The Wacker Neuson Retaining Ring is a genuine OEM retaining ring designed for the APT4S and APT4T pump series, including standard, surge brake, electric brake, and cold weather variants. As a factory-sourced component, it meets the exact dimensional and material specifications of the original part, ensuring proper fitment without adjustment or rework. This retaining ring is compatible across the full APT4S and APT4T lineup, covering both skid-mounted and cold weather configurations.
Key Features
- OEM-Grade Retention Strength — Manufactured to the original groove tolerances so the ring seats and locks with the correct seating force — no under-spec flex or premature release.
- Drop-In Replacement — Matches the original snap-ring profile exactly, fitting the factory groove without filing, shimming, or resizing.
- Broad APT Series Compatibility — A single part number covers APT4S Pump with Skid, APT4T Surge Brake, APT4T Electric Brake, and all corresponding Cold Weather variants.
- Sustained Component Retention — A fully seated retaining ring keeps shafts, bearings, and internal assemblies locked in position under pump operating loads; a worn or sprung ring allows axial movement that accelerates wear on surrounding components.
- Genuine Wacker Neuson Part — Sourced directly through the Wacker Neuson OEM supply chain, so the part number, geometry, and material grade match the original production specification.
A retaining ring is a fastening device that clips into a machined groove on a shaft or inside a housing bore to hold an assembly — such as a bearing, gear, or seal — in its correct axial position. Inside a pump like the APT4S or APT4T, retaining rings resist the axial forces generated during operation and prevent internal components from walking out of position. When a retaining ring fails, cracks, or loses its tension, the parts it secures can shift, leading to accelerated wear, vibration, and potential pump failure if not addressed promptly.
Part Details
| Part Number | 5200020047 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Retaining Ring |
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.
