The Wacker Neuson Reducer Coupling is a genuine OEM component designed for the HI 770 XHD and Arctic Bear XHD series indirect-fired diesel air heaters. As a direct factory replacement, this coupling restores proper airflow connections within the heater's ducting system and is sourced directly from Wacker Neuson to meet the original design specification. Compatible models include the HI 770 XHD Indirect Air Heater, Arctic Bear XHD, Arctic Bear XHD NS, and Arctic Bear HD units. When your existing reducer coupling cracks, seals poorly, or is damaged during service, part number is the correct OEM replacement to get your heater back to full operating capacity.
Key Features
- Genuine OEM Material Integrity — Manufactured to the original Wacker Neuson material grade and dimensional spec, ensuring proper compression sealing and airflow containment within the heater duct assembly.
- Drop-In Duct Connection — Engineered to match the exact inlet and outlet diameters of the HI 770 XHD ducting system, allowing straightforward installation without reworking connections.
- Broad HI Series Compatibility — Fits the HI 770 XHD, Arctic Bear XHD, Arctic Bear XHD NS, and Arctic Bear HD indirect diesel air heaters across multiple configurations.
- Maintains Heated Airflow Efficiency — A properly seated reducer coupling preserves directed airflow to the work area; a failed or cracked coupling allows heat loss and reduces the heater's effective output on cold-weather jobsites.
- Fuel-System Adjacent Safety — On indirect-fired heaters, duct integrity is critical to keeping combustion byproducts separated from the output airstream; using the correct OEM coupling supports safe heater operation.
A reducer coupling connects two sections of ducting with differing diameters within the heater's airflow path, transitioning the output from one duct size to another while maintaining a sealed connection. On indirect-fired diesel heaters like the HI 770 XHD, this seal is especially important because the combustion chamber is isolated from the output air — any breach in the duct coupling can compromise both heating efficiency and safe airflow separation. When the coupling cracks, warps, or loses its sealing ability, warm air escapes before reaching the intended area, and the heater's overall performance drops noticeably.
Part Details
| Part Number | 5000168738 |
|---|---|
| Old Part Number | 0168738 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Reducer Coupling |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 770 XHD Indirect Air Heater, Diesel, 1x16 | HI770XHD | 5000620183 |
| HI 770 XHD Indirect Air Heater, Diesel, 2x12 | Arctic Bear XHD | 5000620676 |
| HI770XHD Indirect Heater | Arctic Bear XHD NS | 5000620690 |
| Mobile Indirect Air Heater, Di esel | Arctic Bear HD | 5000620197 |
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.
