The Wacker Neuson 5200019984 is a genuine OEM Glow Plug designed for APT4T and APT4S series self-priming pumps. This is a direct OEM replacement sourced through authorized Wacker Neuson supply channels, ensuring the correct heat output, thread pitch, and electrical specification for your machine. Fitment covers the APT4T Pump with Surge Brake, APT4T Pump with Electric Brake, and APT4S Pump with Skid — including Cold Weather variants of each. Confirm your model number against the fitment list before ordering to ensure compatibility.
Key Features
- Correct Heat Output for Cold Starting — Engineered to deliver the precise glow temperature required to initiate combustion in the APT4T and APT4S diesel pump engines, including Cold Weather configurations.
- Genuine OEM Component — Sourced directly from Wacker Neuson, this glow plug meets the original electrical resistance and heat-up time specifications the engine was designed around — not an approximation.
- Direct Thread-In Replacement — Matches the OEM thread size and reach for the APT4T and APT4S cylinder head, installing into the existing port without modification to the head or wiring harness.
- Broad APT4 Series Coverage — Fits APT4T Surge Brake, APT4T Electric Brake, and APT4S with Skid variants, including standard and Cold Weather models across multiple machine numbers.
- Protects Against Hard-Start and No-Start Conditions — A failed or weak glow plug causes extended cranking, white smoke on startup, or a complete no-start. Replacing with the correct OEM part restores reliable cold-start performance.
A glow plug is a electrically heated element threaded into the pre-combustion chamber or cylinder head of a diesel engine. Before and during startup, it heats the compressed air in the cylinder to the temperature needed to ignite diesel fuel — a function that is critical in cold ambient conditions. When a glow plug weakens or fails, the engine struggles to start, cranks excessively, or produces white exhaust smoke until the engine warms. On a pump unit like the APT4T or APT4S, reliable starting directly affects site productivity, making a functioning glow plug essential to normal operation.
Part Details
| Part Number | 5200019984 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Glow Plug |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4T Pump, Surge Brake, Cold Weather | APT4T CW | 5200019792, 5200019793 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
| 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.
