The Wacker Neuson Valve Assembly is a genuine OEM component designed for the APT4S and APT4T pump series, including standard, cold weather, surge brake, and electric brake configurations. As a factory-sourced part, it is manufactured to the same specifications as the original, ensuring a direct, trouble-free installation. This valve assembly is the correct replacement for six distinct APT4S and APT4T pump configurations, covering both standard and cold weather variants. Confirm your model number before ordering to ensure compatibility with your specific unit.
Key Features
- Genuine OEM Flow Control Integrity — Sourced directly from Wacker Neuson, this valve assembly maintains the precise flow regulation and pressure response the original pump design demands.
- Drop-In Installation — Engineered to match the original mounting points and port dimensions of the APT4S and APT4T pump assemblies, fitting without rework or adaptation.
- Broad APT Series Coverage — Compatible with APT4S Pump with Skid and APT4T Pump models across surge brake, electric brake, and cold weather variants.
- Consistent Pump Output — A correctly functioning valve assembly keeps fluid flow regulated and pressure stable; a worn or failing valve can result in erratic output, pressure loss, or pump inefficiency.
- Brake System Safety Relevance — On surge brake and electric brake configurations, proper valve function is directly tied to trailer brake system performance, making an exact OEM replacement the appropriate choice.
A valve assembly controls the direction and flow of fluid within the pump system, acting as a gatekeeper that opens, closes, or modulates flow in response to operating conditions. In pump applications like the APT4S and APT4T, it plays a central role in maintaining consistent output pressure and protecting downstream components. When a valve assembly wears, sticks, or fails, the pump may deliver inconsistent flow, lose pressure, or stop operating altogether — making timely replacement essential to keeping the equipment functional.
Part Details
| Part Number | 5200020138 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Valve Assembly |
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.
Wacker Neuson
Wacker Neuson Part # 5000160574 - Valve Assembly - Genuine OEM Part
