Wacker Neuson 5100005138 Control Piston

The Wacker Neuson Control Piston is a genuine OEM component designed for the DPU4045, DPU4545, DPU5545, and DPU6555 series reversible vibratory plate compactors. As a direct OEM replacement sourced through authorized Wacker Neuson supply channels, part number is manufactured to the same specification as the original — ensuring correct fit and function without the guesswork. This Control Piston is compatible across an extensive range of DPU variants, including Heh, Hech, He, Hec, Hes, Heap, Hechzf, and Yeh configurations, as well as select BPU4545A and BPU5545A models. Whether you're servicing a single unit or maintaining a fleet of heavy-duty reversible plates, this is the correct OEM part for the job.

Key Features

• Genuine OEM Hydraulic Precision — Manufactured to Wacker Neuson's original hydraulic tolerances, ensuring the control piston seats, seals, and actuates correctly within the exciter housing.
• Drop-In Replacement — Matches the original piston's bore diameter, porting, and travel spec so it installs directly into the exciter assembly with no machining or adaptation.
• Broad DPU and BPU Series Coverage — Confirmed fitment across DPU4045, DPU4545, DPU5545, and DPU6555 families, plus BPU5545A and BPU4045A variants, in US, EU, and APAC configurations.
• Directional Control Integrity — A correctly functioning control piston is what allows the operator to switch compaction direction; a worn or sticking piston causes sluggish or failed reversing response, reducing compaction efficiency on every pass.
• Hydraulic System Safety — Proper piston fit prevents internal hydraulic bypass and pressure loss within the exciter circuit, protecting downstream hydraulic components from premature wear or failure.

The control piston is a core hydraulic component inside the exciter assembly of a reversible vibratory plate compactor. It responds to operator input at the handle to shift the eccentric weight position, which is what reverses the direction of plate travel — a defining feature of the DPU and BPU reversible plate families. When the control piston wears, sticks, or fails to seal correctly, the machine loses the ability to change direction smoothly or at all, making it behave like a single-direction plate and severely limiting its usefulness in confined or trench compaction work. Replacing a degraded piston with a genuine OEM 5100005138 restores full directional authority and protects the broader hydraulic exciter system from the pressure irregularities that a failing piston introduces.

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.