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 factory-authorized part, it meets the exact specifications Wacker Neuson engineered into these machines, so you can restore drive performance without guesswork. This pulley covers a broad range of APT4S and APT4T variants, making it the correct choice whether you're servicing a skid-mounted unit or a cold weather-equipped model. Keep part number on hand for planned maintenance or unscheduled repairs to get your pump back in service fast.
Key Features
- OEM Belt Engagement Accuracy — Manufactured to Wacker Neuson's exact groove profile and diameter spec, ensuring correct belt seating and tension transfer right out of the box.
- Drop-In Replacement — Matches the original mounting bore and keyway of the APT4S and APT4T pulleys, so installation follows the same procedure as the factory component.
- Broad APT Series Coverage — Compatible with APT4S and APT4T pumps across standard, surge brake, electric brake, and cold weather variants — one part number serves the full lineup.
- Sustained Power Transmission — A properly functioning pulley maintains consistent belt drive efficiency; a worn or out-of-spec pulley causes belt slippage, uneven wear, and reduced pump output.
- Genuine Wacker Neuson Quality — Sourced directly from Wacker Neuson, this part carries the same material and dimensional standards used in original equipment assembly.
A pulley is a grooved wheel that transfers rotational power from an engine or motor to a driven component — in this case, the pump drive system — via a belt. It works by maintaining the correct belt path, tension, and speed ratio between the driving and driven shafts. When a pulley wears, cracks, or runs out of true, the belt loses grip, generates excess heat, and eventually slips or fails entirely, leaving the pump unable to move fluid at the rated flow and pressure.
Part Details
| Part Number | 5200020110 |
|---|---|
| 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.
