The Wacker Neuson Cotter Pin is a genuine OEM component designed for the PT2A, PT3A, and PT4A series self-priming centrifugal trash pumps, including international (I) variants. As a direct Wacker Neuson OEM part, the is manufactured to the same specification as the original hardware installed at the factory, ensuring correct dimensions and material grade for the application. This cotter pin fits across multiple PT-series pump configurations, making it a versatile service item to keep on hand for pump maintenance. Verify your model number against the fitment list before ordering to confirm compatibility.
Key Features
- Genuine OEM Material Grade — Manufactured to the same hardness and diameter tolerances as the original, so it shears or retains at the correct load without premature failure or over-retention.
- Drop-In Hardware Replacement — Matches the original pin diameter and leg length exactly, so it seats through the clevis or shaft bore and spreads without rework.
- Broad PT-Series Coverage — A single part number covers PT2A, PT3A, PT4A, and their international (I) variants, streamlining your parts inventory across multiple pump sizes.
- Positive Retention Under Vibration — Trash pumps run in demanding, high-vibration environments; a correctly specified cotter pin maintains positive locking of fasteners and linkages throughout the service interval.
- Critical Fastener Integrity — A missing or failed cotter pin can allow fasteners to back out or shaft-mounted components to shift; replacing worn hardware at each service interval is a simple step that protects larger, more expensive pump components.
A cotter pin is a split fastener inserted through a drilled hole in a shaft, bolt, or clevis pin and then bent open to lock the assembly in place. On centrifugal trash pumps like the PT series, cotter pins secure critical linkages and rotating or sliding components against loosening caused by continuous vibration during operation. When a cotter pin is missing, bent out of shape, or corroded through, the fastener or component it retains can shift or disengage, leading to mechanical wear, noise, or loss of function in the affected assembly. Replacing this small but essential piece of hardware at each scheduled service interval is a straightforward way to maintain the mechanical integrity of the pump.
Part Details
| Part Number | 5100050899 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Cotter Pin |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PT2A | PT2A | 5100042215 |
| PT3A | PT3A | 5100042216 |
| PT4A | PT4A | 5100042217, 5100042604 |
| PT2A(I) | PT2A(I) | 5100042613 |
| PT3A(I) | PT3A(I) | 5100042614 |
| PT4A(I) | PT4A(I) | 5100042615 |
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.
