The Wacker Neuson 5200020149 is a genuine OEM O-Ring designed for the APT4S and APT4T series self-priming trash pumps, including cold weather and surge brake variants. As a genuine Wacker Neuson part, the 5200020149 is manufactured to the same specifications as the original component fitted at the factory, ensuring a correct, leak-free seal every time. This O-Ring covers a wide range of APT4 pump configurations — APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and their respective cold weather variants — making it a versatile service part to keep on hand for fleet maintenance. Confirm the machine number against your unit before ordering to ensure you are selecting the right configuration for your pump.
Key Features
- OEM Sealing Integrity — Manufactured to the original material grade and dimensional tolerances required for a fluid-tight seal in Wacker Neuson APT4-series pump applications.
- Drop-In Replacement — Seats directly into the original groove or port without modification, restoring the sealed connection as designed.
- Broad APT4 Compatibility — Fits APT4S and APT4T pumps across surge brake, electric brake, and cold weather configurations, covering multiple machine numbers within the APT4 family.
- Maintains Pump Discharge Performance — A correctly seated O-Ring prevents internal and external leakage that would otherwise reduce flow rate, pressure, and pumping efficiency.
- Fluid System Safety — A failed or degraded O-Ring in a pump circuit can lead to uncontrolled fluid leakage; replacing with the correct OEM part restores the integrity of the sealed system.
An O-Ring is a circular elastomeric seal used at joints, ports, and connections within a pump's fluid circuit to prevent liquid from leaking past mating surfaces. In trash pump applications like the APT4S and APT4T, O-Rings maintain pressure integrity throughout the pump housing and plumbing connections, which is essential for consistent flow and suction performance. When an O-Ring degrades, cracks, or is displaced, it allows air ingestion or fluid bypass that can cause loss of prime, reduced output, or visible leakage at the affected joint.
Part Details
| Part Number | 5200020149 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| APT4T Pump, Electric Brake, Cold Weather | APT4T CW | 5200019793, 5200019792 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT4S Pump w/Skid | APT4S | 5200018977 |
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.
