The Wacker Neuson Radiator Cap is a genuine OEM radiator cap designed for a wide range of Wacker Neuson indirect-fired air heaters, hydronic surface heaters, and ground heaters — including the HI750GM, HI900DGM, HSH380S, HSH380B, E1250S, E1250P, E2200, E3000, and CUB700GM series. As a direct OEM replacement, part meets the original design and pressure specifications for these machines, ensuring the cooling system operates exactly as intended. If your machine's radiator cap has worn, cracked, or lost its seal, this is the correct part to restore proper system function. Always cross-reference your machine's model number before ordering to confirm fitment.
Key Features
- Genuine OEM Pressure Rating — Engineered to the exact release pressure specification for Wacker Neuson liquid-cooled heating systems, maintaining correct coolant circuit pressure under sustained operation.
- Direct Drop-In Replacement — Matches the original filler neck thread and sealing surface on supported heater and ground heater models for a straightforward swap during routine service.
- Broad Series Compatibility — Confirmed fitment across HI750GM, HI900DGM, HSH380S, HSH380B, E1250S, E1250P, E2200, E3000, and CUB700GM series machines — one part number covering multiple product lines.
- Coolant System Integrity — A correctly sealing radiator cap holds the system at operating pressure, raising the coolant boiling point and preventing premature loss of coolant through overflow — a worn cap is a common cause of overheating.
- Fuel and Burn Safety — On indirect-fired heaters, overheating from a failed cooling circuit can trigger safety shutdowns or damage heat exchangers; replacing a failed cap promptly protects burner and heat exchanger longevity.
A radiator cap does more than simply close the coolant reservoir — it acts as a pressure valve for the entire cooling circuit. By maintaining a set pressure level, the cap raises the boiling point of the coolant, allowing the engine or heater burner system to operate at higher temperatures without coolant loss. When the cap's internal spring or seal wears out, the system loses pressure, coolant boils off faster, and the machine is at risk of overheating or nuisance shutdowns. On Wacker Neuson heaters and ground heater units, where reliable thermal output is critical on cold-weather job sites, keeping the cooling circuit sealed and pressurized is essential to consistent performance.
Part Details
| Part Number | 5000182031 |
|---|---|
| Old Part Number | 0182031 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Radiator Cap |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| E1250S | E1250S | 5200012355, 5200012354 |
| E3000 Ground Heater, 3kW Gen, TC | E3000 | 5100017807, 5100017809, 5100017806, 5100017808, 5100017810, 5100017811, 5100017801 |
| HI750 DGM HEATER-INDIRECT | HI750GM | 5000620859, 5000620930 |
| HI 750GM HD-Mobile Indirect Ai r Heater-Surge, -40 | HI750GMHD | 5000620969 |
| HSH380s | HSH 380S | 5100054643 |
| E 1250P Hydronic Heater, Premium, Diesel | E1250P | 5200012357, 5200012356 |
| HSH380S-Diesel, with Generator | HSH380S | 5200012371, 5200012370 |
| HSH380B-Diesel, without generator | HSH380B | 5200012359 |
| Mobile Indirect Fired Air Heat er, Diesel w/Genset | CUB700GM | 5000620759 |
| E2200 GROUND HEATER, 3kW GENERATOR | E2200 | 5100017448, 5100017449 |
| HI900 Heater-DGM,Srg,-40 | HI900DGM | 5200014221, 5200014222, 5200014165, 5200014166 |
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.
