The Wacker Neuson Engine Hatz 1D42S S is a genuine OEM power unit designed for the RD7H-S and RD 7S double drum roller series. Sourced directly through Wacker Neuson's authorized parts program, this engine assembly carries the same specifications as the unit installed at the factory. Fitment is confirmed for the RD7H-S and RD 7S models, giving you a straight, verified replacement with no guesswork on compatibility.
Key Features
- Genuine OEM Engine Assembly — Hatz 1D42S S displacement and output ratings match the original specification, ensuring the roller performs exactly as engineered from day one.
- Direct-Drop Replacement — Mounting points, fuel connections, and wiring interfaces align with the existing roller chassis, so the swap stays straightforward for your service crew.
- Confirmed Fitment for RD7H-S and RD 7S Rollers — Part number 5000181244 is validated against both the RD7H-S and RD 7S double drum roller platforms, covering the key machines in this compaction series.
- Full Power Output Restored — A worn or seized engine robs the roller of the centrifugal force needed for consistent compaction passes; replacing it with the correct Hatz 1D42S S unit brings drum speed and compaction output back to spec.
- Fuel System Integrity — As a complete engine assembly, the 1D42S S includes the integrated fuel delivery components sized and calibrated for this application, supporting clean combustion and stable operation under continuous compaction loads.
The Hatz 1D42S S is a single-cylinder, air-cooled diesel engine purpose-built for compact construction equipment. It drives the vibratory and propulsion systems of the double drum roller, converting fuel energy into the rotational force that powers drum vibration and forward travel. When this engine degrades — through worn rings, seized components, or end-of-service-life wear — the machine loses the consistent power delivery needed to achieve proper compaction depth, directly affecting site quality and pass efficiency. Replacing it with the correct OEM unit restores full operational capability to the roller.
Part Details
| Part Number | 5000181244 |
|---|---|
| Old Part Number | 0181244 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Engine Hatz 1D42S S |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD 7S | RD7H-S EU | 5000620795 |
| RD7H-S ROLLER,DOUBLE DRUM | RD7H-S | 5000009487 |
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.
Wacker Neuson
Wacker Neuson Engine-Hatz 1D42S,S Non-Epa | 5100037228
Wacker Neuson