The Wacker Neuson 5100044509 is a genuine OEM O-Ring designed for the PT3A, PT3A(I), PT4A, and PT4A(I) series self-priming centrifugal trash pumps. Sourced directly from Wacker Neuson, this O-Ring matches the exact material grade, durometer, and dimensional profile specified for these pump models. Choosing the correct OEM seal ensures a proper mating surface and helps maintain the pump's rated performance across demanding jobsite conditions.
Key Features
- OEM-Grade Sealing Material — Manufactured to Wacker Neuson's exact compound and durometer specification, delivering the compression set resistance required for pump sealing applications.
- Drop-In Replacement — Matches the original cross-section and diameter so it seats correctly in the existing groove without reworking mating surfaces.
- Broad PT-Series Coverage — A single part number covering PT3A, PT3A(I), PT4A, and PT4A(I) trash pump configurations, simplifying parts sourcing across your fleet.
- Maintains Pump Integrity — A serviceable O-Ring keeps fluid passages properly sealed; a worn or damaged seal allows air ingestion or fluid bypass, causing loss of prime and reduced discharge pressure.
- Fluid-System Safety — A correctly installed, specification-correct O-Ring prevents uncontrolled leakage at pump joints, protecting both the operator and the surrounding work environment.
An O-Ring is a circular elastomeric seal that sits in a machined groove between two mating surfaces, creating a pressure-tight barrier against fluid or air leakage. In a self-priming trash pump like the PT3A and PT4A series, O-Rings are critical at housing joints, inspection covers, and volute interfaces — any loss of seal integrity at these points allows air into the suction path, preventing the pump from building the vacuum it needs to prime. A faulty or degraded O-Ring typically shows up as difficulty maintaining prime, visible seepage around pump joints, or a gradual drop in discharge flow. Replacing a worn O-Ring with the correct OEM part restores the sealed system and gets the pump back to full operating capacity.
Part Details
| Part Number | 5100044509 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Models | Machine Number |
|---|---|---|
| PT3A | PT3A | 5100042216 |
| PT3A(I) | PT3A(I) | 5100042614 |
| PT4A | PT4A | 5100042217, 5100042604 |
| 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.
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