The Wacker Neuson Pulley is a genuine OEM component designed for the APT4S and APT4T pump series, including standard, cold weather, surge brake, and electric brake configurations. As a direct OEM replacement, this pulley is manufactured to the same specifications as the original part, ensuring a correct, trouble-free installation. It covers the full range of APT4S and APT4T variants, making it the go-to replacement whether you're servicing a skid-mounted or brake-equipped pump unit. Sourcing the correct OEM pulley protects drive system integrity and keeps your pump running at full rated output.
Key Features
- OEM Drive Geometry: — Manufactured to exact groove profile and diameter tolerances, ensuring proper belt engagement and consistent power transfer without slippage or accelerated belt wear.
- Drop-In Replacement: — Matches the original mounting bore and keyway of APT4S and APT4T pump assemblies, so installation aligns with existing hardware without rework.
- Broad APT Series Coverage: — Fits APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and all corresponding Cold Weather variants.
- Sustained Pump Output: — A correctly sized pulley maintains the designed drive ratio, delivering full flow and pressure performance from the pump. A worn or incorrectly sized pulley causes belt slip, overheating, and reduced output.
- Genuine Wacker Neuson Part: — Sourced directly from Wacker Neuson, carrying the same part number 5200020034 used in factory assembly, so you can be confident in the fitment before it arrives.
A pulley is a rotating wheel that works in conjunction with a drive belt to transmit power from an engine or motor to a driven component — in this case, the pump mechanism. It controls the speed and torque delivered to the pump by maintaining a fixed drive ratio through its diameter and groove profile. When a pulley wears, cracks, or becomes misaligned, belt slippage increases, causing heat buildup, premature belt failure, and a drop in pump flow and pressure that can bring work to a halt.
Part Details
| Part Number | 5200020034 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Pulley |
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.
