The Wacker Neuson Piston (0.75) is a genuine OEM component designed for the RD12A-90 Tandem Roller series, including the standard, Foldable ROPS, and double drum configurations. As a factory-sourced part, it is manufactured to the same tolerances and material specifications as the original, ensuring a drop-in fit within the hydraulic or engine assembly it serves. This OEM designation means no guesswork on compatibility — the is the exact part Wacker Neuson specifies for these machines. Confirm your model number against the fitment list before ordering to ensure a match.
Key Features
- OEM Bore Tolerance: — Manufactured to the precise 0.75 sizing spec, maintaining the correct clearance and compression characteristics critical to proper piston function.
- Direct-Fit Replacement: — Engineered to install in place of the original without reworking bores, seals, or mounting interfaces on the RD12A-90.
- Verified RD12A-90 Fitment: — Compatible across standard, Foldable ROPS, and double drum variants of the RD12A-90 Tandem Roller lineup.
- Sustained Compaction Output: — A properly sized piston maintains the pressure differential needed to deliver consistent drum vibration and compaction force; a worn or incorrectly sized piston degrades compaction performance and can cause erratic drum behavior.
- Genuine Wacker Neuson Part: — Sourced directly from Wacker Neuson, carrying the same part number — 5000214858 — used in factory assembly and authorized service.
A piston converts hydraulic or combustion pressure into mechanical motion, forming the core of the pump, motor, or engine cylinder it operates within. In a tandem roller like the RD12A-90, correctly functioning pistons are essential to maintaining consistent hydraulic pressure for drum drive and vibration systems. When a piston wears beyond its service tolerance, pressure loss follows — leading to reduced compaction force, uneven drum speed, or complete loss of drive in hydraulic circuit applications.
Part Details
| Part Number | 5000214858 |
|---|---|
| Old Part Number | 0214858 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston (0.75) |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD12A-90 Tandem Roller | RD12A-90 | 5000620058, 5000620320, 5000620369 |
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.
