Dorman 621-590 Engine Cooling Fan Blade

Overview of the Dorman 621-590 Engine Cooling Fan Blade

The Dorman 621-590 engine cooling fan blade is designed specifically for Ford Super Duty trucks, including the E-350, F-250, and F-350 models. Engineered to maintain optimal engine temperature, this fan blade ensures reliable airflow and cooling performance under demanding conditions.

• 8 durable plastic blades with forward align fin design
• Blade diameter of 505 mm for effective air movement
• Green blade color with 3.5 mm thickness for structural integrity
• Steel hub with 32 mm depth and 96.5 mm bolt circle diameter
• Clockwise rotation with a maximum speed of 3000 RPM
• Pusher airflow type for efficient engine cooling
• Standard replacement grade for dependable performance
• Mounting hardware not included

Detailed Product Description

The Dorman 621-590 engine cooling fan blade features eight forward align fin blades made from durable plastic, designed to push air efficiently through the radiator. With a blade diameter of 505 mm and a thickness of 3.5 mm, this fan blade balances strength and lightweight construction. The steel hub, measuring 32 mm in depth and featuring a 96.5 mm bolt circle diameter, provides a secure and stable mounting point. This fan blade rotates clockwise and operates at a maximum of 3000 RPM, making it suitable for the cooling demands of Ford E-350 Super Duty, F-250 Super Duty, and F-350 Super Duty trucks. The green color of the blades aids in visual inspection during maintenance. This part is a standard replacement grade, ensuring compatibility and reliable function without the need for flexible blades or additional mounting hardware.

Applications and Problem Solving

This engine cooling fan blade is used to maintain proper engine temperature by improving airflow through the radiator. It is compatible with the following Ford models:

• Ford E-350 Super Duty
• Ford F-250 Super Duty
• Ford F-350 and F-350 Super Duty

Common issues this fan blade addresses include:

• Overheating caused by inefficient airflow
• Damaged or broken fan blades reducing cooling performance
• Excessive engine temperature during heavy-duty operation
• Vibration or imbalance from worn fan blades
• Replacement of worn or corroded original fan blades

Installation Notes and Tips

Installation of the Dorman 621-590 engine cooling fan blade requires removal of the existing fan blade and mounting to the clutch or motor hub using the 96.5 mm bolt circle diameter. Note that mounting hardware is not included, so ensure you have the appropriate bolts and tools before beginning installation. The clockwise rotation must be observed to maintain proper airflow direction. Inspect the hub and mounting surface for damage or corrosion prior to installation to ensure a secure fit. Proper torque specifications should be followed to avoid loosening during operation.

Quality Assurance and Warranty

Dorman manufactures the 621-590 engine cooling fan blade to meet standard replacement grade specifications, ensuring reliable performance and fitment for Ford Super Duty trucks. The steel hub and durable plastic blades are designed for longevity under typical operating conditions. While specific warranty details are not provided, Dorman parts generally come with a limited warranty against defects in material and workmanship. For detailed warranty information, consult the product documentation or manufacturer resources.