The Wacker Neuson Combustion Chamber 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 part ensures the combustion assembly performs to its original specification in demanding heating applications. Sourced directly through Wacker Neuson's OEM supply chain, the delivers the fit and function contractors depend on when working in cold-weather conditions.
Key Features
- Genuine OEM Heat Tolerance — Manufactured to withstand the high-temperature combustion environment inside an indirect-fired diesel heater, maintaining structural integrity where aftermarket alternatives may warp or degrade.
- Drop-In Replacement Fit — Engineered to the original mounting and sealing interface of the HI-series heater combustion assembly, ensuring correct alignment with the burner and exhaust components on installation.
- 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 lineup.
- Sustained Heating Output — A sound combustion chamber contains and directs the burn zone efficiently; a cracked or eroded chamber leads to heat loss, incomplete combustion, and reduced BTU output at the point of use.
- Fuel System Safety Relevance — The combustion chamber isolates the burn process from the heat exchanger airstream, preventing exhaust gases from entering the conditioned air supply — a critical function in enclosed job environments.
The combustion chamber is the core enclosure where diesel fuel is ignited and burned inside an indirect-fired air heater. It contains the flame, focuses heat transfer to the exchanger, and ensures exhaust gases are routed out separately from the clean airflow delivered to the work area. When the chamber cracks, warps, or burns through, combustion efficiency drops sharply — causing incomplete fuel burn, reduced heat output, and the potential for exhaust contamination in the heated space. Replacing a failed chamber with a genuine OEM part restores full heating capacity and keeps the unit operating safely in cold-weather construction, curing, or temporary enclosure applications.
Part Details
| Part Number | 5000186738 |
|---|---|
| Old Part Number | 0186738 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Combustion Chamber |
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.
