The Wacker Neuson Upper Mass is a genuine OEM component designed for BPU 5545A and BPU 4045A US reversible vibratory plate compactors. Sourced directly from Wacker Neuson, this part carries the same specifications as the original, ensuring a correct drop-in fit with no guesswork. Compatible models include the BPU 5545A, BPU 5545A US, and BPU 4045A US — a heavy-duty lineup built for demanding soil and aggregate compaction applications. Keeping the upper mass in proper working condition is essential to maintaining the compaction force and vibration output these machines are engineered to deliver.
Key Features
- Genuine OEM Mass Specification — Manufactured to the exact weight and dimensional tolerances specified by Wacker Neuson, preserving the designed vibration frequency and compaction force output of your BPU.
- Direct-Fit Replacement — Engineered to mount and align to the exciter housing exactly as the original, matching all bolt patterns and mating surfaces for a straightforward swap.
- Broad BPU Series Compatibility — Fits the BPU 5545A, BPU 5545A US, and BPU 4045A US reversible plate compactors, covering a range of Wacker Neuson's gasoline-powered reversible compaction models.
- Restores Full Compaction Performance — A worn or damaged upper mass disrupts the balanced vibration system, causing uneven compaction force and reduced soil density results; replacing it restores consistent, full-depth compaction.
- Backed by Wacker Neuson OEM Quality — As a genuine OEM part, the 5100005499 meets the material grade and structural integrity standards set for high-cycle vibratory compaction duty.
The upper mass is a core component of the vibratory exciter system in a reversible plate compactor. Working in coordination with the lower mass and eccentric weights inside the exciter housing, it generates the oscillating force that drives compaction energy into the ground. The balance and mass of this component directly determine the amplitude and frequency of the plate's vibration — if the upper mass is cracked, worn, or missing, the machine loses compaction efficiency and the exciter assembly is exposed to uneven stress that can accelerate wear across surrounding components.
Part Details
| Part Number | 5100005499 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Upper Mass |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BPU5545A | BPU 5545A | 5100009657 |
| BPU 5545A US | BPU 5545A US | 5100009658 |
| BPU 4045A US | BPU 4045A US | 5100009663 |
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.
