The Wacker Neuson Piston is a genuine OEM component designed for the RD7 series tandem rollers and DPU 4045H, DPU 4545H, DPU 5045H, and DPU 5545H reversible vibratory plate compactors. Sourced directly from Wacker Neuson, this piston matches the original manufacturer's specifications for a direct, hassle-free installation. It covers an extensive range of RD7 and DPU variants — including electric-start, heating, and combination configurations — making it a versatile stock item for dealers and service teams. Confirm your machine's model number before ordering to ensure an accurate match.
Key Features
- Genuine OEM Dimensional Accuracy — Manufactured to the exact bore diameter, ring groove depth, and crown profile specified for the original engine, ensuring correct compression and seal integrity on every stroke.
- Drop-In Engine Fitment — Engineered to align with the original connecting rod, wrist pin, and cylinder bore without machining or shimming, keeping engine reassembly straightforward.
- Broad RD7 and DPU Series Coverage — Compatible with multiple RD7 tandem roller configurations and DPU 4045H, DPU 4545H, DPU 5045H, and DPU 5545H reversible vibratory plate compactors across a wide range of serial number bands.
- Sustained Compression Output — A correctly fitted piston maintains the combustion pressure the engine needs to deliver consistent centrifugal force output — critical for achieving target compaction density in soil and aggregate applications.
- Fuel System Safety Compliance — Proper piston-to-wall clearance prevents blow-by that can introduce combustion gases and unburned fuel into the crankcase, reducing the risk of oil contamination and crankcase pressure buildup.
The piston is the reciprocating component at the heart of a four-stroke engine's power cycle. It travels up and down inside the cylinder bore, compressing the air-fuel mixture on the upstroke and transferring the force of combustion through the connecting rod to the crankshaft on the power stroke. On RD7 tandem rollers and DPU-series reversible plate compactors, this rotational output ultimately drives the exciter assembly that generates the vibratory compaction force. When a piston wears excessively — through scoring, ring groove damage, or loss of roundness — compression drops, power output falls, fuel consumption rises, and the engine may produce excessive smoke or fail to start reliably. Replacing the piston with a genuine OEM part restores the engine to its specified compression ratio and returns the machine to full compaction performance.
Part Details
| Part Number | 5000226584 |
|---|---|
| Old Part Number | 0226584 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD 7S | RD7H-S EU | 5000620795 |
| RD7H-S ROLLER,DOUBLE DRUM | RD7H-S | 5000009487 |
| RD7 Tandem Roller | RD7He | 5100017193, 5100017194, 5200015241, 5200015244, 5100038031, 5100018451 |
| RD7 Tandem Roller | RD7H | 5100017195, 5100017338, 5200015242, 5200015245 |
| V.Plate DPU 5045Heap | DPU 5045H | 5000610046, 5000610052, 5000610047 |
| V.Plate DPU 4045Hap | DPU 4045H | 5000610044, 5000610051, 5000610064 |
| DPU5545Heh | DPU5545Heh | 5100009652 |
| DPU5545HEH US | DPU5545Heh US | 5100009653 |
| DPU5545Hehap | DPU5545Hehap | 5100009654 |
| DPU5545Hech | DPU5545Hech | 5100009655, 5100051523 |
| DPU4545Heh | DPU4545Heh | 5100009659 |
| DPU4545HEH US | DPU4545Heh US | 5100009660 |
| DPU4545Hech | DPU4545Hech | 5100015429, 5100051522 |
| DPU5545He | DPU5545He | 5100016947 |
| DPU5545Heap | DPU5545Heap | 5100016949 |
| DPU5545Hec | DPU5545Hec | 5100016950 |
| DPU4545He | DPU4545He | 5100016951 |
| DPU4545Hec | DPU4545Hec | 5100016953 |
| DPU5545H | DPU 5545H | 5100009656, 5000610352 |
| DPU4545H | DPU 4545H | 5100009661, 5000610348 |
| DPU5545HECH US | DPU5545Hech US | 5100016948 |
| DPU4545HECH US | DPU4545Hech US | 5100016952 |
| DPU4545Hechzf | DPU4545Hechzf | 5100022112 |
| DPU 5045He-VIBROPLATE | DPU 5045He US | 5000610367 |
| DPU5545He-VIBROPLATE | DPU 5545He US | 5000610402 |
| Vibratory Plate DPU 4545He US | DPU 4545He US | 5100000679 |
| DPU4545He-VIBROPLATE | DPU 4545He | 5000610347 |
| Vibratory Plate DPU 4545Hap | DPU 4545Hap | 5000610349 |
| Vibratory Plate DPU 5545He | DPU 5545He | 5000610351 |
| Vibratory Plate DPU 5545Heap | DPU 5545Heap | 5000610353 |
| Vibratory Plate | DPU 5545Hec | 5100005859 |
| RD7Heh | RD7Heh | 5100006334 |
| RD7Hehf | RD7Hehf | 5100006339 |
| RD7Hehfb | RD7Hehfb | 5100006344 |
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.
