The Wacker Neuson Plug is a genuine OEM component designed for the APT4S and APT4T pump series, including standard, surge brake, electric brake, and cold weather variants. As a factory-sourced part, the is manufactured to the same specifications as the original, ensuring a direct, hassle-free installation. This Plug fits across the full APT4 pump lineup, covering both skid-mounted and cold weather configurations. Keep your pump sealed and operational with the correct OEM Plug from Wacker Neuson.
Key Features
- Genuine OEM Sealing Integrity — Manufactured by Wacker Neuson to the original port dimensions and thread specification, ensuring a pressure-tight seal with no weeping or leakage.
- Direct Thread-In Replacement — Matches the original port thread and geometry, so the 5200020103 installs exactly as the factory part did — no adapters, no rework.
- Broad APT4 Series Coverage — Compatible with APT4S and APT4T pumps across surge brake, electric brake, skid-mounted, and cold weather configurations.
- Prevents Fluid Loss and Contamination — A correctly seated plug closes off unused ports, preventing hydraulic fluid or water ingress that can compromise pump performance and internal components.
- Cold Weather Variant Compatible — Verified fitment on APT4S CW and APT4T CW cold weather models, so the right part reaches the right machine regardless of spec.
A plug is used to seal off an unused or inactive port on a pump housing, preventing fluid from escaping and blocking contaminants from entering the system. On trailer-mounted water pumps like the APT4 series, plugs are critical to maintaining system pressure and protecting internal components from debris or moisture. When a plug is missing, damaged, or cross-threaded, fluid loss and contamination can follow quickly, leading to pump inefficiency or internal damage.
Part Details
| Part Number | 5200020103 |
|---|---|
| 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.
