The Wacker Neuson Piston is a genuine OEM Piston designed for the DPU80r and DPU90r series vibratory compaction plates, including the DPU80rLec670, DPU80rLec770, DPU80rLem670, DPU80rLem770, DPU90rLec770 US, DPU90rLem770 US, and the DPU 80/110 KMAT platform. Sourced directly from Wacker Neuson, this is the same part specified for original equipment assembly — no substitutions, no guesswork. Keeping the correct OEM piston in your compactor ensures the engine maintains proper compression and delivers the full compaction force these machines are built to produce. If you're servicing a DPU80r or DPU90r series plate, part is the verified factory replacement.
Key Features
- OEM Compression Integrity — Manufactured to the exact bore dimensions and ring-land geometry specified by Wacker Neuson, ensuring correct compression ratio is maintained during rebuild.
- Direct Engine Rebuild Fit — Drops into the cylinder bore of compatible DPU80r and DPU90r series engines as a direct replacement, matching the original pin bore, skirt profile, and crown geometry.
- Broad DPU Series Coverage — Fits seven confirmed models across the DPU80r and DPU90r platform, including Lec and Lem variants, as well as the DPU 80/110 KMAT configuration.
- Full Compaction Output Restored — A worn or seized piston causes loss of compression, weak exciter performance, and hard starting; replacing it with 5100005511 restores full engine output and plate force.
- Genuine Wacker Neuson Part — Supplied as an authentic OEM component under part number 5100005511, backed by Wacker Neuson's manufacturing standards for material grade and dimensional accuracy.
The piston is the reciprocating heart of a four-stroke engine — it travels up and down inside the cylinder bore to compress the air-fuel mixture and transfer combustion force to the crankshaft via the connecting rod. In a vibratory plate compactor like the DPU80r series, the engine piston must maintain a tight, consistent seal against the cylinder walls to generate the compression needed for reliable starting and full power delivery to the exciter unit. When a piston wears, scores, or cracks, compression drops, the engine loses power or fails to start, and blow-by can contaminate the oil — making timely replacement critical to keeping the compactor working at full capacity.
Part Details
| Part Number | 5100005511 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| DPU80rLec670 | DPU80rLec670 | 5100027033 |
| DPU80rLec770 | DPU80rLec770 | 5100027034 |
| DPU80rLem670 | DPU80rLem670 | 5100024697 |
| DPU80rLem770 | DPU80rLem770 | 5100024698 |
| DPU90rLec770 US | DPU90rLec770 US | 5100028359 |
| DPU90rLem770 | DPU90rLem770 US | 5100028358 |
| Vibration Plate DPU 80-110(r) KMAT | DPU 80/110 KMAT | 5100016604 |
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.
