The Wacker Neuson Auxiliary Pump is a genuine OEM component designed for RD12-90 and RD12A-90 series tandem rollers, including solid ROPS and foldable ROPS configurations. As a direct OEM replacement, this pump is manufactured to the same specifications as the original part — ensuring a proper fit and correct hydraulic function within the machine's auxiliary circuit. Compatible across multiple RD12 variants, the covers both the standard RD12-90 and the RD12A-90, making it the go-to choice for fleet operators and service technicians working across these models. Ordering by part number confirms you're getting the exact Wacker Neuson component your machine was built with.
Key Features
- OEM-Grade Hydraulic Tolerancing — Built to original pressure and flow specifications, ensuring the auxiliary circuit operates within designed parameters without under- or over-delivery.
- Drop-In Replacement — Matches the original mounting configuration and port layout of the RD12-90 and RD12A-90, connecting directly to existing hydraulic lines without rework.
- Broad RD12 Series Coverage — Fits multiple RD12-90 and RD12A-90 variants, including standard solid ROPS and foldable ROPS roller configurations.
- Sustained Compaction Performance — A properly functioning auxiliary pump maintains consistent pressure to ancillary systems, keeping drum vibration and steering response operating as intended. A failing pump causes sluggish response and uneven compaction output.
- Genuine Wacker Neuson OEM Part — Sourced directly through authorized Wacker Neuson supply channels, giving you full confidence in part authenticity and traceability.
The auxiliary pump supplies hydraulic flow to secondary systems on the roller — typically supporting functions such as steering, drum drive assist, or accessory circuits depending on the machine's configuration. It works alongside the main hydraulic pump to ensure ancillary demands don't starve the primary drive circuit. When the auxiliary pump wears or fails, operators may notice reduced steering responsiveness, erratic drum behavior, or complete loss of an ancillary function — all of which interrupt compaction work and can lead to further hydraulic system strain if left unaddressed.
Part Details
| Part Number | 5000183390 |
|---|---|
| Old Part Number | 0183390 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Auxiliary Pump |
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.
