Wacker Neuson 5100078831 Def Line

The Wacker Neuson Def Line is a genuine OEM component designed for RC110 ROPS, RC110 CAB, RC110p ROPS, and RC110p CAB compact track loaders. As a direct factory part, it meets the exact specifications required for proper DEF (Diesel Exhaust Fluid) delivery within the machine's emissions control system. If your RC110 or RC110p is experiencing DEF system faults, fluid delivery issues, or visible line damage, replacing this line with the correct OEM part restores proper system function and keeps your machine in compliance.

Key Features

• OEM-Spec DEF Compatibility — Manufactured from materials rated to handle Diesel Exhaust Fluid without degradation, cracking, or chemical breakdown over time.
• Direct-Fit Replacement — Engineered to match the original routing, connection points, and line diameter of the factory-installed component for a straightforward swap.
• Broad RC110 Series Coverage — Confirmed fitment across RC110 ROPS, RC110 CAB, RC110p ROPS, and RC110p CAB variants, covering both standard and pressurized cab configurations.
• Emissions System Integrity — A functioning DEF line ensures uninterrupted fluid flow to the selective catalytic reduction (SCR) system, preventing fault codes, derate conditions, and forced shutdowns.
• Emissions Compliance Assurance — The DEF delivery system is a regulated emissions component; using a genuine OEM line helps ensure your machine remains compliant with applicable emissions standards.

The DEF line carries Diesel Exhaust Fluid from the storage tank to the dosing injector in the machine's selective catalytic reduction (SCR) exhaust aftertreatment system. This fluid is injected into the exhaust stream to convert harmful nitrogen oxides into harmless nitrogen and water vapor, keeping the machine within emissions regulations. When the line cracks, leaks, or becomes blocked, DEF flow is interrupted — triggering warning codes, engine power derate, or a complete shutdown until the fault 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.