Wacker Neuson 5100078851 Def Dosing Injector

The Wacker Neuson Def Dosing Injector is a genuine OEM component designed for RC110 ROPS, RC110 CAB, RC110p ROPS, and RC110p CAB roller models. As a direct OEM replacement, this injector is manufactured to the same specifications as the original unit, ensuring proper integration with the machine's DEF delivery system. Verify your model number against the fitment list before ordering to confirm compatibility with your specific RC110 or RC110p configuration.

Key Features

• OEM-Calibrated Dosing Accuracy — Manufactured to deliver the precise DEF injection volume required for correct emissions system operation, preventing sensor faults and SCR catalyst issues.
• Direct-Fit Replacement — Engineered to connect directly to the existing DEF lines and electrical harness on compatible RC110 and RC110p rollers without modification to fittings or connectors.
• Broad RC110 Series Coverage — Fits four distinct configurations: RC110 ROPS, RC110 CAB, RC110p ROPS, and RC110p CAB, covering both cab and open-operator models in the RC110 family.
• Emissions System Integrity — A correctly functioning DEF dosing injector keeps the aftertreatment system operating within regulatory parameters, preventing derate conditions that restrict engine power.
• Emissions Compliance Critical — The DEF injector is a core component of the diesel exhaust fluid aftertreatment system; using a genuine OEM unit helps maintain compliance with applicable emissions standards and avoids fault codes that can trigger machine shutdown.

The DEF dosing injector meters and injects diesel exhaust fluid into the exhaust stream upstream of the selective catalytic reduction (SCR) catalyst. This process converts harmful nitrogen oxides into nitrogen and water vapor, allowing the machine to meet emissions requirements. When the injector fails or becomes clogged, the aftertreatment system cannot function correctly, which typically triggers fault codes, engine derate, or in some cases a full machine shutdown until the issue is resolved.

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.