ZF 4108.138.026 FAN | OEM Genuine Part

Overview

The ZF 4108.138.026 FAN is an OEM genuine component engineered for the thermal management system within heavy-duty ZF construction machinery transmissions. This part number, 4108.138.026, designates the specific fan blade assembly responsible for drawing cooling air across the transmission oil cooler and hydraulic system. Mounted directly on the input shaft or driven by a dedicated hydraulic motor, this fan ensures consistent operating temperatures during high-load cycles. The 4108.138.026 works in concert with the 0501212152: MOTOR to regulate airflow, while the 4108101153: HOUSING provides the structural enclosure that directs air precisely over the heat exchanger surfaces.

Symptoms of Failure

• Transmission overheating under load: A worn or cracked fan blade reduces volumetric airflow, causing oil temperatures to spike during digging or grading operations.
• Excessive vibration at the front of the transmission: Imbalance from a missing blade segment or hub wear transmits through the 0735370299: TAPERED ROLLER BEARING support, leading to premature bearing fatigue.
• Audible scraping or clicking noises: A loose fan hub contacting the 0501314793: COVER indicates imminent failure of the mounting interface.
• Reduced hydraulic system pressure: In fan-drive motor configurations, a seized fan can overload the hydraulic circuit, triggering relief valve chatter and sluggish implement response.

Technical Specifications

Compatibility

This fan assembly is primarily utilized in ZF WG180, WG200, and WG310 series powershift transmissions found in wheel loaders, graders, and telehandlers. It also appears in select ZF 4WG-200 and 6WG-260 models where the cooling package is driven off the torque converter housing. Always verify the blade pitch and hub pilot diameter against your specific transmission variant before installation.

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