The Wacker Neuson 5200021731 is a genuine OEM Lip Seal designed for the APT6T and APT6S pump series, including Electric Brake, Surge Brake, and Cold Weather configurations. As a factory-sourced component, the 5200021731 meets the exact dimensional and material specifications Wacker Neuson engineers require for proper shaft sealing in these submersible pump units. This seal is confirmed to fit the APT6T and APT6S families across both standard and Cold Weather variants, making it the straightforward choice when replacing a worn or leaking seal. Keep the part number 5200021731 handy when ordering to ensure you receive the correct seal for your specific pump configuration.
Key Features
- Genuine OEM Sealing Material — Factory-sourced lip seal compound maintains the compression and flexibility required to form a consistent, fluid-tight barrier around the pump shaft under continuous submersed operation.
- Drop-In Shaft Fit — Engineered to seat directly into the original seal bore without reworking the housing, preserving proper shaft-to-seal contact geometry on installation.
- Broad APT6 Series Coverage — Confirmed fitment across APT6T Electric Brake, APT6T Surge Brake, APT6T Cold Weather, APT6S w/Skid, and APT6S Cold Weather configurations.
- Prevents Fluid Ingress and Shaft Wear — A correctly functioning lip seal keeps water and contaminants away from the pump shaft and bearings; a worn seal allows infiltration that accelerates bearing failure and shortens pump service life.
- Fluid Containment Integrity — In pump applications, a degraded lip seal can allow pumped fluid or lubricant to migrate past the shaft, creating contamination risk and potential operational failure — making timely seal replacement a critical maintenance step.
A lip seal is a precision-fit ring that wraps a flexible sealing lip around a rotating shaft, creating a barrier that keeps lubricants in and external contaminants — water, grit, and debris — out. In the APT6T and APT6S pump series, this seal protects the shaft and internal bearing surfaces from the harsh, wet environments these pumps operate in. When the lip wears, cracks, or loses its elasticity, fluid begins to bypass the seal, leading to lubricant loss, bearing contamination, and accelerated internal damage that can render the pump unserviceable.
Part Details
| Part Number | 5200021731 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lip Seal |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT6T Pump, Electric Brake, Cold Weather | APT6T CW | 5200019795, 5200019794 |
| APT6T Pump, Surge Brake | APT6T | 5200019646, 5200019647 |
| 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.
