The Wacker Neuson Piston is a genuine OEM component designed for the RD7 series tandem rollers and the DPU 4045H, DPU 4545H, DPU 5045H, and DPU 5545H series diesel reversible vibratory plate compactors. Sourced directly from Wacker Neuson, this piston matches original tolerances and material specifications to ensure correct operation within the engine assembly. It is a direct-fit replacement for all variants and regional configurations listed under these model families, including European and North American specifications.
Key Features
- OEM-Grade Dimensional Accuracy — Manufactured to Wacker Neuson's original bore diameter and ring land tolerances, ensuring consistent compression and proper sealing within the cylinder bore.
- Drop-In Engine Compatibility — Engineered to install directly into the existing cylinder assembly without machining or fitment adjustments, matching the original pin bore and crown profile.
- Broad Model Coverage — Fits multiple variants across the RD7 tandem roller family and the DPU 4045H, DPU 4545H, DPU 5045H, and DPU 5545H diesel reversible plate compactor series, including ap, ec, eh, and US-spec configurations.
- Sustained Compression Output — A correctly fitted piston maintains the engine's designed compression ratio, directly supporting the compaction force and drum or plate excitation performance these machines depend on.
- Genuine Wacker Neuson Part — Supplied as an authentic OEM replacement under part number 5000226585, verified against Wacker Neuson's parts catalog for full traceability.
The piston is a core reciprocating component inside the engine cylinder, responsible for compressing the air-fuel mixture and transferring combustion energy to the crankshaft via the connecting rod. On diesel-powered equipment like the DPU 4045H, DPU 5545H, and RD7 roller series, the piston must withstand high compression pressures and elevated operating temperatures cycle after cycle. When a piston wears, scores, or cracks, compression drops, fuel efficiency decreases, and the engine may smoke, lose power, or fail to start — all of which directly reduce the machine's compaction output. Replacing a worn piston with a genuine OEM part restores engine integrity and puts the machine back to its designed operating condition.
Part Details
| Part Number | 5000226585 |
|---|---|
| Old Part Number | 0226585 |
| 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.
