The Wacker Neuson Upper Mass is a genuine OEM component designed for the DPU 6055 and DPU 6555 series reversible vibratory plate compactors. As a direct factory replacement, this part meets the original engineering specifications that the DPU platform was built around, ensuring the exciter and baseplate system operate in proper dynamic balance. Compatible across multiple DPU 6055 and DPU 6555 variants — including He, Heap, H, WC, Hec, and US-spec configurations — this is the correct replacement for machines running in demanding soil and aggregate compaction applications.
Key Features
- Genuine OEM Mass Geometry: — Manufactured to the original weight and dimensional tolerances that govern vibration amplitude and compaction force output on DPU 6055 and DPU 6555 plates.
- Drop-In Replacement: — Engineered to mount directly to the exciter housing using the original bolt pattern, requiring no rework of adjacent components during installation.
- Broad DPU Series Coverage: — Fits DPU 6055 (standard, H, He, Heap, WC) and DPU 6555 (H, He, Heap, Hec, and US-spec) reversible vibratory plate compactors.
- Restores Compaction Performance: — A worn or damaged upper mass disrupts the exciter's rotational balance, reducing compaction depth and increasing machine vibration at the handles; replacing it returns the plate to rated output.
- Heavy-Duty Diesel Platform Rated: — Built for the operating loads of the DPU diesel reversible plate family, which targets high-density soil and aggregate compaction in trenches, embankments, and sub-base preparation.
The upper mass is one of two eccentric weights housed inside the exciter unit of a reversible vibratory plate compactor. By rotating in a controlled relationship with the lower mass, it generates the centrifugal force that drives the baseplate into the ground and — by shifting phase — allows the machine to travel forward or reverse. When the upper mass is cracked, worn out of tolerance, or otherwise damaged, the exciter loses its designed force output and directional control degrades, reducing compaction effectiveness and placing additional stress on bearings and housing components. Replacing it with a correctly specified part restores the full compaction performance and smooth directional response the DPU platform is engineered to deliver.
Part Details
| Part Number | 5000220278 |
|---|---|
| Old Part Number | 0220278 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Upper Mass |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| V.Plate DPU 6055Heap | DPU 6055 | 5000610049, 5000610050 |
| DPU6055-VIBROPLATE | DPU 6055He | 5000610053 |
| DPU6055-VIBROPLATE | DPU 6055 WC | 5000610175 |
| Vibratory Plate DPU 6555Heap | DPU 6555Heap | 5000610356 |
| DPU6555He-VIBROPLATE | DPU 6555He US | 5000610357 |
| Vibratory Plate DPU 6555He | DPU 6555He | 5000610354 |
| Vibratory Plate DPU 6555H | DPU 6555H | 5000610355 |
| Vibratory Plate | DPU 6555Hec | 5100004060 |
| DPU6555Hec Reversible Vibratory Plate | DPU 6555Hec US | 5100004399 |
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.
