The Wacker Neuson 5200020503 is a genuine OEM Fan Belt designed for the APT6S, APT6T, APT8S, and APT8T series self-priming trash pumps, including skid-mounted and cold weather configurations. As a direct OEM replacement sourced through the Wacker Neuson parts program, the 5200020503 is manufactured to the same specifications as the belt installed at the factory — ensuring correct length, width, and tension profile for these pump models. Fitment covers surge brake, electric brake, skid, and cold weather variants across the APT6 and APT8 families, making this a single part number that spans the full range of APT-series configurations.
Key Features
- OEM Belt Construction — Correct cross-section profile and tensile rating engineered specifically for the APT-series pump drive system, maintaining consistent power transfer from the engine to the cooling fan.
- Drop-In Replacement — Matches the original belt routing and pulley geometry on APT6S, APT6T, APT8S, and APT8T pumps, so installation follows the standard service procedure without re-routing or pulley adjustment.
- Broad APT-Series Fitment — A single part number covers skid-mounted, surge brake, electric brake, and cold weather variants across both the APT6 and APT8 platform configurations.
- Sustained Cooling Performance — A properly tensioned fan belt keeps the cooling fan spinning at the correct speed, preventing engine overheating during high-demand pumping operations.
- Wear-Triggered Replacement — Belt slippage or cracking causes fan speed loss and increased engine temperatures; replacing with the correct OEM belt restores full thermal management capacity before damage occurs.
The fan belt on the APT-series pump transfers rotational power from the engine's crankshaft pulley to the cooling fan, keeping the engine operating within its designed temperature range during continuous pumping duty. When the belt stretches, glazes, or cracks, the fan slows or stops, which can cause the engine to overheat and shut down — interrupting pump operation and potentially causing engine damage. Replacing the belt at the first sign of wear or at the manufacturer's recommended service interval keeps the cooling system functioning as intended and protects the engine during heavy-use applications.
Part Details
| Part Number | 5200020503 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Fan Belt |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT6S Pump w/Skid | APT6S | 5200018982 |
| APT6T Pump, Surge Brake, Cold Weather | APT6T CW | 5200019794, 5200019795 |
| APT6T Pump, Surge Brake | APT6T | 5200019646, 5200019647 |
| APT8T Pump, Surge Brake | APT8T | 5200019648, 5200019649 |
| APT8S Pump w/Skid, Cold Weather | APT8S CW | 5200019800 |
| APT8S Pump w/Skid | APT8S | 5200018987 |
| APT8T Pump, Electric Brake, Cold Weather | APT8T CW | 5200019797, 5200019796 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
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.
