The Wacker Neuson Mechanical Seal is a genuine OEM component designed for PT3A, PT4A, PT3A(I), and PT4A(I) series self-priming centrifugal trash pumps. Sourced directly from Wacker Neuson, this seal meets the exact material and dimensional standards of the original part — ensuring a correct, leak-free fit at the pump shaft interface. Compatible across both standard and indirect-drive configurations within the PT3A and PT4A families, the is the correct replacement when your pump develops shaft seal leakage or is due for a scheduled service rebuild.
Key Features
- Genuine OEM Sealing Performance — Manufactured to Wacker Neuson's original material and compression specifications, so the seal face maintains proper contact pressure at the pump shaft under continuous operating loads.
- Direct Shaft-Interface Replacement — Installs directly onto the pump shaft in the same position as the original, with no modification to the housing or impeller assembly required.
- Broad PT-Series Fitment — Confirmed fit for PT3A, PT4A, PT3A(I), and PT4A(I) trash pumps, covering both 3-inch and 4-inch discharge configurations in standard and indirect-drive variants.
- Prevents Shaft and Housing Damage — A correctly seated mechanical seal keeps water and abrasive debris out of the bearing cavity; a worn or failed seal allows fluid ingress that rapidly damages the shaft, bearings, and pump housing.
- Fluid Containment and Operator Safety — Maintaining an intact mechanical seal prevents uncontrolled fluid leakage at the pump shaft, which is especially critical when handling dirty or chemically contaminated water on site.
A mechanical seal sits between the rotating pump shaft and the stationary pump housing, creating a pressurized face-to-face barrier that prevents water from escaping along the shaft. In a trash pump like the PT3A and PT4A series, this seal is under constant stress from shaft rotation, pump pressure, and the abrasive particles passing through the volute. When the seal faces wear or the elastomeric components harden and crack, the pump will begin leaking at the shaft — reducing output pressure, allowing fluid to contaminate the bearing assembly, and eventually causing enough damage to sideline the machine entirely. Replacing the 5100044463 Mechanical Seal at the first sign of shaft leakage, or as part of a routine pump service, protects the entire pump assembly and restores full pumping capacity.
Part Details
| Part Number | 5100044463 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Mechanical Seal |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PT3A | PT3A | 5100042216 |
| PT4A | PT4A | 5100042217, 5100042604 |
| 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.
