The Wacker Neuson Relay is a genuine OEM component designed for the APT6S, APT6T, APT8S, and APT8T portable pump series. As a factory-sourced part, it meets the exact electrical specifications of the original relay installed at production, ensuring correct switching behavior and circuit protection across all supported configurations. This relay fits the full range of APT series variants, including surge brake, electric brake, and cold weather models, covering both skid-mounted and towable units.
Key Features
- Correct Switching Specification — Genuine OEM construction ensures the relay operates at the precise coil voltage and contact rating required by APT series pump electrical systems.
- Drop-In Electrical Fit — Matches the original connector configuration and mounting footprint, allowing direct installation without adapting wiring or hardware.
- Broad APT Series Coverage — Compatible with APT6S, APT6T, APT8S, and APT8T models, including surge brake, electric brake, and cold weather variants.
- Protects Pump Operation — A functioning relay ensures proper control of pump motor circuits; a failed relay can prevent startup, cause erratic operation, or leave circuits unprotected.
- Electrical Safety Compliance — As a genuine OEM part, this relay meets the original design intent for circuit switching and load protection, keeping the pump's electrical system operating within its engineered parameters.
A relay is an electrically operated switch that controls a high-current circuit using a low-current signal, allowing the pump's control system to safely activate and deactivate the motor and associated circuits without routing full load current through the operator controls. In APT series pumps, the relay plays a key role in ensuring the motor starts and stops correctly in response to control inputs. When a relay fails, symptoms can include the pump not starting, failing to shut off, or intermittent electrical faults that are difficult to diagnose without first ruling out the relay itself.
Part Details
| Part Number | 5100036721 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Relay |
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 |
| APT8S Pump w/Skid | APT8S | 5200018987 |
| APT8T Pump, Surge Brake | APT8T | 5200019648, 5200019649 |
| APT8T Pump, Surge Brake, Cold Weather | APT8T CW | 5200019796, 5200019797 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
| 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.
