The Wacker Neuson 5200019918 is a genuine OEM Diaphragm designed for APT4S and APT4T series pumps. As a direct OEM replacement sourced through authorized Wacker Neuson channels, this part is manufactured to the same specifications as the original component installed at the factory. It is confirmed to fit the APT4S Pump with Skid, APT4S Pump with Skid Cold Weather, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, APT4T Pump with Surge Brake Cold Weather, and APT4T Pump with Electric Brake Cold Weather variants. Using the correct OEM diaphragm ensures your pump returns to proper operating condition without guesswork or fitment concerns.
Key Features
- OEM-Grade Flexible Material — Manufactured from the same compound as the original, ensuring correct flex characteristics and resistance to the fluids handled by APT-series pumps.
- Drop-In Replacement — Matches the original diaphragm's dimensions and mounting profile, allowing straightforward installation without modification to the pump housing or valve assembly.
- Broad APT Series Compatibility — Fits APT4S and APT4T pump variants including standard, Cold Weather, Surge Brake, and Electric Brake configurations.
- Restores Full Pumping Capacity — A failed or cracked diaphragm causes pressure loss and fluid bypass; replacing it with this OEM part restores the pump's rated output and consistent flow.
- Fuel and Fluid System Integrity — Correct diaphragm material selection is critical in pump applications; this genuine OEM part maintains the sealing integrity required for safe and effective fluid transfer.
The diaphragm is the flexible membrane at the heart of a diaphragm pump's fluid-moving mechanism. As it flexes back and forth, it creates the alternating pressure and vacuum that draws fluid in through the inlet valve and pushes it out through the discharge valve. When the diaphragm cracks, hardens, or develops pinholes, the pump loses its ability to build pressure, resulting in reduced flow or complete loss of pumping action. Replacing a worn diaphragm promptly with part number 5200019918 restores the pump's full operational capability and prevents further damage to surrounding valve components.
Part Details
| Part Number | 5200019918 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Diaphragm |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT4T Pump, Surge Brake, Cold Weather | APT4T CW | 5200019792, 5200019793 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| 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.
