The Wacker Neuson 5200019982 is a genuine OEM O-Ring designed for APT4S and APT4T series self-priming trash pumps. This includes cold-weather pump configurations such as the APT4S CW Pump with Skid and the APT4T CW Pump with Surge Brake and Electric Brake variants, as well as standard APT4T Pump with Surge Brake and Electric Brake models. As a genuine Wacker Neuson part, the 5200019982 is manufactured to exact OEM specifications, ensuring a correct, leak-free seal in the application it was engineered for. Keeping sealing surfaces properly maintained is one of the simplest ways to protect pump performance and avoid fluid loss during operation.
Key Features
- OEM-Grade Seal Material — Manufactured to Wacker Neuson's exact compound and dimensional spec, delivering the correct compression set and chemical resistance required for pump service.
- Drop-In Replacement — Seats directly into the original groove without trimming or modification, maintaining proper sealing geometry across all fitment configurations.
- Broad APT4S and APT4T Coverage — Fits both standard and cold-weather pump variants, including surge brake and electric brake configurations across the APT4S and APT4T series.
- Protects Pump Integrity — A properly seated O-Ring prevents fluid bypass and pressure loss, allowing the pump to maintain prime and deliver consistent flow output on the job.
- Leak Prevention — A worn or cracked O-Ring is a primary cause of suction-side or discharge-side leaks; replacing it promptly prevents pump performance degradation and potential fluid contamination.
An O-Ring is a circular elastomeric seal used at mating surfaces, port connections, and housing joints to prevent fluid or air from bypassing the sealed interface. In a self-priming trash pump like the APT4S and APT4T, O-Rings are critical to maintaining the airtight suction path the pump needs to draw fluid and hold prime. When an O-Ring degrades — through compression set, cracking, or chemical exposure — it loses its ability to form a complete seal, leading to air ingestion, loss of prime, reduced flow, or visible fluid leakage. Replacing a failed O-Ring with the correct OEM part restores the seal and returns the pump to full operating condition.
Part Details
| Part Number | 5200019982 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| APT4T Pump, Electric Brake, Cold Weather | APT4T CW | 5200019793, 5200019792 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT4S Pump w/Skid | APT4S | 5200018977 |
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.
