The Wacker Neuson WM130 4HP PD Engine is a genuine OEM power unit designed for the PDT2, PDT3, PDI2, and PDI3 series diaphragm trash pumps. As a direct-from-manufacturer component, this engine is built and validated to the same specifications as the original unit installed at the factory, ensuring a straight swap with no guesswork on fitment. Verified compatible with both the 50mm/2in and 75mm/3in diaphragm pump configurations across the PDT and PDI lines, part number is the correct replacement when your pump's powerplant needs to be renewed. Keep your pump back in service with the confidence that comes from sourcing the exact Wacker Neuson engine your machine was engineered around.
Key Features
- Genuine OEM Engine Assembly — Sourced directly from Wacker Neuson, this WM130 4HP PD Engine meets the original output, displacement, and mounting specifications of the unit it replaces — no substitutions or compromises.
- Drop-In Fitment for PDT and PDI Pump Families — Engineered to bolt directly onto PDT2, PDT3, PDI2, and PDI3 diaphragm trash pump frames, with matching mounting points, shaft orientation, and drive interface.
- Covers Both 50mm and 75mm Pump Configurations — A single part number spans the 2-inch and 3-inch diaphragm pump variants, simplifying procurement across your fleet.
- Restores Full Pumping Capacity — A worn or seized engine starves the diaphragm mechanism of the power it needs to maintain consistent flow rate and suction lift; a fresh WM130 unit brings both back to rated performance.
- Fuel System Integrity Maintained — As an OEM engine assembly, the fuel delivery and ignition components are configured to the correct specification, which is critical on pump engines that often run unattended for extended periods.
The WM130 4HP PD Engine is the dedicated gasoline power source for Wacker Neuson's diaphragm-style trash pumps. Unlike centrifugal pumps, diaphragm pumps rely on a mechanically driven reciprocating action to move water and solids, which places consistent torque demands on the engine across the full duty cycle. When the engine loses power output — through wear, internal damage, or failure to start — the diaphragm mechanism cannot generate adequate suction or discharge pressure, effectively taking the pump out of service. Replacing the engine assembly with the correct OEM unit, part number 5000161321, restores the power delivery the pump was designed around and gets the machine back to handling slurry, mud-laden water, and solids-laden jobsite drainage.
Part Details
| Part Number | 5000161321 |
|---|---|
| Old Part Number | 0161321 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | WM130 4HP PD Engine |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 50mm/2in Diaphragm Trash Pump | PDT2 | 5000009494 |
| 75mm/3in Diaphragm Trash Pumps | PDT3 | 5000009495, 5000620774 |
| 50mm/2in Diaphragm Trash Pump | PDI2 | 5000009489 |
| 75mm/3in Diaphragm Trash Pump | PDI3 | 5000009491, 5000009492 |
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