The Wacker Neuson Timer Set is a genuine OEM component designed for the APT4S and APT4T pump series, including standard and Cold Weather variants with surge brake and electric brake configurations. As a direct OEM part, the is sourced from Wacker Neuson and built to the same specification as the original unit installed at the factory, ensuring accurate timing control across all covered models. This Timer Set fits six distinct APT4S and APT4T pump configurations, making it the correct choice whether you are servicing a skid-mounted APT4S or a Cold Weather APT4T with electric brake. Verify your model number against the fitment list before ordering to confirm compatibility.
Key Features
- OEM-Accurate Timing Specification — Genuine Wacker Neuson part engineered to the exact timing output required by APT4S and APT4T pump systems, ensuring the control sequence performs as originally intended.
- Drop-In Replacement — Designed to connect directly to the existing wiring and mounting points on covered pump models, with no adaptation needed to complete the swap.
- 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.
- Restores Precise Pump Cycle Control — A functioning Timer Set regulates the operational cycle of the pump; a failed or drifted timer can cause erratic cycling, reduced output, or failure to prime correctly.
- Electrical Safety Compliance — As a genuine OEM electrical control component, the 5200020147 meets Wacker Neuson's original design tolerances for voltage and switching behavior, which is especially important on electric brake-equipped APT4T models.
The Timer Set controls the timed sequencing of the pump's operational cycle, signaling when the pump should engage, pause, or switch between functions based on preset intervals. On trailer-mounted dewatering pumps like the APT4T, this timing function is critical to coordinating brake actuation and pump output reliably. When the timer fails or drifts out of specification, the pump may cycle incorrectly, run continuously without shutting off at the right intervals, or fail to respond to brake or surge inputs — all of which can reduce pump effectiveness and place unnecessary stress on connected components.
Part Details
| Part Number | 5200020147 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Timer Set |
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.
Wacker Neuson