The Wacker Neuson Knob is a genuine OEM component designed for the HI 400HD G, HI 400HD D, and HI 120HD indirect-fired air heaters. Sourced directly from Wacker Neuson, this knob is manufactured to the same specification as the original part installed at the factory. It is a direct replacement for the HI 400HD and HI 120HD heater series, ensuring proper fit and correct operation without modification. Confirm your model number before ordering to ensure compatibility with your specific unit.
Key Features
- Genuine OEM Construction — Manufactured to Wacker Neuson's original material and dimensional specification, ensuring the knob seats, rotates, and locks exactly as intended on the control assembly.
- Direct Drop-In Replacement — Engineered to mount to the original control shaft or post on compatible HI series heaters, requiring no drilling, trimming, or adaptation.
- Confirmed Fitment for HI Series Heaters — Compatible with the HI 400HD G, HI 400HD D, and HI 120HD indirect-fired air heaters — three of Wacker Neuson's most widely used portable heating units.
- Restore Precise Control — A worn, cracked, or missing knob makes it difficult to accurately set and adjust heater output; replacing it restores positive, tactile control over the unit's operating settings.
- Fuel System Compliance — On indirect-fired heaters, control knobs interact directly with fuel and airflow regulation; using a genuine OEM part ensures correct engagement with the underlying valve or selector mechanism.
A control knob on an indirect-fired air heater gives the operator direct, hands-on command over the heater's operating settings — whether that's adjusting fuel flow, fan speed, or thermostat output depending on the control layout of the unit. When a knob becomes cracked, stripped, or broken, it can slip on its shaft, making it impossible to set the heater accurately or hold a consistent output level. Replacing it with the correct OEM part restores full operator control and keeps the heater performing as intended across demanding jobsite heating applications.
Part Details
| Part Number | 5000184004 |
|---|---|
| Old Part Number | 0184004 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Knob |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 400HD G Indirect Air Heater | HI400HD G | 5000620701 |
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| HI 120HD | HI120HD | 5200019343 |
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.
