High ambient temperatures in summer place heavy demands on engine and hydraulic cooling systems. The radiator is the core component of the cooling system, and when it becomes clogged or loses heat exchange efficiency, the equipment is prone to overheating. Maintenance statistics show that approximately 30% of summer equipment failures are related to poor cooling system performance. Regular radiator maintenance is essential to avoid costly downtime and repairs.

1. Clean External Debris Regularly
Radiator fins are easily blocked by debris such as cotton fluff, weeds, and mud, which reduces airflow and cooling capacity. After each day's work, blow compressed air through the radiator from the inside out at 0.2–0.3 MPa to clear trapped debris. Keep the nozzle at least 30 cm from the fins to avoid bending or damaging them.

2. Flush Internal Scale Build-up
Using hard water or failing to change coolant regularly can cause scale to accumulate inside the radiator, significantly reducing heat transfer efficiency. It is recommended to flush the cooling system every 500 hours using a dedicated cleaning agent. Add the agent according to the instructions, run the engine at idle for 30 minutes, drain the system, and refill with fresh coolant.

3. Use the Correct Coolant
Never use plain water as coolant—plain water has a low boiling point, promotes scale formation, and offers no corrosion protection. Always use a standard ethylene-glycol-based antifreeze, mixed to the proper ratio for the operating environment. Replace the coolant every 1,000 hours or two years, whichever comes first.

4. Inspect the Radiator Cap and Seal
The sealing performance of the radiator cap and its pressure valve function directly affect the cooling system's pressure balance. If the seal ring is cracked or aged, or the cap fails to hold pressure, replace it immediately. A faulty cap can cause premature coolant boiling, leading to overheating.

5. Monitor Overheating Warning Signs
During operation, keep an eye on the coolant temperature gauge and the high-temperature warning light. Normal operating temperature should be between 80°C and 90°C. If the temperature consistently exceeds 95°C and is accompanied by noticeable power loss, stop the machine immediately and inspect the cooling system. Continuing to operate under overheating conditions can result in cylinder scoring, head gasket failure, or other severe damage.