Engine cooling fan – Hahn & Sohn HDE20SS3-DW

The cooling fan provides forced airflow through the engine radiator — without sufficient cooling, the engine may overheat, lose power, or in extreme cases suffer engine damage. A damaged or cracked fan blade reduces cooling efficiency and may cause uneven operation with vibrations.

• The fan has 7 blades and is made of plastic. The hub is marked with the direction of rotation (arrow with F400 marking) and production codes — correct orientation during installation is essential because the blades are shaped with a specific curvature for airflow in one particular direction.
• The part is designed for the four-cylinder diesel engine WEICHAI WP2.3D25E200 (Hahn & Sohn HDE20SS3-DW generator, 20 kW / 25 kVA).

WHY CUSTOMERS CHOOSE IT

• Exact match for the WEICHAI WP2.3D25E200 engine
• Marked direction of rotation — easy verification of correct installation
• Prevents engine overheating — an essential part of the cooling system

PRACTICAL TIP

When installing a new fan, check the directional arrow on the hub and verify that it matches the actual direction of rotation of the drive belt/shaft — a fan installed in the opposite direction significantly reduces cooling performance, even if it appears to rotate "normally" at first glance.

KEY FEATURES

• Type: engine cooling fan
• Material: plastic
• Number of blades: 7
• Direction of rotation marked on the hub
• Designed for engine: WEICHAI WP2.3D25E200
• Compatible generator: Hahn & Sohn HDE20SS3-DW (20 kW / 25 kVA)

USE / INSTALLATION / OPERATION

1. Disconnect the generator from the power supply and allow the engine to cool.
2. Remove the fan guard, if fitted.
3. Unscrew the old fan from the hub/shaft.
4. Install the new fan in the correct orientation according to the directional arrow on the hub.
5. Tighten the mounting bolts to the specified torque and check that the fan rotates freely without contacting surrounding parts.