The Wacker Neuson 5200021687 is a genuine OEM O-Ring designed for the APT8T and APT8S submersible pump series, including Electric Brake, Surge Brake, and Cold Weather configurations. As an authentic Wacker Neuson part, the 5200021687 is manufactured to the exact material and dimensional specifications of the original, ensuring a proper seal every time. Compatible across the full APT8T and APT8S pump family, this O-Ring covers both standard and Cold Weather variants so you can order with confidence regardless of your machine's configuration.
Key Features
- OEM-Grade Sealing Material — Manufactured to the original compound and durometer specification for the APT8T and APT8S pump series, ensuring consistent compression and sealing force at the mating surfaces.
- Drop-In Replacement — Matches the original groove dimensions exactly, seating correctly in the designated channel without modification to the housing or mating components.
- Broad APT8 Family Coverage — Fits APT8T (Electric Brake and Surge Brake) and APT8S (with Skid) pumps, including all Cold Weather variants, from a single part number.
- Leak Prevention at the Source — A correctly seated O-Ring maintains the pump's internal pressure integrity; a worn or degraded ring allows water ingress or fluid bypass that can lead to seal failure and pump damage.
- Fluid System Integrity — In a submersible pump application, the O-Ring is a critical barrier between pressurized fluid passages and the external environment — using the correct OEM part maintains that barrier under continuous operating loads.
An O-Ring is a continuous loop seal that fits into a machined groove between two mating surfaces, creating a pressure-tight barrier that prevents fluid from passing through the joint. In submersible pump assemblies like the APT8T and APT8S, O-Rings are used at critical connection points where water or hydraulic fluid must be contained under sustained pressure. When an O-Ring degrades — through compression set, cracking, or swelling — the seal fails and fluid can bypass the joint, leading to reduced pump efficiency, contamination of surrounding components, or pump failure if left unaddressed.
Part Details
| Part Number | 5200021687 |
|---|---|
| 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.
