The Wacker Neuson O-Ring Kit is a genuine OEM sealing kit designed for the HI and HDR series indirect and direct-fired air heaters, including the HI110D, HI200D, HI300D, HI400HDD, HI90HD, HI120, HI120HD, and HDR155 models, as well as MC5200 Mobile Drying Systems. As a factory-sourced component, this kit delivers the correct material grades and dimensional tolerances required to maintain leak-free connections within the heater's fuel and fluid circuits. Keeping these seals in good condition is essential for consistent heater output and safe diesel fuel system integrity. When O-rings crack, harden, or deform, fuel or fluid leaks can develop — making timely replacement with the correct kit critical.
Key Features
- Genuine OEM Sealing Material: — Factory-sourced elastomer compounds matched to the fuel and fluid compatibility requirements of Wacker Neuson HI and HDR series heater circuits.
- Complete Kit Coverage: — Includes all O-ring sizes needed for a full service interval, so one part number covers the job without piecemeal sourcing.
- Broad HI and HDR Series Fitment: — Confirmed compatibility across HI110D, HI200D, HI300D, HI400HDD, HI90HD, HI120, HI120HD, HDR155, and MC5200 Mobile Drying System models.
- Fuel System Leak Prevention: — Correctly dimensioned O-rings seat and compress to spec, maintaining diesel fuel system pressure and preventing drips that can create fire or contamination hazards.
- Safety-Critical Fit: — In diesel fuel and heating systems, improperly sized or degraded seals can allow fuel leakage near ignition sources; using the correct OEM kit ensures the seals perform to designed safety margins.
O-rings in an indirect or direct-fired air heater serve as the primary seals at fuel line connections, pump fittings, and fluid circuit joints throughout the heater assembly. They prevent diesel fuel and hydraulic fluid from escaping under the pressure and thermal cycling that occurs during normal heater operation. When O-rings age, they lose elasticity and can crack or flatten, allowing leaks that reduce heater efficiency, create fuel odors, and introduce a potential ignition risk — making them a routine but essential service item whenever the heater is inspected or the fuel system is opened.
Part Details
| Part Number | 5000183989 |
|---|---|
| Old Part Number | 0183989 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring Kit |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Mobile Drying System | MC5200 | 5000620201, 5000620232 |
| HI 300HD D Indirect Air Heater, Diesel | HI300HDD | 5000620867 |
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| HI 110HD D Indirect Air Heater, Diesel | HI110HD D | 5000620864 |
| HI 300D, HEATER-INDIRECT, DIESEL, -20° | HI300D | 5000620866 |
| HI 110D, HEATER-INDIRECT, DIESEL, -20° | HI110D | 5000620915 |
| HI 200 D Indirect Air Heater | HI200D | 5000620865, 5200011877 |
| HI 200HD D Indirect Air Heater | HI200HDD | 5000620916, 5200011878 |
| HDR 155 Direct Fired Radiant Heater | HDR155 | 5200007530 |
| HDR 45 | HDR45 | 5200013800 |
| HI 90HD | HI90HD | 5200019341 |
| 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.
Wacker Neuson