The Wacker Neuson Lower Cover is a genuine OEM component designed for the HI 300HD D, HI 300D, HI 90, and HI 90HD indirect-fired diesel air heaters. As a direct factory replacement, this lower cover matches the original part exactly, ensuring proper fit against the heater housing without adjustment or reworking. Sourced directly from Wacker Neuson, it carries the same quality standards as the part that shipped with your machine. If your existing lower cover is cracked, warped, or missing, this is the correct replacement to restore your unit to proper working order.
Key Features
- Genuine OEM Structural Integrity — Manufactured to the same material and dimensional specification as the original, ensuring the cover withstands the thermal cycling and vibration typical of diesel indirect-fired heater operation.
- Drop-In Housing Fit — Designed to align precisely with the existing mounting points on the heater chassis, allowing straightforward installation without modification to surrounding components.
- Broad HI Series Compatibility — Fits the HI 300HD D, HI 300D, HI 90, and HI 90HD indirect-fired diesel air heaters, covering both standard and heavy-duty variants across the HI product family.
- Protects Internal Components — The lower cover shields the heater's internal assemblies from debris, moisture, and physical damage — a compromised or missing cover can expose critical components to contamination and accelerate wear.
- Combustion Safety Enclosure — On indirect-fired heaters, proper enclosure of the combustion and heat exchanger sections is essential for safe operation; a correctly fitted lower cover helps maintain the intended airflow path and containment design.
The lower cover on a Wacker Neuson indirect-fired air heater forms part of the outer enclosure that surrounds and protects the unit's internal combustion and heat exchange components. It helps direct airflow through the heater correctly while keeping the internal assembly shielded from the surrounding environment. When the lower cover is damaged or absent, the heater's internals become exposed to dust, moisture, and physical impact — conditions that can degrade performance, shorten the life of internal parts, and compromise the safe containment of heat and combustion byproducts.
Part Details
| Part Number | 5000186743 |
|---|---|
| Old Part Number | 0186743 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lower Cover |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 300HD D Indirect Air Heater, Diesel | HI300HDD | 5000620867 |
| HI 300D, HEATER-INDIRECT, DIESEL, -20° | HI300D | 5000620866 |
| HI 90 | HI90 | 5200019340 |
| HI 90HD | HI90HD | 5200019341 |
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.
