The Wacker Neuson Glow Plug Indicator is a genuine OEM component designed for the LT4K, LTP4K, LTW4K, LTWP4K, LT4SK, and LTP4SK light tower series, as well as the HIF690 Flameless Air Heater. Sourced directly through Wacker Neuson's authorized parts network, the ensures correct fit and function with no guesswork. This indicator works in tandem with the diesel engine's glow plug system, giving the operator a clear signal that the engine is ready to start in cold or challenging conditions. If you're servicing a light tower or HIF690 unit and the preheat indication has failed, this is the direct replacement to restore proper operation.
Key Features
- Genuine OEM Electrical Spec: — Manufactured to Wacker Neuson's exact voltage and signal tolerances, ensuring the indicator reads and displays glow plug status accurately.
- Drop-In Replacement: — Matches the original mounting position and wiring connection on all covered models, making the swap straightforward for any qualified technician.
- Broad Model Coverage: — Fits the LT4K, LTP4K, LTW4K, LTWP4K, LT4SK, and LTP4SK light tower families, plus the HIF690 Flameless Air Heater — all from a single part number.
- Cold-Start Confidence: — A functioning glow plug indicator confirms preheat cycle completion before cranking, protecting the diesel engine from hard or failed starts in low-temperature environments.
- Electrical Safety Compliance: — Using the correct OEM indicator maintains the integrity of the engine control circuit, preventing miswiring or mismatched components that could cause false readings or start failures.
The glow plug indicator is a pilot light or warning lamp wired into the diesel engine's preheat circuit. When the operator turns the key to the preheat position, the indicator illuminates to show that the glow plugs are heating the combustion chamber to the temperature needed for reliable ignition. Once the light goes out or changes state, the engine is ready to crank. When this indicator fails, operators lose visibility into the preheat cycle — leading to premature start attempts, hard starting, excessive wear on the starter, and potential engine damage in cold conditions. Replacing a faulty indicator restores the operator feedback loop that protects the engine at every start.
Part Details
| Part Number | 5000089819 |
|---|---|
| Old Part Number | 0089819 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Glow Plug Indicator |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Light Tower | LT4K | 5000007620 |
| Light Tower | LTP4K | 5000007621 |
| Light Tower | LTW4K | 5000008066 |
| Light Tower | LTWP4K | 5000008067 |
| Light Tower | LT4SK | 5000007622 |
| Light Tower | LTP4SK | 5000007623 |
| HIF 690 Flameless Air Heater | HIF690 | 5100017599, 5200021915 |
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