The Wacker Neuson 5200020107 is a genuine OEM O-Ring designed for the APT4S and APT4T series pumps, including cold weather, surge brake, and electric brake configurations. Sourced directly from Wacker Neuson, this O-Ring meets the exact material and dimensional specifications of the original component installed at the factory. It is confirmed compatible with the APT4S Pump with Skid, APT4S Pump with Skid Cold Weather, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, APT4T Pump with Surge Brake Cold Weather, and APT4T Pump with Electric Brake Cold Weather. When your sealing integrity is on the line, using the correct OEM part ensures a proper fit and long-term performance.
Key Features
- OEM Material Integrity — Manufactured to the exact compound and durometer specification of the original O-Ring, ensuring correct compression and sealing performance in pump applications.
- Drop-In Seal Replacement — Dimensionally identical to the factory-installed part, this O-Ring seats properly in its groove without reworking or shimming.
- Broad APT4 Series Coverage — Fits APT4S and APT4T pump variants across standard, electric brake, surge brake, and cold weather configurations.
- Leak Prevention — A correctly seated O-Ring maintains fluid containment within the pump assembly; a worn or cracked O-Ring can result in fluid loss, pressure drop, and accelerated component wear.
- Fluid System Safety — In pump systems, a failed O-Ring seal can allow fluid to escape under pressure; replacing with a genuine OEM seal helps maintain safe, contained operation.
An O-Ring is a precision loop seal used at joints, ports, and mating faces within a pump assembly to prevent fluid from leaking past a connection point. In the APT4 pump series, O-Rings maintain pressure integrity throughout the system, ensuring the pump operates efficiently and delivers consistent output. When an O-Ring degrades — through cracking, flattening, or chemical breakdown — the seal fails, allowing fluid to bypass the joint, which can lead to pressure loss, contamination, and damage to surrounding components.
Part Details
| Part Number | 5200020107 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| APT4T Pump, Electric Brake, Cold Weather | APT4T CW | 5200019793, 5200019792 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT4S Pump w/Skid | APT4S | 5200018977 |
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.
