The Wacker Neuson Retainer is a genuine OEM Retainer designed for the APT4S and APT4T pump series, including standard and cold weather variants with both surge brake and electric brake configurations. As a direct OEM replacement, this Retainer is manufactured to the same specifications as the original component installed at the factory, ensuring a correct, trouble-free installation. Verified fitment covers the APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and their respective cold weather equivalents — making this the right part whether you're servicing a standard or cold weather configured unit.
Key Features
- OEM-Grade Retention Integrity — Manufactured to the original dimensional and material tolerances, ensuring the Retainer holds its mated components securely under the operational loads typical of diaphragm pump service.
- Drop-In Replacement — Matches the original mounting points and geometry of the APT4S and APT4T pump assemblies, slotting into place without rework or modification to the surrounding components.
- Broad APT Series Fitment — Compatible across APT4S Pump with Skid and APT4T Pump configurations, including surge brake, electric brake, and cold weather variants, covering a wide range of Wacker Neuson trailer pump setups.
- Sustained Clamping Performance — A properly functioning Retainer keeps critical pump components correctly positioned during operation; a worn or failed Retainer can allow movement that leads to accelerated wear or seal failure elsewhere in the assembly.
- Genuine Wacker Neuson Part — Sourced directly through authorized Wacker Neuson supply channels and carries part number 5200019900 for straightforward verification against your machine's parts diagram.
A Retainer is a fastening or locating component used to hold a part, seal, or assembly firmly in its correct position within a larger system. In pump applications, Retainers prevent axial or radial movement of internal components that could otherwise shift under vibration, pressure, or load cycling. When a Retainer fails or wears out, the components it secures can move out of alignment, which accelerates wear on seals, bearings, or housings and can result in leaks or loss of pump performance.
Part Details
| Part Number | 5200019900 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Retainer |
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.
