The Wacker Neuson Gearbox is a genuine OEM component designed for the PDT2, PDT3, PDI2, and PDI3 series diaphragm trash pumps. Sourced directly from Wacker Neuson, this gearbox delivers the exact tolerances and material specifications required for proper pump operation across both 50mm/2-inch and 75mm/3-inch configurations. It is a direct replacement for a wide range of PDT and PDI series models, including the PDT2A, PDT2B, PDT3A, PDI2A, PDI3A, PDT2, PDT3, PDI2, and PDI3. When the gearbox wears or fails, the diaphragm drive mechanism loses the precise motion it depends on — fitting the correct OEM part restores full pumping performance and protects the surrounding drivetrain components.
Key Features
- Genuine OEM Gear Tolerancing — Manufactured to Wacker Neuson's exact specifications, ensuring the gear mesh and output motion match the diaphragm drive's required stroke characteristics.
- Drop-In Replacement for PDT and PDI Series — Mounts directly into the pump housing using the original bolt pattern and shaft interface, with no machining or adaptation needed.
- Broad PDT and PDI Fitment Coverage — A single part number covers PDT2, PDT2A, PDT2B, PDT3, PDT3A, PDI2, PDI2A, PDI3, and PDI3A models in both 50mm/2-inch and 75mm/3-inch discharge sizes.
- Restores Full Diaphragm Stroke — A correctly functioning gearbox delivers consistent, repeatable diaphragm motion, maintaining rated flow capacity and preventing incomplete priming or pump cavitation.
- Protects Surrounding Drivetrain Components — Running a worn or damaged gearbox accelerates wear on the diaphragm, connecting rod, and crankcase; replacing it promptly with the OEM part prevents collateral damage.
The gearbox in a diaphragm trash pump is responsible for converting the engine's rotational output into the reciprocating motion that drives the diaphragm back and forth. This back-and-forth action creates the pressure differential that draws fluid in through the inlet valve and pushes it out through the discharge — it is the mechanical heart of the pumping cycle. When the gearbox wears, develops play, or fails outright, the diaphragm stroke becomes inconsistent or stops entirely, resulting in lost prime, reduced flow, or complete pump shutdown. Replacing it with the correct OEM unit restores the precise gear geometry the pump was engineered around.
Part Details
| Part Number | 5000089212 |
|---|---|
| Old Part Number | 0089212 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Gearbox |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 50mm/2in Diaphragm Trash Pump | PDT2A | 5000007610, 5000007611 |
| 75mm/3in Diaphragm Trash Pump | PDT3A | 5000007614, 5000007615, 5000007616 |
| 50mm/2in Inline Diaphragm Tras h Pump | PDI2A | 5000007624, 5000007625 |
| 75mm/3in Inline Diaphragm Tras h Pump | PDI3A | 5000007628, 5000007629, 5000009407 |
| 50mm/2in Diaphragm Trash Pump | PDT2 | 5000009494, 5000007633 |
| 75mm/3in Diaphragm Trash Pumps | PDT3 | 5000009495, 5000007619 |
| 50mm/2in Diaphragm Trash Pump | PDI2 | 5000009489 |
| 50mm/2in Diaphragm Trash Pump | PDT2B | 5000007612, 5000007613 |
| 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.
