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 part specifications as the unit installed at the factory, making it a straight swap for a worn or damaged original. It is confirmed compatible across multiple pump diaphragm and pump variants in the PDT and PDI families, so verify your model number before ordering to ensure an exact match.
Key Features
- Genuine OEM Gear Mesh Integrity — Manufactured to Wacker Neuson's original gear geometry and material specifications, ensuring correct torque transfer without backlash or premature wear.
- Direct-Mount Replacement — Matches the original bolt pattern, shaft dimensions, and housing profile of the 5100075521 application, allowing a clean installation without machining or adaptation.
- Broad PDT and PDI Series Coverage — A single part number covers the PDT3A, PDI3A, PDI3A(I) Pump Diaphragm, PDT2A, and PDI2A(I) Pump models, consolidating your parts order across the range.
- Sustained Drive Efficiency — A correctly functioning gearbox maintains consistent power delivery from the motor to the pump mechanism; a worn unit causes vibration, output loss, and accelerated damage to surrounding drivetrain components.
- OEM Part Number Assurance — Carrying Wacker Neuson part number 5100075521, this gearbox eliminates guesswork and confirms you are installing the correct assembly for your specific pump variant.
The gearbox transmits rotational power from the drive motor to the pump's operating mechanism, converting motor output into the mechanical motion needed to move fluid. It is a critical link in the drivetrain — if the gears wear, chip, or seize, the pump loses drive entirely or operates with reduced efficiency, leading to poor flow rates and added stress on the motor. Replacing a failing gearbox promptly with the correct OEM unit restores full pump performance and protects the surrounding components from secondary damage.
Part Details
| Part Number | 5100075521 |
|---|---|
| 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.
