The Wacker Neuson is a genuine OEM Relief Valve designed for the RD12A-90 and RD12-90 series walk-behind tandem rollers. Sourced directly from Wacker Neuson, this part meets the exact pressure specifications required by the hydraulic system in these machines. It is confirmed to fit across multiple RD12A-90 and RD12-90 configurations, including solid ROPS and foldable ROPS variants. Replacing a faulty relief valve with the correct OEM part restores proper hydraulic circuit protection and keeps the roller operating within its designed pressure range.
Key Features
- Exact Hydraulic Pressure Rating — Manufactured to the original pressure relief specification for the RD12-series hydraulic circuit, ensuring the system opens and closes at the correct threshold.
- Genuine OEM Part — Supplied by Wacker Neuson; part number 5000165394 matches the factory-installed component with no substitution or re-engineering required.
- Broad RD12 Series Coverage — Fits RD12A-90 and RD12-90 tandem rollers across solid ROPS and foldable ROPS configurations.
- Protects the Hydraulic System — A correctly functioning relief valve prevents pressure spikes that can damage pumps, motors, and hoses; a failed or stuck valve can cause overheating, sluggish drum drive, or component failure.
- Hydraulic System Safety — An out-of-spec or leaking relief valve can allow uncontrolled pressure buildup in the hydraulic circuit, posing a risk to connected components and operators. Using the correct OEM-rated valve maintains safe operating pressures.
A relief valve is a pressure-control device within the hydraulic circuit that acts as a safety bypass. When hydraulic pressure in the system reaches a set limit, the valve opens to divert excess fluid back to the reservoir, preventing dangerous over-pressurization of pumps, hoses, and actuators. On a tandem roller like the RD12-series, the hydraulic system drives the drum propulsion and vibration, so a correctly calibrated relief valve is critical to smooth, consistent operation. When the valve fails — whether it sticks open, sticks closed, or begins leaking — the machine may lose drive force, overheat hydraulic fluid, or suffer damage to more expensive downstream components.
Part Details
| Part Number | 5000165394 |
|---|---|
| Old Part Number | 0165394 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Relief Valve |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD12A-90 ROLLER,DBL DRUM,GRN | RD12A-90 | 5000620369, 5000620058, 5000620320 |
| RD12-90 ROLLER, DOUBLE DRUM, SOLID ROPS | RD12-90 | 5000620059, 5000620321 |
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.
