The Wacker Neuson Shaft is a genuine OEM component designed for the APT4S and APT4T series water pumps, including standard, surge brake, electric brake, and cold weather variants. As a factory-sourced part, it meets the exact dimensional and material standards set by Wacker Neuson for these pump models. Whether you are servicing an APT4S Pump with Skid or an APT4T Pump with Electric Brake, part number delivers a direct, confidence-inspiring fit. Keep this shaft on hand as a service spare to minimize unplanned downtime on the job.
Key Features
- OEM-Grade Shaft Tolerancing — Manufactured to Wacker Neuson's original dimensional specifications, ensuring correct rotational alignment and load transfer within the pump assembly.
- Drop-In Replacement — Engineered to install in the same position and orientation as the original, connecting directly to the existing pump drivetrain without rework.
- Broad APT Series Coverage — Fits the full APT4S and APT4T pump families, including standard, surge brake, electric brake, and cold weather configurations.
- Sustained Pump Output — A correctly functioning shaft maintains consistent power transfer to the pump mechanism; a worn or damaged shaft leads to vibration, reduced flow, and accelerated wear on surrounding components.
- Genuine Wacker Neuson Part — Sourced directly through authorized Wacker Neuson supply channels, so you can order with confidence that the part number and specification match your machine.
The shaft is a core rotating component within the pump drive assembly, transmitting mechanical power from the drive source to the pump impeller or drive mechanism. It must maintain precise alignment under continuous load — any wear, bending, or surface damage disrupts that transfer, causing vibration, seal failure, and loss of pumping performance. Replacing a worn shaft with a genuine OEM part like the Wacker Neuson 5200021645 restores proper drive function and protects the surrounding bearings and seals from premature failure.
Part Details
| Part Number | 5200021645 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Shaft |
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.
