Summer temperatures have pushed construction sites across the region into full swing, but the heat has also put excavator cooling systems under serious strain. For equipment owners and operators, overheating remains one of the most common—and preventable—summer breakdowns.

Industry maintenance data shows that most overheating issues start not with the engine itself, but with a clogged radiator. Dust, debris, and dried mud accumulate on radiator fins during daily operations, restricting airflow and reducing cooling efficiency by as much as 40%. A simple daily cleaning with compressed air or a low-pressure water spray can prevent this problem entirely.

Many operators mistakenly believe that coolant is only necessary in winter. In fact, quality coolant has a significantly higher boiling point than water—typically above 110°C compared to 100°C for water. Using coolant prevents the engine from boiling over under heavy loads. Coolant also contains anti-corrosion additives that protect the cooling system from rust and scale buildup year-round, extending the life of the radiator and water pump.

Manufacturer maintenance guides, including those from Kobelco and other major brands, emphasize three key checks for summer operation: daily radiator cleaning to remove debris, regular inspection of fan belt tension (loose belts reduce airflow, tight belts cause premature wear), and verification that the cooling system is filled with the correct coolant-to-water ratio for the climate.

These checks take just a few minutes per day but prevent costly downtime, major engine repairs, and reduced machine productivity during peak construction season. For fleet managers, the message is simple: a clean radiator and proper coolant keep the job moving when temperatures rise.