The Wacker Neuson ST #6 ORFS #5 ORB Fitting is a genuine OEM hydraulic fitting designed for RD16 and RD27 series tandem rollers. As a direct-from-manufacturer component, is produced to the exact thread form, seat angle, and port geometry required by the hydrostatic drive circuits found in these ride-on rollers. Fitment covers a wide range of RD16-90, RD16-100, RD27-100, and RD27-120 configurations, including Pro and Basic Tier 4 Final variants. Sourcing the correct OEM fitting ensures a leak-free, pressure-rated connection the first time — no chasing hydraulic faults after reassembly.
Key Features
- OEM Thread and Port Accuracy — Manufactured to the exact #6 ORFS (O-Ring Face Seal) and #5 ORB (O-Ring Boss) specifications, ensuring a properly sealed, pressure-rated hydraulic connection without improvised adapters.
- Direct Hydraulic Circuit Replacement — Installs directly into the hydrostatic drive or auxiliary hydraulic circuit of the host machine, mating to existing ports and lines without modification to fittings or hose ends.
- Broad RD16 and RD27 Series Coverage — Confirmed fit across RD16-90, RD16-100, RD27-100, and RD27-120 models, including Hydrostatic Vibratory Roller, Tandem Roller, RD27 Pro, and Tier 4 Final Basic and Pro configurations.
- Leak-Free Hydraulic Integrity — The ORFS face-seal interface eliminates the leak path common to tapered-thread fittings under dynamic pressure, maintaining consistent flow to drum drive motors and vibratory systems.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, this fitting carries the correct part number 5000164189 and is built to the tolerances required for high-cycle hydraulic service in compaction equipment.
A straight hydraulic fitting of this type serves as the transition point between two different hydraulic port standards within the machine's plumbing circuit. The #6 ORFS end connects via a flat face seal and O-ring to a hydraulic hose or component port, while the #5 ORB end threads into a boss port using an O-ring seated against a machined surface — both methods are designed to hold a leak-free seal under the sustained pressures generated by a hydrostatic roller's drive and vibratory systems. When a fitting of this type fails or is replaced with an incorrect size, hydraulic fluid can leak under pressure, causing loss of drive power, reduced vibratory output, and potential contamination of surrounding components. Using the correct OEM fitting ensures the integrity of the entire hydraulic circuit is maintained.
Part Details
| Part Number | 5000164189 |
|---|---|
| Old Part Number | 0164189 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | ST #6 ORFS #5 ORB Fitting |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD16-90 Vibratory Roller | RD16-90 | 5000620060, 5000620127, 5000620799 |
| RD 16-100 | RD16-100 | 5000620402, 5000620798 |
| Hydrostatic Vibratory Roller | RD27-100 | 5200005878, 5200014868, 5200023554, 5200023556, 5200005876, 5200021387 |
| Hydrostatic Vibratory Roller | RD27-120 | 5200005879, 5200014869, 5200014922, 5200014923, 5200023555, 5200023557, 5200024441, 5200005877, 5200021389 |
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.
