The Wacker Neuson Spring is a genuine OEM Spring designed for the APT4S and APT4T pump series, including standard and cold weather configurations with both surge brake and electric brake variants. As a factory-authorized component, this Spring is produced to the exact specifications Wacker Neuson requires, ensuring it seats, tensions, and functions exactly as the original part did. It fits across the full APT4S and APT4T lineup — covering pump with skid and cold weather builds — so you can order with confidence regardless of which variant you're servicing. Keep this part number, on hand for routine maintenance or unplanned repairs.
Key Features
- OEM-Spec Tension and Geometry — Manufactured to the precise load rating and coil dimensions specified by Wacker Neuson, so spring behavior matches the original design intent.
- Direct Drop-In Replacement — Engineered to seat and secure identically to the factory-installed spring, with no trimming, bending, or adaptation needed during installation.
- Broad APT Series Coverage — A single part number covers APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and all corresponding cold weather variants.
- Consistent Return Force — A spring at correct tension keeps linked mechanisms operating at the right resistance; a fatigued or broken spring leads to erratic or non-responsive operation in the pump assembly.
- Genuine Wacker Neuson Part — Sourced directly through the Wacker Neuson OEM supply chain, carrying the full confidence of an authorized replacement component.
A spring in a pump assembly serves as a mechanical return or retention element — it stores energy when compressed or extended and releases it to hold a component in position, return a valve or lever to its neutral state, or maintain consistent contact between moving parts. When a spring loses its tension, cracks, or breaks entirely, the mechanism it controls may stick, fail to return to position, or operate inconsistently, leading to performance issues throughout the pump. Replacing a worn spring with the correct OEM part restores the designed mechanical behavior and keeps the pump assembly functioning as intended.
Part Details
| Part Number | 5200020154 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Spring |
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.
