Summer temperatures are rising, and for excavator operators, a working air conditioning system is more than a comfort feature—it is a productivity essential. When the cab turns into an oven, operator fatigue increases, focus drops, and efficiency suffers.

SANY's Global Service Action, a six-month campaign covering over 3,000 customers across Indonesia, includes operator training, cab cleaning, and AC filter maintenance as standard services. The program highlights that AC systems require regular attention, especially during hot seasons.

So what causes excavator AC systems to fail in summer? The two most common culprits are dirty cabin air filters and clogged condenser coils. A filter clogged with dust restricts airflow, forcing the system to work harder and cool less effectively. Condenser fins packed with debris cannot release heat properly, causing the entire system to underperform.

AC filters should be inspected every 200 hours or more frequently in dusty conditions. Cleaning or replacing clogged filters restores airflow and prevents evaporator freezing. Condenser coils and radiator fins must be cleaned of dust, mud, and debris using a soft brush or low-pressure air. High-pressure water should be avoided as it can damage the fins. Compressor belts require regular tension checks. A loose belt causes slippage and poor cooling; an overly tight belt strains the engine and accelerates wear.

For machines that have been idle for over a week, industry experts recommend starting the AC system at idle speed and letting it run for at least five minutes before normal operation. This allows refrigerant and compressor oil to circulate properly, preventing compressor failure from oil starvation.

A few minutes of preventive maintenance each week keeps excavator cabs cool, operators comfortable, and machines productive through the hottest summer months.