The Wacker Neuson Lower Cover is a genuine OEM component designed for the HI 400HD D and HI 120HD indirect-fired air heaters. Sourced directly from Wacker Neuson, this is the same lower cover installed at the factory — no guesswork on fitment. It is a direct match for both the HI 400HD D and HI 120HD heater models, confirming compatibility across this HD-series heater line.
Key Features
- Genuine OEM Construction: — Manufactured to Wacker Neuson's original material and dimensional specifications, ensuring the cover seats, seals, and secures exactly as the original design requires.
- Drop-In Replacement: — Matches the original mounting points and profile of the lower cover on HI 400HD D and HI 120HD heaters, allowing straightforward installation without modification.
- HD-Series Heater Fitment: — Confirmed fit for HI 400HD D (5000620868) and HI 120HD (5200019343) indirect-fired air heater models.
- Structural Integrity Restored: — A damaged or missing lower cover exposes internal heater components to debris, moisture, and impact damage; replacing it promptly protects the burner assembly and prolongs overall heater service life.
- Verified Part Number: — Order with confidence using Wacker Neuson part number 5000183904 to confirm you are receiving the correct cover for your machine.
The lower cover on an indirect-fired air heater serves as the protective outer enclosure for the base of the unit, shielding the burner, fuel components, and heat exchanger from physical damage, debris ingestion, and environmental exposure. On heavy-duty models like the HI 400HD D and HI 120HD, this cover also contributes to maintaining correct airflow routing through the heater body. When the lower cover is cracked, broken, or missing, internal components become vulnerable to damage that can compromise heating output or cause operational failure — making timely replacement essential for continued safe operation on the jobsite.
Part Details
| Part Number | 5000183904 |
|---|---|
| Old Part Number | 0183904 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lower Cover |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 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.
