The Wacker Neuson Oil Pump Complete is a genuine OEM component designed for the APT4S and APT4T pump series, including standard, surge brake, electric brake, and cold weather variants. As a direct factory replacement, this assembly carries the same specifications as the original unit and installs without modification to the existing pump system. Whether you're servicing an APT4S Pump with Skid or any configuration of the APT4T Pump, part number is the correct, authorized replacement. Keeping the oil pump in working order is essential to protecting the pump's internal components and maintaining reliable operation across all conditions the APT series is built to handle.
Key Features
- Genuine OEM Lubrication Integrity — Factory-sourced assembly ensures correct oil delivery volume and pressure specific to Wacker Neuson APT series pump internals.
- Complete Assembly, Ready to Install — Supplied as a full oil pump complete unit, so all internal pump components arrive pre-assembled and drop into the existing mounting position.
- Broad APT Series Coverage — Fits APT4S and APT4T models across standard, surge brake, electric brake, and cold weather configurations — one part number covers the full range.
- Protects Critical Internal Components — A properly functioning oil pump maintains consistent lubrication to moving parts; a worn or failed pump accelerates wear and risks seizing the pump drive.
- Cold Weather Variant Compatible — Confirmed fitment on APT4S CW and APT4T CW cold weather models, ensuring the assembly meets the demands of low-temperature operation.
The oil pump complete is responsible for circulating lubricating oil through the pump's internal drive components, maintaining a consistent film between moving parts to prevent metal-to-metal contact and heat buildup. Without adequate oil flow, internal friction increases rapidly, leading to accelerated wear on bearings and drive components and, in severe cases, mechanical failure of the pump assembly. Replacing a worn or failed oil pump with a genuine OEM unit restores the correct flow characteristics the machine was engineered to rely on.
Part Details
| Part Number | 5200020066 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Oil Pump Complete |
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.
