The Wacker Neuson O-Ring is a genuine OEM sealing component designed for PT3A, PT4A, PT3A(I), and PT4A(I) series self-priming centrifugal trash pumps. Sourced directly from Wacker Neuson, this O-Ring is manufactured to the exact material grade and dimensional tolerances specified for these pump families. Whether you're servicing a standard PT3A or an indirect-drive PT4A(I), part number is the correct OEM replacement for maintaining a leak-free seal. Having the right O-Ring on hand keeps your pump operating at full capacity without costly fluid loss or pressure drop.
Key Features
- OEM-Specified Seal Material — Manufactured to Wacker Neuson's exact compound and durometer rating, ensuring correct compression and long-term sealing integrity in pump applications.
- Drop-In Replacement — Matches the original O-Ring profile and groove dimensions exactly, seating cleanly without modification during pump disassembly and reassembly.
- Broad PT-Series Compatibility — Fits PT3A, PT4A, PT3A(I), and PT4A(I) trash pump models, covering both standard and indirect-drive configurations in Wacker Neuson's 3- and 4-inch pump lineup.
- Leak Prevention at the Source — A correctly seated O-Ring maintains internal pressure and prevents fluid bypass, ensuring the pump delivers its rated flow and suction performance.
- Fuel and Fluid Contact Safe — Engineered for use in pump assemblies exposed to water and debris-laden fluids, holding up under the operating pressures typical of trash pump service.
An O-Ring forms a compression seal between mating pump components, preventing fluid from escaping at joints, ports, or housing interfaces. In a self-priming trash pump like the PT3A and PT4A series, a failed or worn O-Ring can cause pressure loss, reduced priming ability, and visible leakage — all of which degrade pump output and can lead to extended service interruptions. Replacing a damaged O-Ring promptly restores the sealed circuit the pump relies on to build suction and move high-volume fluid efficiently.
Part Details
| Part Number | 5100044508 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
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 (Top Cover)| PT3 - 5100 Series, PT4 - 5100 Series
