The Wacker Neuson 5100021685 Gasket is a genuine OEM component designed for the APT series self-priming pump lineup, covering APT4S, APT4T, APT6S, APT6T, APT8S, and APT8T models in both standard and Cold Weather configurations. As a direct OEM replacement, part 5100021685 is manufactured to the exact material and dimensional specifications required for a proper, leak-free seal in these pumps. Whether your unit runs a surge brake, electric brake, or skid-mounted configuration, this gasket is the correct service part for your application. Confirm your model number before ordering to ensure 5100021685 is the right gasket for your specific APT pump variant.
Key Features
- OEM Sealing Integrity — Manufactured to the exact material grade and compression profile required to maintain a reliable seal in Wacker Neuson APT series pump assemblies.
- Drop-In Service Replacement — Engineered to align precisely with existing mating surfaces, allowing straightforward installation without reworking surrounding components.
- Broad APT Series Coverage — Compatible with APT4S, APT4T, APT6S, APT6T, APT8S, and APT8T pumps, including standard and Cold Weather variants across surge brake, electric brake, and skid-mounted configurations.
- Leak Prevention at the Source — A compromised or worn gasket allows fluid or air to bypass the sealed joint, reducing pump efficiency and potentially causing contamination or pressure loss. Replacing with a correct OEM gasket restores the seal to original condition.
- Genuine Wacker Neuson Part — Sourced directly from Wacker Neuson, this gasket carries the same part number used by authorized service centers, so you can be confident you are installing the right component.
A gasket forms a static seal between two mating surfaces — typically at a pump housing joint, flange, or cover — preventing fluid, air, or contaminants from leaking past the connection point. In a self-priming centrifugal pump like the Wacker Neuson APT series, maintaining an airtight seal is critical to the pump's ability to draw fluid efficiently; even a small leak at a gasket joint can cause the pump to lose prime, deliver reduced flow, or fail to self-prime altogether. When a gasket deteriorates, compresses unevenly, or is damaged during service, it must be replaced with a correctly specified part to restore proper sealing and pump performance.
Part Details
| Part Number | 5100021685 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Gasket |
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 |
| APT4T Pump, Electric Brake | APT4T | 5200019644, 5200019643 |
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT8T Pump, Surge Brake, Cold Weather | APT8T CW | 5200019796, 5200019797 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| APT8S Pump w/Skid | APT8S | 5200018987 |
| APT4T Pump, Electric Brake, Cold Weather | APT4T CW | 5200019793, 5200019792 |
| APT8T Pump, Electric Brake | APT8T | 5200019649, 5200019648 |
| APT8S Pump w/Skid, Cold Weather | APT8S CW | 5200019800 |
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.
