Miller 13-Inch 6-Blade Pusher Fan for Bobcat and Trailblazer Diesel Welders

Precision Cooling: Miller 13-Inch Pusher Fan

The Miller 239897 Fan, Engine Cooling is the direct OEM replacement for the cooling systems found in select Miller diesel engine-driven welders. Engineered for the Bobcat™ 250 Diesel and Trailblazer® 325 Diesel, this fan plays a vital role in thermal management. Diesel engines in welding generators operate under varying loads, often transitioning rapidly from idle to full output. Consistent, reliable airflow is non-negotiable to prevent thermal soak and ensure the longevity of internal engine components.

Technically, this unit is a 13.000-inch (330mm) 6-blade pusher fan. The pusher design is critical; it is oriented to push air through the radiator core rather than pulling it. This setup is common in industrial equipment where the engine is enclosed, ensuring that fresh ambient air is forced over the heat exchanger. The 6-blade geometry is optimized to balance noise levels with high CFM (Cubic Feet per Minute) delivery, ensuring the engine stays within its optimal thermal operating range without creating excessive auditory fatigue for the operator.

Compatibility and Specifications

This fan is specifically verified for the diesel variants of the Bobcat 250 and Trailblazer 325. It is not designed for gas models, which may utilize different cooling configurations. The hub is precision-molded to fit the engine's water pump or fan pulley flange securely. Using the correct fan is essential for maintaining the manufacturer's duty cycle ratings, as cooling capacity directly correlates to how long the machine can weld at high amperage.

• Diameter: 13.000 Inches
• Blade Count: 6 Blades
• Type: Pusher
• Application: Diesel Engine Cooling

Maintenance and Installation

Replacing the cooling fan on a Miller diesel welder is a straightforward maintenance task that yields significant reliability benefits. Ensure the engine is cool and the battery is disconnected before servicing. Access typically involves removing the side panels and potentially the fan shroud. When installing the new 239897 fan, verify the orientation is correct to ensure proper pusher airflow direction. Torque mounting bolts to the manufacturer's specified values to prevent loosening due to engine vibration. This part restores factory-level cooling performance, protecting your machine's duty cycle capabilities.