The new generation CAT machines are equipped with electronically controlled fans (EC fans) that offer:

• Low power consumption

• High maintainability

• Controllable rotation direction

• Improved engine thermal efficiency

However, these fans require proper maintenance. Neglect can lead to high engine temperatures, premature wear, and potential failure. For operators accustomed to “just moving the joysticks,” this may seem cumbersome, but following proper maintenance procedures ensures reliability that exceeds traditional mechanical fans, with lower operational cost—no belts or tensioners to replace!

Usage and Maintenance Requirements

1. Periodic Reverse Operation

   • Regularly operate the fan in reverse according to working conditions.

   • This helps blow off dust accumulated on the radiator surface, much easier than cleaning manually.

2. Blade Dust Cleaning

   • Inspect and clean dust from fan blades as needed.

   • Excessive dust can cause blade imbalance, leading to premature fan assembly failure.

   • Timely cleaning when abnormal noises are detected can save significant replacement costs.

   • Note: This practical tip is rarely documented in manuals but is a major cause of fan failure.

3. Use Correct Coolant

   • Always use coolant that meets manufacturer specifications.

   • Prevent radiator blockages caused by inappropriate or cheap coolants.

4. Prompt Repair of Abnormalities

   • At the first sign of fan malfunction, take corrective action immediately.

   • Early intervention prevents further damage and higher repair costs.

Summary

• New CAT EC fans require a new maintenance approach: regular monitoring and cleaning.

• Reliability and cost-efficiency surpass conventional mechanical fans when maintained properly.

• Neglecting these steps may result in fan imbalance, overheating, and expensive replacements.

• Proper use is simple but essential: reverse operation, dust removal, correct coolant, and prompt repair.