The Wacker Neuson 5200021680 is a genuine OEM O-Ring designed for the APT6T and APT6S pump series, including electric brake, surge brake, and cold weather configurations. As a factory-sourced seal component, this O-Ring is manufactured to the exact material grade and dimensional tolerances specified for these pump assemblies, ensuring a proper compression fit at its mating interface. It is confirmed compatible with the APT6T Pump with Electric Brake, APT6T Pump with Surge Brake, APT6S Pump with Skid, and all corresponding cold weather variants.
Key Features
- Genuine OEM Seal Material — Factory-sourced elastomer compound engineered to maintain compression set resistance under the pressure and fluid conditions of the APT6T and APT6S pump systems.
- Drop-In Seal Replacement — Dimensionally identical to the original, seating correctly in the designed groove without trimming, stretching, or adapter fitting.
- Broad APT6 Series Coverage — Fits APT6T and APT6S pump models in standard, electric brake, surge brake, and cold weather configurations, making this a single part number for multiple variants.
- Leak Prevention — A properly seated O-Ring maintains a fluid-tight seal within the pump assembly; a worn or degraded ring allows fluid bypass, leading to pressure loss and potential pump damage.
- Fuel and Fluid System Integrity — In pump applications, maintaining seal integrity is critical to safe fluid handling and consistent output pressure; using the correct OEM O-Ring ensures the seal performs within rated system tolerances.
An O-Ring is a circular elastomeric seal that sits within a machined groove to create a pressure-tight barrier between mating components. In pump assemblies like the APT6T and APT6S, O-Rings prevent fluid from leaking past connection points, fittings, or housing joints, keeping system pressure stable and preventing contamination. When an O-Ring becomes flattened, cracked, or chemically degraded, it loses its ability to seal, resulting in visible leaks, reduced pump efficiency, and potential damage to surrounding components if left unaddressed.
Part Details
| Part Number | 5200021680 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT6T Pump, Electric Brake | APT6T | 5200019647, 5200019646 |
| APT6T Pump, Electric Brake, Cold Weather | APT6T CW | 5200019795, 5200019794 |
| APT6S Pump w/Skid | APT6S | 5200018982 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
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.
