The Bomag 05904019 Thermostat is a genuine OEM component designed for Bomag cold milling machines, including the BM 1000/30-2, BM 1200/30-2, BM 1300/30-2, BM 1200/30, and BM 1300/30. Sourced directly from Bomag, this thermostat matches the original equipment specification for a straight-swap installation with no guesswork on compatibility. Keeping engine coolant temperature in the correct operating range is critical on high-output milling equipment, and this OEM part delivers the same calibrated response as the unit it replaces. If you're running Bomag cold milling machines and need a verified replacement, part number 05904019 is the correct fit.
Key Features
- OEM-Calibrated Opening Temperature — engineered to the same coolant-temperature activation point as the original, ensuring the engine reaches and holds its optimal thermal range during milling operations
- Direct Drop-In Replacement — matches the original housing dimensions and sealing interface, fitting the existing coolant circuit on compatible Bomag cold milling machines without rework
- Broad Cold Milling Machine Coverage — fits the BM 1000/30-2, BM 1200/30-2, BM 1300/30-2, BM 1200/30, and BM 1300/30, covering multiple generations of Bomag's mid-size milling lineup
- Protects Engine from Thermal Stress — a worn or stuck-open thermostat causes under-temperature running and accelerated wear; a stuck-closed unit risks overheating; replacing with a correctly rated OEM part eliminates both failure modes
- Genuine Bomag OEM Part — manufactured to Bomag's own production standards, backed by the same quality control applied to every component in the original machine build
The thermostat is a valve in the engine's cooling system that regulates coolant flow based on temperature. When the engine is cold, the thermostat remains closed, allowing the coolant to circulate only within the engine block so the engine warms up quickly and evenly. Once the coolant reaches the correct operating temperature, the thermostat opens and routes coolant through the radiator to shed excess heat. On a heavy-duty cold milling machine working under sustained load, a properly functioning thermostat is essential — a failed thermostat can cause chronic overheating or prolonged cold running, both of which degrade engine components over time and can lead to costly repairs.
Part Details
| Part Number | 05904019 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Thermostat |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Cold Milling Machine | BM1000/30-2 | 00800665 |
| Cold Milling Machine | BM1000 30-2 | 00800667 |
| Cold Milling Machine | BM1200 30-2 | 00800669, 00800671 |
| Cold Milling Machine | BM1300/30-2 | 00800673 |
| Cold Milling Machine | BM1300 30-2 | 00800675 |
| Cold Milling Machine | BM 1200/30 | 00824963 |
| Cold Milling Machine | BM 1300/30 | 00824965, 00825095 |
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.
