RD45-140o | 5100047387 |
| RD40-130.3 | RD40-130.3 | 5100047395 |
| RD45-140.3 | RD45-140.3 | 5100047396 |
| RD40-130c.3 | RD40-130c.3 | 5100047397 |
| RD45-140c.3 | RD45-140c.3 | 5100047398 |
| RD40-130o.3 | RD40-130o.3 | 5100047399 |
| RD45-140o.3 | RD45-140o.3 | 5100047400 |
| RD40-130 DPF | RD40-130 DPF | 5100055777 |
| RD45-140 DPF | RD45-140 DPF | 5100055778 |
| RD40-130c DPF | RD40-130c DPF | 5100055779 |
| RD45-140c DPF | RD45-140c DPF | 5100055780 |
| RD40-130o DPF | RD40-130o DPF | 5100055781 |
| RD45-140o DPF | RD45-140o DPF | 5100055782 |
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.
