The Wacker Neuson 5200021700 is a genuine OEM O-Ring designed for the APT6T and APT6S series pumps. As a direct OEM replacement, this O-Ring is manufactured to the exact material and dimensional specifications required to maintain a proper seal within your pump assembly. Fitment covers the full APT6T and APT6S lineup, including Electric Brake, Surge Brake, and Cold Weather configurations. Verifying your pump model against part number 5200021700 before ordering ensures a correct, hassle-free installation.
Key Features
- Genuine OEM Sealing Material: — Manufactured to the precise durometer and compound specification required for hydraulic and fluid containment in APT pump assemblies — not a generic substitute.
- Drop-In Installation: — Engineered to seat directly into the original groove geometry of the APT6T and APT6S pump housings with no trimming or sizing required.
- Broad APT Series Coverage: — Fits APT6T (Electric Brake and Surge Brake) and APT6S (w/Skid) models, including all corresponding Cold Weather variants.
- Leak Prevention: — A correctly seated O-Ring maintains internal pressure integrity and prevents fluid bypass; a worn or cracked O-Ring leads to pressure loss, fluid leakage, and accelerated wear on surrounding components.
- Fuel and Fluid System Compliance: — Using the correct OEM-specified O-Ring compound is critical in pump applications where the wrong material can degrade under fluid exposure and cause seal failure.
An O-Ring is a precision-molded sealing element that fits into a machined groove between two mating surfaces to prevent fluid or air from passing through the joint. In pump assemblies like the APT6T and APT6S, O-Rings are used at critical connection points to maintain pressure and keep fluids contained within the system. When an O-Ring cracks, flattens, or swells from age or chemical exposure, the seal is compromised — resulting in leaks, loss of pump efficiency, and potential damage to adjacent components.
Part Details
| Part Number | 5200021700 |
|---|---|
| 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.
