The Wacker Neuson Mechanical Seal O-Ring Kit is a genuine OEM seal service kit designed for PT3A and PT4A series self-priming centrifugal trash pumps. Sourced directly from Wacker Neuson, this kit delivers the exact materials, dimensions, and compression tolerances required to restore a proper fluid-tight seal in the pump housing. It covers the PT3A, PT4A, PT3A(I), and PT4A(I) model variants, making it the correct choice across both standard and indirect-drive configurations in that pump family. Keep this kit on hand as part of routine pump maintenance to avoid unplanned leaks and service interruptions on the job.
Key Features
- OEM-Grade Seal Materials — Genuine Wacker Neuson components manufactured to the precise elastomer grade and compression spec required for the mechanical seal cavity in PT-series trash pumps.
- Complete Drop-In Service Kit — Includes both the mechanical seal and O-ring, providing everything needed to fully address the primary seal points in a single service event without sourcing components separately.
- Broad PT3A / PT4A Coverage — Confirmed fitment across PT3A, PT4A, PT3A(I), and PT4A(I) pump models, covering both standard and indirect-drive configurations within the same kit.
- Leak-Free Pump Operation — A correctly seated mechanical seal prevents water and slurry from bypassing the seal face, maintaining full pump pressure and protecting the shaft and bearing assembly from contamination.
- Fuel and Fluid Safety Compliance — Replacing worn or degraded pump seals eliminates uncontrolled fluid egress, an important operational and site-safety consideration when pumping contaminated water or chemical-laden slurry.
The mechanical seal in a centrifugal trash pump creates a dynamic, rotating fluid barrier between the impeller shaft and the pump casing. It prevents water from escaping along the shaft while the pump is running under pressure. The O-ring works alongside the mechanical seal to close off static mating surfaces within the seal housing. When either component wears, hardens, or loses compression, the pump will begin to leak at the shaft — reducing discharge pressure, allowing abrasive material to reach the bearing, and accelerating internal damage. Replacing both together with the 5100044463 kit restores the full seal assembly to specification and extends the working life of the pump.
Part Details
| Part Number | 5100044463 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Mechanical Seal O-Ring Kit |
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.
