The Wacker Neuson 5200021701 is a genuine OEM O-Ring designed for APT8T and APT8S series submersible pumps. As a direct OEM replacement, this O-Ring is manufactured to the exact material composition and dimensional tolerances specified for these pump models, ensuring a proper fluid-tight seal every time. Compatible across the full APT8T and APT8S lineup, including electric brake, surge brake, and cold weather variants. Verify your model number against the fitment list before ordering to confirm this is the correct O-Ring for your application.
Key Features
- OEM Material Specification — Manufactured to the exact compound and durometer rating specified for APT8T and APT8S pump sealing applications, maintaining compression integrity under submersible operating conditions.
- Drop-In Replacement — Sized to the original groove dimensions, so it seats correctly without trimming or adjustment during reassembly.
- Broad APT8 Series Coverage — Fits APT8T electric brake, APT8T surge brake, APT8T cold weather, APT8S with skid, and APT8S cold weather pump configurations.
- Leak Prevention — A correctly seated O-Ring maintains pump pressure integrity; a worn or damaged O-Ring allows fluid bypass that degrades pumping efficiency and can lead to internal damage over time.
- Fluid System Integrity — Used in a pump's sealing circuit, this O-Ring prevents contamination ingress and fluid loss — critical for maintaining consistent performance in submersible pump applications.
An O-Ring is a precision-molded sealing element that fits into a machined groove to create a fluid-tight barrier between mating components. In submersible pump applications like the APT8T and APT8S, O-Rings prevent water ingress into sensitive internal cavities and stop fluid from bypassing pressurized passages. When an O-Ring degrades — through compression set, chemical attack, or physical wear — it loses its ability to seal, resulting in leaks, reduced pump output, or internal contamination that can accelerate component failure.
Part Details
| Part Number | 5200021701 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT8T Pump, Electric Brake | APT8T | 5200019649, 5200019648 |
| APT8T Pump, Electric Brake, Cold Weather | APT8T CW | 5200019797, 5200019796 |
| APT8S Pump w/Skid, Cold Weather | APT8S CW | 5200019800 |
| APT8S Pump w/Skid | APT8S | 5200018987 |
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.
