The Wacker Neuson Upper Mass is a genuine OEM component designed for the DPU5545H and DPU4545H series reversible plate compactors. Sourced directly from Wacker Neuson, this part carries the same specifications as the original, ensuring a direct, bolt-in replacement with no guesswork on compatibility. Confirmed fitment spans a wide range of DPU5545 and DPU4545 variants, including H, He, Heh, Hec, Hech, and their US and AP derivatives.
Key Features
- Genuine OEM Mass Integrity — Manufactured to Wacker Neuson's original weight and dimensional specifications, preserving the vibration balance the machine was engineered around.
- Direct Bolt-In Replacement — Matches the original mounting points and interface geometry of the upper mass assembly, so installation follows the standard service procedure without adaptation.
- Broad DPU Series Compatibility — Fits DPU5545H, DPU5545He, DPU5545Heh, DPU5545Hec, DPU5545Hech, DPU4545H, DPU4545He, DPU4545Heh, DPU4545Hec, DPU4545Hech, and related US, AP, and ZF variants.
- Compaction Output Restored — A correctly fitted upper mass maintains the tuned exciter frequency transfer between the lower and upper assemblies, delivering consistent compaction force at the plate.
- Verified Part Number — Part number 5100004978 cross-references directly against Wacker Neuson's OEM parts documentation for the supported model range.
The upper mass on a reversible plate compactor is the weighted top section of the machine's vibration isolation system. It works in conjunction with the lower exciter assembly and the rubber isolation mounts between them to control how vibration energy is directed downward into the plate and absorbed away from the operator handles. When the upper mass is cracked, damaged, or replaced with an incorrectly weighted component, the isolation system falls out of balance — compaction performance drops, vibration bleeds into the frame, and wear on surrounding mounts and bearings accelerates. Replacing a worn or damaged upper mass with the correct Wacker Neuson 5100004978 restores the designed vibration characteristics and protects the integrity of the wider exciter system.
Part Details
| Part Number | 5100004978 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Upper Mass |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 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 |
| DPU4545H | DPU 4545H | 5100009661 |
| DPU5545HECH US | DPU5545Hech US | 5100016948 |
| DPU4545HECH US | DPU4545Hech US | 5100016952 |
| DPU4545Hechzf | DPU4545Hechzf | 5100022112 |
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.
