The Wacker Neuson 5200021686 is a genuine OEM O-Ring designed for the APT6T and APT6S series pumps, including Electric Brake, Surge Brake, and Cold Weather configurations. As a direct OEM replacement, this seal is sourced and verified to Wacker Neuson's original specifications, ensuring it seats and compresses exactly as intended within the pump assembly. Compatible models include the APT6T Pump with Electric Brake, APT6T Pump with Surge Brake, APT6S Pump with Skid, and all corresponding Cold Weather variants. When you need a dependable seal replacement, the 5200021686 is the part Wacker Neuson specifies for these machines.
Key Features
- OEM Seal Material and Profile — Manufactured to Wacker Neuson's original compound and cross-section specifications, ensuring proper compression and fluid-tight sealing within the pump housing.
- Drop-In Replacement — Matches the original groove dimensions exactly, so the O-Ring seats without adjustment during reinstallation.
- Broad APT6 Series Coverage — Fits APT6T and APT6S configurations, including Electric Brake, Surge Brake, and Cold Weather variants across multiple machine numbers.
- Leak Prevention — A correctly installed O-Ring maintains internal pressure integrity; a worn or degraded seal can result in fluid leaks that compromise pump performance and create a mess on the worksite.
- Fluid System Integrity — Using the specified OEM part in fuel or hydraulic circuits matters — an incorrect O-Ring profile or incompatible material can swell, shrink, or extrude under operating pressure, creating a safety hazard in pressurized systems.
An O-Ring is a circular elastomeric seal that prevents fluid or gas from passing between mating components inside a pump or hydraulic assembly. In the APT6T and APT6S pump series, these seals maintain pressure boundaries and keep internal fluids from leaking at connection points or housing interfaces. When an O-Ring ages, hardens, or becomes pinched during assembly, it loses its ability to compress evenly, allowing leaks that can escalate into pump damage or system failure if not addressed promptly.
Part Details
| Part Number | 5200021686 |
|---|---|
| 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.
