During the scorching summer months, a properly functioning air conditioning system is essential for excavator operators. It not only keeps the cab cool and comfortable but also enhances productivity and safety on site. However, frequent use during high temperatures requires correct operation and regular maintenance to ensure optimal performance and service life.

Key Operating Tips

1. Startup Sequence

Always start the engine before switching on the A/C. Turning on the air conditioner after the engine has stabilized helps avoid unnecessary load and protects the compressor from damage.

2. Temperature Setting

Adjust the temperature according to actual needs and ambient conditions. Avoid setting it too low, as it increases fuel consumption and engine load.

3. Airflow Mode

Select the airflow mode based on comfort and visibility—options include face, foot, or defrost mode. In hot weather, the face-blow mode provides the best cooling effect.

4. Air Circulation Switch

In dusty or polluted environments, use recirculation mode to reduce the intake of external air. Switch to fresh-air mode periodically to maintain ventilation and cabin air quality.

5. Avoid Prolonged Idling

Continuous A/C operation during idling can lead to increased fuel consumption and engine wear. Minimize use when the machine is stationary for extended periods.

Routine Maintenance Checklist

1. Check Refrigerant Level

Observe the sight glass—if only a few bubbles are visible and they decrease with changes in engine speed, the refrigerant level is normal. Low levels reduce cooling efficiency and may damage the compressor due to poor lubrication. Check and refill as necessary.

2. Inspect and Adjust Compressor Belt Tension

The compressor is driven by a belt; if it becomes loose or worn, cooling performance will drop. Regularly inspect the belt and adjust the tension as required.

3. Clean and Inspect the Condenser

The condenser dissipates heat from the refrigerant. Dust and debris buildup will reduce cooling efficiency. Clean and inspect the condenser fins regularly to prevent blockage.

4. Clean or Replace the Air Filter

The A/C filter removes dust and contaminants from the intake air. A clogged filter restricts airflow and lowers cooling capacity. Clean or replace it periodically to maintain optimal performance.

5. Remove Dust and Debris from Radiators

Excessive dust on the radiator increases engine temperature and fuel consumption. Keep the radiator and surrounding components clean as part of regular maintenance.