Multiquip 0601803660 Thermostat BDW-180

The Multiquip 0601803660 Thermostat BDW-180 is a genuine OEM thermostat designed for the DLW400ESA4 and DLW500ESA4 diesel light welder series. As a factory-sourced component, 0601803660 meets the exact specifications required by Multiquip for proper engine cooling system operation. This thermostat is a direct-fit replacement that installs without any guesswork, keeping your welder running at the correct operating temperature. If your DLW400ESA4 or DLW500ESA4 is overheating or running too cold, this is the part to reach for.

Key Features

• Genuine OEM Thermostat Integrity — Factory-sourced from Multiquip, this thermostat opens and closes at the precise temperature threshold required for correct engine thermal management in diesel welder applications.
• Direct-Fit Replacement — Engineered to drop into the existing thermostat housing on DLW400ESA4 and DLW500ESA4 models with no adaptation or custom fitting required.
• Confirmed Fitment — Verified compatibility with Multiquip DLW400ESA4 and DLW500ESA4 diesel light welders, so you can order with confidence.
• Protects Engine Longevity — A functioning thermostat ensures the engine reaches and holds optimal operating temperature, preventing the accelerated wear caused by chronic under-cooling or overheating.
• Fuel Efficiency and Output Stability — Proper thermal regulation allows the diesel engine to operate in its most efficient range, supporting consistent welding output and stable generator performance.

The thermostat is a critical component in the engine cooling circuit. It regulates coolant flow between the engine and radiator by opening once the coolant reaches a set temperature threshold, allowing heat to be expelled, and closing when the engine is cold to help it warm up quickly. A failed or stuck thermostat can cause the engine to run too hot — risking overheating and serious internal damage — or too cold, resulting in poor fuel combustion, excessive engine wear, and unstable power output from the welder.

DHS Equipment supplies genuine Multiquip OEM parts backed by manufacturer quality. For fitment questions or help confirming compatibility with your machine, contact the DHS Equipment parts team directly.

Part Details

Compatibility & Fitment

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.