The Wacker Neuson Plug is a genuine OEM component designed for the APT4S and APT4T series transfer pumps, including surge brake, electric brake, and cold weather configurations. As a direct OEM part, it is manufactured to the exact specifications of the original, ensuring a correct, hassle-free installation with no guesswork. This plug is confirmed to fit across the full APT4S and APT4T lineup, covering both standard and cold weather variants. Keep a spare on hand to stay ahead of routine maintenance and avoid unnecessary delays on the job.
Key Features
- Genuine OEM Sealing Integrity — Manufactured to the original material and dimensional spec for this plug, ensuring a leak-free seal that holds up under pump operating pressures.
- Drop-In Installation — Threaded to match the original port exactly, so it seats and torques correctly without additional fittings or adapters.
- Broad APT Series Fitment — Compatible with APT4S and APT4T pumps across surge brake, electric brake, and cold weather variants, covering a wide range of Wacker Neuson transfer pump configurations.
- Protects System Integrity — A properly seated plug keeps the pump's fluid circuit closed and contaminant-free; a missing or damaged plug can cause fluid loss, air ingestion, or system pressure drop.
A plug in a transfer pump system serves as a port closure, sealing off unused or service access openings in the pump housing, manifold, or fluid circuit. It prevents fluid from escaping and stops air or debris from entering the system, both of which can compromise pump performance or cause premature wear. When a plug is cracked, loose, or missing entirely, the result is fluid leakage or a loss of prime that leaves the pump unable to move water effectively.
Part Details
| Part Number | 5100040907 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Plug |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT4T Pump, Surge Brake, Cold Weather | APT4T CW | 5200019792, 5200019793 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
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.
