The Wacker Neuson ST #8 ORB #4 ORFS Fitting is a genuine OEM hydraulic fitting designed for RD12A-90 and RD12-90 series tandem rollers. As a factory-sourced component, is manufactured to the same specifications as the original part, ensuring a correct, leak-free connection within the hydraulic circuit. This fitting is confirmed compatible across multiple RD12-series configurations, including solid ROPS and foldable ROPS variants. Keeping the hydraulic system properly sealed is critical to maintaining consistent drum drive performance and protecting downstream components.
Key Features
- Genuine OEM Hydraulic Integrity — Factory-sourced fitting maintains the correct thread form and sealing geometry for a pressure-tight hydraulic connection, with no risk of thread mismatch or seal incompatibility.
- Straight #8 ORB to #4 ORFS Thread Configuration — Transitions between an O-Ring Boss port and a flat-face O-Ring Face Seal line end, matching the original hydraulic plumbing layout on the RD12 series.
- Broad RD12 Series Coverage — Fits RD12A-90 and RD12-90 tandem rollers across solid ROPS and foldable ROPS configurations, covering a wide range of current RD12 production variants.
- Leak-Free Hydraulic Performance — A worn or damaged fitting at this junction can cause hydraulic fluid loss, pressure drop, and erratic or failed drum drive response; replacing with the correct OEM part restores full system pressure and control.
- Direct Sourced Replacement — Carries the Wacker Neuson part number 5000163962, allowing straightforward cross-reference against your machine's parts manual for confident installation.
A hydraulic fitting serves as the threaded connector between rigid ports and flexible or hard-line hydraulic circuits, forming a sealed junction that allows pressurized fluid to pass without leakage. On a tandem roller like the RD12A-90 and RD12-90, the hydraulic system powers drum drive, vibration, and steering functions, so every fitting in the circuit must maintain its seal under sustained operating pressure. When a fitting fails — through thread wear, corrosion, or seal degradation — hydraulic fluid loss leads to pressure drop, sluggish or unresponsive drum drive, and potential damage to pumps and motors further down the circuit.
Part Details
| Part Number | 5000163962 |
|---|---|
| Old Part Number | 0163962 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | ST #8 ORB #4 ORFS Fitting |
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.
