The Wacker Neuson 5200021778 Bushing is a genuine OEM component designed for the APT4S and APT4T series self-priming centrifugal trash pumps. Sourced directly from Wacker Neuson, this bushing delivers the dimensional accuracy and material integrity required to maintain proper shaft alignment and reduce internal wear within the pump assembly. It is confirmed to fit the APT4S Pump w/Skid, APT4S Pump w/Skid Cold Weather, APT4T Pump Electric Brake, APT4T Pump Electric Brake Cold Weather, APT4T Pump Surge Brake, and APT4T Pump Surge Brake Cold Weather configurations. When it comes to pump internals, genuine OEM parts are the straightforward choice for operators who depend on consistent performance across demanding job conditions.
Key Features
- OEM-Grade Material Tolerance — Manufactured to Wacker Neuson's dimensional specifications, ensuring the bushing seats correctly within the pump housing and maintains proper shaft-to-bore clearance over extended service life.
- Drop-In Replacement — Matches the original mounting geometry of the APT4S and APT4T pump families, fitting into the existing assembly without rework or modification to surrounding components.
- Broad APT-Series Coverage — Compatible across six APT4S and APT4T configurations, including standard, electric brake, surge brake, and cold weather variants.
- Protects Pump Shaft and Housing — A correctly functioning bushing absorbs rotational load and prevents metal-to-metal contact between the shaft and housing bore; a worn bushing accelerates shaft wear and can compromise pump seal integrity.
- Genuine Wacker Neuson Part — Supplied as an authentic OEM replacement, carrying the same part number — 5200021778 — used in Wacker Neuson's own service network.
A bushing in a centrifugal trash pump acts as a wear interface between the rotating shaft and the surrounding pump housing or impeller bore, controlling shaft movement and absorbing the radial loads generated during pumping operation. By maintaining the correct clearance between these components, the bushing helps preserve pump efficiency and protects more costly internal parts such as the shaft and mechanical seal. When a bushing wears beyond its service limit, shaft play increases, which can lead to vibration, accelerated seal failure, and a drop in pump output — making timely replacement essential for consistent pump performance.
Part Details
| Part Number | 5200021778 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Bushing |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| APT4T Pump, Electric Brake | APT4T | 5200019644, 5200019643 |
| APT4T Pump, Electric Brake, Cold Weather | APT4T CW | 5200019793, 5200019792 |
| APT4S Pump w/Skid | APT4S | 5200018977 |
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.
