The Wacker Neuson Woodruff Key is a genuine OEM component designed for the PDT2A, PDT3, PDT3A, PDI2A(I), PDI3A, and PDI3A(I) series diaphragm pumps. As a certified OEM part, the is manufactured to the exact tolerances required for correct shaft-to-hub engagement in Wacker Neuson diaphragm pump applications. This key is a direct replacement that installs into the original keyway without modification, restoring proper torque transfer between the shaft and drive components. If your pump has suffered a sheared or worn key, replacing it with the correct OEM part is the fastest way to return the machine to full working condition.
Key Features
- OEM-Spec Dimensional Accuracy — Manufactured to exact width, height, and radius tolerances so the key seats fully in the keyway and transmits torque without slop or stress concentration.
- Drop-In Keyway Fit — Machined to match the original keyway profile on Wacker Neuson diaphragm pump shafts, allowing straightforward installation without filing or shimming.
- Broad PDT/PDI Series Coverage — Fits PDT2A, PDT3, PDT3A, PDI2A(I), PDI3A, and PDI3A(I) diaphragm pump models across multiple production series.
- Restores Full Torque Transfer — A correctly seated Woodruff Key locks the drive hub to the shaft, ensuring consistent pump stroke and preventing the slippage that causes erratic output or complete pump failure.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, this part carries the same part number — 5000180271 — used by authorized service centers, ensuring you receive the correct component every time.
A Woodruff Key is a small, semi-circular metal key that fits into matching slots — called keyways — cut into both a shaft and a mating hub or gear. Its purpose is to lock those two components together rotationally so that drive power is transferred from one to the other without slipping. In a diaphragm pump, the Woodruff Key secures the drive hub to the crankshaft, ensuring the eccentric motion that drives the diaphragm stroke is transmitted cleanly and consistently. When the key shears or wears, the hub can spin independently of the shaft, causing an immediate loss of pumping action; in some cases a damaged key can also damage the keyway itself, making prompt replacement with a correctly sized OEM part critical to avoiding more extensive repairs.
Part Details
| Part Number | 5000180271 |
|---|---|
| Old Part Number | 0180271 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Woodruff Key |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PDT2A | PDT2A | 5000620769, 5100075510 |
| PDT2 Pump, Diaphragm | PDT2 | 5000620770 |
| PDI2A(I) | PDI2A(I) | 5000620772, 5100075511 |
| PDT3A | PDT3A | 5000620773, 5100075507 |
| PDT3 | PDT3 | 5000620774 |
| PDI3A | PDI3A | 5000620775, 5100075508 |
| PDI3A(I) | PDI3A(I) | 5000620776, 5100075509 |
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.
