The Wacker Neuson is a genuine OEM Solenoid Coil designed for the HI and HDR series diesel-fired heaters. As a direct OEM replacement sourced through authorized Wacker Neuson supply channels, this solenoid coil meets the original design specification for consistent, dependable fuel valve actuation. Confirmed fitment spans the HI 110D, HI 110HD D, HI 200D, HI 200HD D, HI 300D, and HI 300HD D indirect air heaters, as well as the HDR 115 and HDR 155 direct-fired radiant heaters. Keeping the correct coil in place ensures your heating equipment lights reliably and operates safely in cold-weather jobsite conditions.
Key Features
- Correct Coil Resistance and Actuation Spec — Genuine OEM construction ensures the coil draws the proper current to open and close the fuel valve precisely, preventing misfires or failed ignition sequences.
- Drop-In Electrical Connection — Matches the original connector and coil housing geometry of the HI and HDR heater fuel valve assemblies, so installation follows the standard service procedure without modification.
- Broad HI and HDR Series Coverage — Fits HI 110D, HI 110HD D, HI 200D, HI 200HD D, HI 300D, HI 300HD D indirect air heaters and HDR 115 and HDR 155 direct-fired radiant heaters under a single part number.
- Sustained Heat Output in Cold Conditions — A properly functioning solenoid coil allows the fuel valve to open fully on demand, maintaining rated BTU output critical for concrete curing, thaw work, and enclosed-space heating in sub-zero temperatures.
- Fuel System Safety Compliance — The solenoid coil is a primary fuel shutoff control element; using the correct OEM coil ensures the valve de-energizes and closes reliably on shutdown or fault, as the heater's safety logic requires.
The solenoid coil energizes an electromagnetic field that opens the heater's fuel valve, allowing diesel to flow to the burner during startup and operation. When the coil is de-energized — whether by a normal shutdown command or a safety fault — the valve closes immediately, cutting fuel flow. A worn or failed solenoid coil can cause hard starts, intermittent flame-outs, or a fuel valve that fails to close on shutdown, all of which compromise both heating performance and safe operation on the worksite.
Part Details
| Part Number | 5000186781 |
|---|---|
| Old Part Number | 0186781 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Solenoid Coil |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 300HD D Indirect Air Heater, Diesel | HI300HDD | 5000620867 |
| 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 115 Direct Fired Radiant Heater | HDR115 | 5100018592 |
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.
