The Wacker Neuson Plug Fitting 1 NPT Hex Head is a genuine OEM component designed for the RD12, RD11, and RD880 series tandem rollers. As a direct OEM part, is manufactured to the exact thread specification and hex head dimensions required by Wacker Neuson's double drum vibratory roller hydraulic and fluid systems. This fitting is confirmed to fit multiple RD12A-90, RD12-90, RD11A, RD11V, RD11AEC, and RD880V configurations, including foldable ROPS variants. Having the correct plug fitting on hand keeps your roller's fluid system properly sealed and ready for the next compaction pass.
Key Features
- Genuine OEM Thread Integrity — Manufactured to exact 1 NPT thread form and pitch, ensuring a leak-free seal in hydraulic or fluid circuit ports on Wacker Neuson tandem rollers.
- Hex Head Design for Positive Torque — The hex head profile allows standard wrench engagement, making installation and removal straightforward during service without risk of rounding.
- Broad RD-Series Fitment — Confirmed for RD12A-90, RD12-90, RD11A, RD11V, RD11AEC, and RD880V double drum vibratory rollers, including both solid and foldable ROPS configurations.
- Fluid System Protection — A correctly seated plug fitting prevents fluid loss and contamination ingress at open ports, protecting the roller's hydraulic or fluid circuits from pressure loss or external debris.
- OEM Part Number Confidence — Sourced directly from Wacker Neuson, part 5000078305 carries the correct OEM part number for accurate identification during maintenance and parts ordering.
A plug fitting seals an unused or temporarily open threaded port in a machine's hydraulic, lubrication, or fluid system. On double drum vibratory rollers like the RD12 and RD11 series, these ports appear throughout the drum drive, vibration, and hydraulic circuits, and an improperly sealed port can allow fluid to escape or allow contamination to enter under operating pressures. When a plug fitting fails — through corrosion, thread damage, or an improper replacement — it can lead to fluid leaks that compromise hydraulic performance or cause accelerated wear on internal components. Using the correct OEM-specified fitting for the port's thread size and style ensures a reliable, pressure-rated seal every time.
Part Details
| Part Number | 5000078305 |
|---|---|
| Old Part Number | 0078305 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Plug Fitting 1 NPT Hex Head |
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 |
| Hydrostatic Double Drum Vibrat ory Roller | RD11AEC | 5000007695 |
| Hydrostatic Double Drum Vibrat ory Roller | RD11V | 5000007694 |
| Hydrostatic Double Drum Vibrat ory Roller | RD11A | 5000007693 |
| Double Drum Vibratory Roller | RD880V | 5000006736 |
| Drum | Drum | 5100057581 |
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.
