The Wacker Neuson 5100021684 Horn Complete is a genuine OEM audible warning assembly designed for the APT-series towable self-priming centrifugal trash pump lineup. As a direct OEM replacement, this part is manufactured to the same standards as the original component installed at the factory, ensuring proper electrical connection and sound output. The 5100021684 fits an extensive range of APT configurations, including skid-mounted and towable variants with surge brake, electric brake, and cold-weather packages across the APT4S, APT4T, APT6S, APT6T, APT8S, and APT8T model families.
Key Features
- Genuine OEM Electrical Specification — Manufactured to the correct voltage draw and output rating for APT-series pump warning systems, ensuring the horn activates reliably under intended operating conditions.
- Drop-In Connector Compatibility — Matches the original wiring harness plug and mounting configuration on APT-series pumps, so installation requires only basic hand tools.
- Broad APT-Series Coverage — A single part number covers APT4S, APT4T, APT6S, APT6T, APT8S, and APT8T models, including standard, cold-weather, skid-mounted, surge brake, and electric brake variants.
- Audible Alert Integrity — A functioning horn keeps operators and bystanders informed of machine status and alarm conditions; a failed horn can compromise worksite awareness and leave safety warnings unheard.
- Safety-Critical Component — On pump equipment used in active worksites, the audible warning system is a key alert mechanism; using a correctly rated OEM replacement maintains the intended warning performance of the machine.
The horn on the APT-series towable trash pump serves as the machine's primary audible warning device, alerting operators and nearby personnel to pump status signals or alarm conditions triggered by the control system. When the horn fails or produces a weak tone, critical alerts may go unnoticed, potentially allowing the pump to run dry, overheat, or operate outside safe parameters without warning. Replacing a worn or failed horn with the correct OEM part restores the full audible warning capability the pump was built to deliver.
Part Details
| Part Number | 5100021684 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Horn Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT6S Pump w/Skid | APT6S | 5200018982 |
| APT6T Pump, Surge Brake | APT6T | 5200019646, 5200019647 |
| APT6T Pump, Surge Brake, Cold Weather | APT6T CW | 5200019794, 5200019795 |
| APT8T Pump, Electric Brake | APT8T | 5200019649, 5200019648 |
| APT8T Pump, Surge Brake, Cold Weather | APT8T CW | 5200019796, 5200019797 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
| APT4T Pump, Electric Brake, Cold Weather | APT4T CW | 5200019793, 5200019792 |
| APT8S Pump w/Skid | APT8S | 5200018987 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT8S Pump w/Skid, Cold Weather | APT8S CW | 5200019800 |
| 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.
