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 specifications required for your pump's fluid end, ensuring a proper, leak-free interface between the rotating shaft and the pump housing. If your pump is showing signs of shaft leakage or moisture around the impeller housing, replacing the mechanical seal with part number is the correct first step. Fits both standard and indirect (I) configurations across the PT3A and PT4A families.
Key Features
- Genuine OEM Sealing Integrity — Manufactured to Wacker Neuson's exact material and dimensional spec, ensuring the seal faces mate correctly and hold under pump operating pressures.
- Direct Shaft-End Replacement — Installs at the pump shaft/impeller interface exactly as the original, with no modification to the housing or shaft required.
- Broad PT-Series Compatibility — Confirmed fitment across PT3A, PT4A, PT3A(I), and PT4A(I) trash pump models, covering both 3-inch and 4-inch discharge configurations.
- Stops Shaft Leakage at the Source — A worn or degraded mechanical seal allows water and debris to migrate along the shaft, leading to bearing contamination and accelerated pump failure; this OEM replacement restores the dynamic seal barrier.
- Fluid-System Safety — A correctly seated mechanical seal prevents uncontrolled fluid discharge around the shaft, which is critical when pumping wastewater, slurry, or chemically active site water.
A mechanical seal is the dynamic sealing element that sits between the pump's rotating impeller shaft and the stationary housing. It uses two precision-lapped seal faces — one rotating with the shaft, one fixed to the housing — pressed together to prevent pumped fluid from escaping along the shaft. When the seal wears, warps, or its faces become scored, fluid begins to leak past the shaft, which can saturate the bearing cavity and cause rapid bearing and shaft damage. Replacing a failing mechanical seal promptly protects the broader pump assembly and restores full pumping efficiency.
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.
Wacker Neuson
O-Ring Kit | Wacker PT3, PT3A - 5100 Series | 5100044498
Wacker Neuson
New Style Mechanical Seal Kit | Wacker PT3, PT3A - Threaded Impeller | 0117819, 5000117819
