The Wacker Neuson Timer Module is a genuine OEM component designed for the APT4S and APT4T pump series, including standard and cold weather variants. As a direct OEM replacement, this timer module is sourced from Wacker Neuson and meets the same electrical specifications as the original part fitted at the factory. Confirmed fitment spans the APT4S Pump with Skid, APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and their respective cold weather configurations. When you need a dependable, like-for-like fix, part number is the correct replacement to specify.
Key Features
- OEM-Spec Timing Accuracy — Genuine Wacker Neuson manufacture ensures the module operates at the correct switching intervals and output signals for these pump systems, not a generic approximation.
- Direct Plug-In Replacement — Engineered to connect directly to the existing wiring harness on compatible APT4S and APT4T pumps, allowing a straightforward swap without re-wiring or adaptation.
- Broad APT Series Fitment — Covers APT4S and APT4T models across both surge brake and electric brake configurations, as well as all designated cold weather variants.
- Protects Pump Operation Cycles — A correctly functioning timer module governs the pump's operational sequencing; a failed unit can cause erratic cycling, failure to start, or uncontrolled run-on that shortens pump life.
- Electrical Safety Integrity — As a genuine OEM electrical module, it meets the original design tolerances for voltage handling and switching load, an important consideration on brake-equipped trailer pump applications.
A timer module controls the timed electrical sequences within the pump system — regulating when specific functions are activated or shut off during operation. On trailer-mounted pumps like the APT4T and APT4S, this module plays a key role in coordinating the pump's run cycles and, where applicable, the brake control system. When the timer module fails, the pump may behave unpredictably — starting or stopping at the wrong intervals, or failing to engage certain functions altogether — making prompt replacement essential for safe and consistent operation.
Part Details
| Part Number | 5200020148 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Timer Module |
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.
