The Wacker Neuson Upper Cover is a genuine OEM component designed for the HI 400HD G, HI 400HD D, HI 120, and HI 120HD indirect-fired air heaters. Sourced directly from Wacker Neuson, this part carries the same fit, form, and function as the cover originally installed at the factory. It is a confirmed compatible replacement across multiple HI-series heater configurations, giving you confidence before you order.
Key Features
- Genuine OEM Construction: — Manufactured to Wacker Neuson's original tooling and material specifications, ensuring the cover seats flush and maintains the heater's intended airflow management and weather protection characteristics.
- Direct-Fit Replacement: — Engineered to align with the original mounting points on the HI-series heater housing, allowing a straightforward swap without cutting, drilling, or adapting.
- Broad HI-Series Compatibility: — Fits the HI 400HD G, HI 400HD D, HI 120, and HI 120HD indirect-fired air heaters, covering both gas and diesel variants within the HI heavy-duty lineup.
- Structural Integrity Restored: — A cracked or missing upper cover exposes internal combustion and heat-exchange components to moisture, debris, and physical damage; replacing it promptly protects the heater's core components and keeps output consistent.
- Combustion Safety Compliance: — On indirect-fired heaters, the upper cover plays a role in containing and directing heat properly. Using a genuine OEM cover ensures the unit continues to operate within its intended thermal and safety envelope.
The upper cover on a Wacker Neuson indirect-fired air heater serves as the primary protective shell over the top of the unit, shielding internal burner, heat exchanger, and airflow components from the elements and physical impact on the worksite. By maintaining a sealed, correctly shaped exterior, the cover also helps direct airflow through the heater efficiently, supporting consistent heat output. When the cover is cracked, broken, or missing entirely, internal components become vulnerable to moisture ingress and debris accumulation, which can lead to reduced heating performance or damage to more costly components beneath it.
Part Details
| Part Number | 5000183903 |
|---|---|
| Old Part Number | 0183903 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Upper Cover |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 400HD G Indirect Air Heater | HI400HD G | 5000620701 |
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| HI 120 | HI120 | 5200019342 |
| 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.
