The Wacker Neuson Piston Pin is a genuine OEM component designed for the PDT2, PDT3, PDI2, PDI3, and PG2 series diaphragm and dewatering pumps. Sourced directly through Wacker Neuson's authorized parts program, the meets the exact dimensional and material specifications required for proper pump operation. This pin fits across the full range of 50mm/2-inch and 75mm/3-inch diaphragm trash pump configurations as well as the PG2 dewatering pump lineup, making it a versatile service part for fleet operators and pump technicians alike.
Key Features
- Genuine OEM Dimensional Accuracy — Manufactured to the exact diameter and surface finish tolerances Wacker Neuson specifies for the piston-to-connecting-rod interface, ensuring correct load transfer without excessive play or binding.
- Drop-In Replacement — Engineered to the same pin bore dimensions as the original, so it seats correctly in the piston and connecting rod without additional machining or fitting.
- Broad Pump Family Coverage — A single part number covers PDT2, PDT3, PDI2, PDI3, and PG2 models, simplifying parts inventory for contractors and rental fleets running multiple pump sizes.
- Sustained Pumping Performance — A correctly sized piston pin maintains the precise stroke geometry the diaphragm depends on; a worn or oversized pin causes erratic stroke length, reduced flow output, and accelerated diaphragm wear.
- Genuine OEM Assurance — Carrying Wacker Neuson's genuine OEM designation means this part is traceable to the same production standards as the original build, not an approximation.
The piston pin is the hardened cylindrical shaft that connects the piston to the connecting rod inside the pump's drive mechanism, transferring rotational crankshaft motion into the reciprocating movement that flexes the diaphragm and creates pumping action. It must withstand continuous cyclic loading across thousands of strokes per minute, so material hardness and surface finish are critical to longevity. When the pin wears, it introduces slop into the drivetrain, which causes the diaphragm to flex unevenly, reducing flow rate, increasing vibration, and ultimately shortening the life of surrounding components including the diaphragm itself.
Part Details
| Part Number | 5000205520 |
|---|---|
| Old Part Number | 0205520 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston Pin |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 50mm/2in Diaphragm Trash Pump | PDT2 | 5000009494, 5000620770 |
| 75mm/3in Diaphragm Trash Pumps | PDT3 | 5000009495, 5000620774 |
| PG2 Dewatering Pump | PG2 | 5000009496, 5000009497 |
| 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.
