The Wacker Neuson Compensator Tank is a genuine OEM compensator tank designed for the RD40-130 and RD45-140 series tandem rollers, including standard, C, O, and.3 variant configurations. Sourced directly from Wacker Neuson, this part meets the exact engineering standards of the original component it replaces. It fits across the full RD40-130 and RD45-140 model range, covering serial-specific builds such as the RD40-130 C, RD45-140 C, RD40-130 O, RD45-140 O, and their.3 counterparts. When your compensator tank is worn, leaking, or damaged, replacing it with the correct OEM part keeps the hydraulic system operating as intended.
Key Features
- Genuine OEM Hydraulic Integrity — Manufactured to Wacker Neuson's original design tolerances, ensuring proper fluid capacity, pressure handling, and seal compatibility specific to the RD-series drum drive system.
- Direct Drop-In Replacement — Engineered to match the original mounting points and hydraulic line connections, allowing straightforward installation without rework or adapters.
- Broad RD-Series Fitment — Compatible with twelve distinct RD40-130 and RD45-140 configurations, including standard, C, O, and .3 variants, making this a versatile stock item for mixed fleets.
- Protects Drum Drive Performance — A fully functional compensator tank maintains correct hydraulic fluid volume and system pressure, supporting smooth, consistent drum rotation and compaction output.
- Hydraulic System Safety — A compromised or leaking compensator tank can cause pressure fluctuations that stress hydraulic components and create unpredictable machine behavior; using the correct OEM replacement restores system stability.
The compensator tank is a hydraulic reservoir component that absorbs volume changes in the hydraulic fluid caused by temperature variation and system pressure cycles — essentially acting as a buffer that keeps the closed-loop drum drive circuit balanced and pressurized correctly. On tandem rollers like the RD40-130 and RD45-140, maintaining that hydraulic balance is critical to even drum speed and compaction consistency across the full pass. When the compensator tank fails or develops a leak, the hydraulic circuit loses its ability to compensate for fluid expansion and contraction, which can lead to erratic drum behavior, accelerated wear on pump and motor components, and potential system shutdown.
Part Details
| Part Number | 5100012300 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Compensator Tank |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD40-130 Tandem Roller | RD40-130 | 5100011391 |
| RD45-140 Tandem Roller | RD45-140 | 5100011392 |
| 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 |
| RD40-130.3 | 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 |
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.
