Wacker Neuson 5000156999 Hydraulic Tee Fitting #8

The Wacker Neuson is a genuine OEM Hydraulic Tee Fitting #8 designed for the RD12A-90, RD12-90, and RD11 series walk-behind tandem rollers. As a direct factory replacement, this fitting matches the original hydraulic circuit routing and port sizing built into these double-drum vibratory rollers. Confirmed fitment spans both standard solid ROPS and foldable ROPS configurations of the RD12 family, as well as the hydrostatic double-drum RD11A and RD11V models. Sourcing the correct OEM fitting ensures the hydraulic system maintains its engineered flow path and connection integrity without improvised adaptations.

Key Features

• OEM-Spec Port Sizing: — Sized and threaded to the original #8 hydraulic specification, ensuring correct flow capacity and leak-free seating at the tee junction within the roller's hydraulic circuit.
• Drop-In Hydraulic Circuit Replacement: — Installs directly into the existing hydraulic line routing on RD12 and RD11 series rollers, matching the original three-port tee configuration without reworking hose connections.
• Broad RD-Series Fitment: — Compatible with RD12A-90 and RD12-90 tandem rollers in both solid and foldable ROPS configurations, plus the hydrostatic RD11A and RD11V double-drum models.
• Hydraulic Integrity Under Load: — A correctly seated tee fitting maintains consistent hydraulic pressure distribution across the roller's drive and vibration systems; a cracked or leaking fitting can cause erratic drum performance and pressure loss under compaction loads.
• Fuel and Fluid System Safety: — Hydraulic fittings that are improperly sized or worn can weep fluid under pressure, creating a fire and slip hazard on the machine and surrounding work surface — replacing with the correct OEM part eliminates this risk.

A hydraulic tee fitting splits or combines hydraulic fluid flow between three lines within the machine's closed-loop hydraulic system. In a tandem roller like the RD12 and RD11 series, the hydraulic circuit powers both the drum drive and the vibration system, making every connection point in that circuit critical to consistent machine output. When a tee fitting cracks, strips, or develops a slow weep, pressure drops across the circuit — resulting in reduced drum drive response, inconsistent vibratory force, and potential contamination of the hydraulic fluid. Replacing a damaged fitting promptly with the correct OEM part restores full hydraulic integrity and keeps the compaction system performing as engineered.

Part Details

Compatibility & Fitment

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.