The Wacker Neuson Injection Pump is a genuine OEM Injection Pump designed for the DPU5545H, DPU4545H, and RD7H series reversible plate compactors and vibratory rollers. As a direct Wacker Neuson OEM component, the is built to the exact tolerances and flow specifications required by the original diesel fuel system — ensuring the engine starts reliably and delivers consistent power output in demanding compaction work. Fitment spans a broad range of DPU5545H and DPU4545H variants, including standard, eh, hech, heap, and US-market configurations, as well as the RD7H, RD7Heh, RD7Hf, RD7Hehf, RD7Hfb, and RD7Hehfb roller models. Verify your model number before ordering to confirm compatibility.
Key Features
- OEM-Calibrated Fuel Delivery — Manufactured to Wacker Neuson's original injection timing and flow specifications, maintaining the fuel-to-air ratio the engine was engineered to run on.
- Direct-Fit Replacement — Mounts directly to the existing fuel system connections on compatible DPU5545H, DPU4545H, and RD7H series machines without reworking lines or fittings.
- Broad Series Coverage — A single part number covers multiple DPU5545H and DPU4545H variants (including eh, hech, heap, hechzf, and US-spec models) plus the full RD7H roller family.
- Consistent Engine Performance — A correctly functioning injection pump keeps combustion cycles steady, supporting full compaction force and preventing the rough running, hard starts, and power loss caused by a worn or failing pump.
- Fuel System Safety Assurance — As a critical component in the high-pressure diesel fuel circuit, using a genuine OEM pump rated for the correct pressure range reduces the risk of fuel leaks and injection system damage.
The injection pump is the heart of the diesel fuel system on these compactors and rollers. It draws fuel from the tank and pressurizes it to the precise level needed for the injectors to atomize fuel into the combustion chamber at exactly the right moment — without that accuracy, the engine loses power, runs rough, or fails to start altogether. When an injection pump wears out or fails, fuel delivery becomes inconsistent, leading to hard starting, black smoke, loss of compaction force, and eventual engine damage if left unaddressed.
Part Details
| Part Number | 5100032124 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Injection Pump |
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 |
| RD7H | RD7H | 5100006333 |
| RD7Heh | RD7Heh | 5100006334 |
| RD7Hf | RD7Hf | 5100006338 |
| RD7Hehf | RD7Hehf | 5100006339 |
| RD7Hfb | RD7Hfb | 5100006343 |
| 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.
