The Wacker Neuson Gearbox is a genuine OEM component designed for the PDT3A, PDI3A, PDI3A(I), PDT2A, and PDI2A(I) pump series. Sourced directly from Wacker Neuson, this gearbox carries the same exacting tolerances and material specifications as the original unit installed at the factory. Confirmed fitment spans both diaphragm and standard pump variants across the PDT and PDI series, making it a straightforward drop-in solution when the original unit reaches end of life. When an accurate, like-for-like replacement matters, the is the correct part to order.
Key Features
- OEM Gear Mesh Precision — Manufactured to Wacker Neuson's original gear geometry and hardness specifications, ensuring smooth power transfer and correct drive engagement throughout the pump's operating range.
- Direct Bolt-In Replacement — Matches the original mounting interface, shaft dimensions, and housing configuration of the factory gearbox for a straightforward installation with no adaptation needed.
- Broad PDT and PDI Series Coverage — Confirmed fit across PDT3A, PDI3A, PDI3A(I) Pump Diaphragm, PDT2A, and PDI2A(I) Pump models, covering a wide range of Wacker Neuson diaphragm and standard pump variants.
- Sustained Drive Output — A correctly functioning gearbox maintains consistent eccentric drive motion to the pump mechanism; a worn or failed unit causes loss of pumping action, irregular stroke, or complete pump failure.
- Genuine OEM Confidence — Part number 5100075520 is an authorized Wacker Neuson replacement, eliminating guesswork on specification compliance when returning a pump to service.
The gearbox in a diaphragm pump converts rotational power from the engine or motor into the reciprocating eccentric motion that drives the diaphragm back and forth. This mechanical action creates the suction and discharge strokes responsible for moving fluid through the pump. When the gearbox wears or fails — through gear tooth damage, bearing degradation, or housing cracking — the diaphragm loses its controlled drive stroke, resulting in reduced flow, erratic pumping, or a complete loss of output. Replacing the gearbox with a correct OEM unit restores full stroke consistency and brings the pump back to its rated performance.
Part Details
| Part Number | 5100075520 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Gearbox |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PDT3A | PDT3A | 5100075507 |
| PDI3A | PDI3A | 5100075508 |
| PDI3A(I) PUMP DIAPHRAGM | PDI3A(I) | 5100075509 |
| PDT2A | PDT2A | 5100075510 |
| PDI2A(I) PUMP | PDI2A(I) | 5100075511 |
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.
