Wacker Neuson 5100011786 Variable Displacement Pump Drive

The Wacker Neuson Variable Displacement Pump Drive is a genuine OEM component designed for the RD40-130 and RD45-140 series tandem rollers, including standard, C, O, US, DPF, and.3 variants. As a factory-sourced part, the is built to the exact specifications Wacker Neuson engineers to ensure correct hydraulic output and drive response on these machines. This pump is a direct-fit replacement that covers an extensive range of RD40-130 and RD45-140 configurations, making it the reliable choice for fleet operators and service technicians working across multiple machine variants. Confirm your model number against the fitment list before ordering to ensure compatibility.

Key Features

• Genuine OEM Hydraulic Precision — Factory-sourced from Wacker Neuson with the exact displacement ratings and port dimensions required for correct drive circuit performance on RD-series rollers.
• Direct-Fit Replacement — Engineered to connect directly to the existing hydraulic circuit and mounting points on compatible RD40-130 and RD45-140 machines, with no circuit modifications needed.
• Broad RD-Series Coverage — A single part number covers standard, C (combination), O (open), US, DPF, and .3 generation variants across both the RD40-130 and RD45-140 model families.
• Consistent Drive Power Output — A properly functioning variable displacement pump maintains responsive propulsion control across varying load conditions, keeping compaction output stable and efficient.
• Hydraulic System Integrity — Using a correctly rated OEM pump prevents pressure imbalances in the drive circuit that can lead to accelerated wear on downstream hydraulic components such as motors and control valves.

The variable displacement pump drive is the heart of the hydraulic propulsion system on these tandem rollers. It converts engine power into adjustable hydraulic flow, allowing the machine to vary its drive speed and tractive force in response to load demands — critical for controlled compaction on grade changes and tight passes. When this pump wears or fails, the machine may lose propulsion response, exhibit sluggish or uneven drive behavior, or put excessive strain on the rest of the hydraulic circuit.

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.